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Prof. Gonzalo Barluenga
Universidad de Alaclá

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0 Building Materials
0 Sustainable Architecture
0 Concrete Technology
0 Construction and Building Technology

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Short Biography

Professor of Architectural Construction and Building Materials Department of Architecture University of Alcala, Madrid (Spain)

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Journal article
Published: 16 December 2020 in Sustainability
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Fire is a significant threat to human life and civil infrastructures. Builders and architects are hankering for safer and sustainable alternatives of concrete that do not compromise with their design intent or fire safety requirements. The aim of the present work is to improve the residual compressive performance of concrete in post-fire exposure by incorporating by-products from urban residues. Based on sustainability and circular economy motivations, the attention is focused on rubber tire fly ash, aged brick powder, and plastic (PET) bottle residuals used as partial sand replacement. The selected by-products from urban residues are used for the preparation of Cement-Based Composites (CBCs) in two different proportions (10% and 15%). Thermal CBC behaviour is thus investigated under realistic fire scenarios (i.e., Direct Flame (DF) for 1 h), by following the International Organization for Standardization (ISO) 834 standard provisions, but necessarily resulting in nonuniform thermal exposure for the cubic specimens. The actual thermal exposure is further explored with a Finite Element (FE) model, giving evidence of thermal boundaries effects. The post-fire residual compressive strength of heated concrete and CBC samples is hence experimentally derived, and compared to unheated specimens in ambient conditions. From the experimental study, the enhanced post-fire performance of CBCs with PET bottle residual is generally found superior to other CBCs or concrete. The structure–property relation is also established, with the support of Scanning Electron Microscopy (SEM) micrographs. Based on existing empirical models of literature for the prediction of the compressive or residual compressive strength of standard concrete, newly developed empirical relations for both concrete and CBCs are assessed.

ACS Style

Ajitanshu Vedrtnam; Chiara Bedon; Gonzalo Barluenga. Study on the Compressive Behaviour of Sustainable Cement-Based Composites Under One-Hour of Direct Flame Exposure. Sustainability 2020, 12, 10548 .

AMA Style

Ajitanshu Vedrtnam, Chiara Bedon, Gonzalo Barluenga. Study on the Compressive Behaviour of Sustainable Cement-Based Composites Under One-Hour of Direct Flame Exposure. Sustainability. 2020; 12 (24):10548.

Chicago/Turabian Style

Ajitanshu Vedrtnam; Chiara Bedon; Gonzalo Barluenga. 2020. "Study on the Compressive Behaviour of Sustainable Cement-Based Composites Under One-Hour of Direct Flame Exposure." Sustainability 12, no. 24: 10548.

Preprint
Published: 07 October 2020
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Fire is a significant threat to human life and civil infrastructures. Builders and architects are hankering for safer and sustainable alternatives of concrete that do not compromise with their design intent or fire safety requirements. The aim of the present work is to improve the residual compressive performance of concrete in the post-fire exposure, by incorporating by-products from urban residues. Based on sustainability and circular economy motivations, the attention is focused on rubber tire fly ash, aged brick powder, and plastic (PET) bottle residuals used as partial sand replacement. The selected by-products from urban residues are used for the preparation of Cement-Based Composites (CBCs) in two different proportions (10 % and 15 %). The thermal CBC behaviour is thus investigated under realistic fire scenarios (i.e., Direct Flame (DF) for 1 hour (1h)), by following the ISO 834 standard provisions, but necessarily resulting in non-uniform thermal exposure for the cubic specimens. The actual thermal exposure is further explored with a Finite Element (FE) model, giving evidence of thermal boundaries effects. The post-fire residual compressive strength of heated concrete and CBC samples is hence experimentally derived, and compared to unheated specimens in ambient conditions. From the experimental study, the enhanced post-fire performance of CBCs with PET bottle residual is generally found superior to other CBCs or concrete. The structure-property relation is also established, with the support of Scanning Electron Microscopy (SEM) micrographs. Based on existing empirical models of literature for the prediction of the compressive or residual compressive strength of standard concrete, newly developed empirical relations for both concrete and CBCs are assessed.

ACS Style

Ajitanshu Vedrtnam; Chiara Bedon; Gonzalo Barluenga. Study on the Compressive Behaviour of Sustainable Cement-Based Composites Under 1-Hour Direct Flame Exposure. 2020, 1 .

AMA Style

Ajitanshu Vedrtnam, Chiara Bedon, Gonzalo Barluenga. Study on the Compressive Behaviour of Sustainable Cement-Based Composites Under 1-Hour Direct Flame Exposure. . 2020; ():1.

Chicago/Turabian Style

Ajitanshu Vedrtnam; Chiara Bedon; Gonzalo Barluenga. 2020. "Study on the Compressive Behaviour of Sustainable Cement-Based Composites Under 1-Hour Direct Flame Exposure." , no. : 1.

Journal article
Published: 11 September 2020 in Materials
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Phase change materials (PCMs) are promising materials for the energy efficiency improvement of building enclosures, due to their energy storage capacity. The thermal behaviour of a multi-layered building enclosure with five different compositions of PCM cement-lime mortars was evaluated under heating and cooling cycles. The behaviour of cement-lime mortars with 20% of microencapsulated PCM mixed with other additions, such as cellulose fibres and perlite, a lightweight aggregate (LWA), were studied under climate conditions of 15 °C—82% RH (cooling) and 30 °C—33% RH (heating) that were applied with a climatic chamber. Temperature and heat flux on both sides of the multi-layered enclosure were experimentally measured in laboratory tests. Temperature was also measured on both sides of the PCM cement-lime mortar layer. It was observed that the addition of the PCM cement-lime mortar layer delayed the heat flux through the enclosure. During a heating cycle, the incorporation of PCM delayed the arrival of the heat wave front by 30 min (8.1% compared to the reference mortar without PCM). The delay of the arrival of the heat wave front during the cooling cycle after adding PCM, compared to the reference mixture, reached 40.6% (130 min of delay). Furthermore, the incorporation of LWA in PCM cement-lime mortars also improved thermal insulation, further increasing energy efficiency of the building enclosure, and can be used not only for new buildings but also for energy rehabilitation of existing building enclosures.

ACS Style

Cynthia Guardia; Gonzalo Barluenga; Irene Palomar. PCM Cement-Lime Mortars for Enhanced Energy Efficiency of Multilayered Building Enclosures under Different Climatic Conditions. Materials 2020, 13, 4043 .

AMA Style

Cynthia Guardia, Gonzalo Barluenga, Irene Palomar. PCM Cement-Lime Mortars for Enhanced Energy Efficiency of Multilayered Building Enclosures under Different Climatic Conditions. Materials. 2020; 13 (18):4043.

Chicago/Turabian Style

Cynthia Guardia; Gonzalo Barluenga; Irene Palomar. 2020. "PCM Cement-Lime Mortars for Enhanced Energy Efficiency of Multilayered Building Enclosures under Different Climatic Conditions." Materials 13, no. 18: 4043.

Conference paper
Published: 08 July 2020 in High Performance Fiber Reinforced Cement Composites 6
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Additive and digital manufacturing have opened wide new opportunities in architectonic design with cement based materials. However, there are still some issues to be addressed regarding rheological properties’ control. Among rheology modifiers, nanoclays, nanosilica and polymeric admixtures can be used to adjust rheological properties of cement paste, as yield stress, viscosity and thixotropy. These rheological properties are a key factor to control technological requirements as pumpability, extrudability and buildability. An experimental study was carried out to evaluate the combined effects of nanoclays, nanosilica and polymeric admixtures on cement paste rheology for digital fabrication, considering their interactions and synergies. A reference paste with ordinary Portland cement blended with limestone filler, 2:1 by cement weight, and a low water to binder ratio was designed. Then, four different nanoclays - attapulgite, bentonite and two types of sepiolite-, a commercial nanosilica, two types of viscosity modifying admixtures (VMA) and a high range water reducing admixture (HRWRA) were added. Flowability of cement pastes was assessed with the minicone slump test and the synergetic effect and interactions between nanoclays, nanosilica and polymeric admixtures were evaluated.

ACS Style

Hugo Varela; Gonzalo Barluenga; Irene Palomar. Rheology Evaluation of Cement Paste with Nanoclays, Nanosilica and Polymeric Admixtures for Digital Fabrication. High Performance Fiber Reinforced Cement Composites 6 2020, 144 -152.

AMA Style

Hugo Varela, Gonzalo Barluenga, Irene Palomar. Rheology Evaluation of Cement Paste with Nanoclays, Nanosilica and Polymeric Admixtures for Digital Fabrication. High Performance Fiber Reinforced Cement Composites 6. 2020; ():144-152.

Chicago/Turabian Style

Hugo Varela; Gonzalo Barluenga; Irene Palomar. 2020. "Rheology Evaluation of Cement Paste with Nanoclays, Nanosilica and Polymeric Admixtures for Digital Fabrication." High Performance Fiber Reinforced Cement Composites 6 , no. : 144-152.

Journal article
Published: 01 February 2020 in Construction and Building Materials
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SCC rheology is the key factor of fresh performance and its control is required to overcome cast in place issues regarding pumping and formwork lateral pressure that still limits its widespread use. Nanoclays are good candidates to improve rheological properties of cement pastes as yield stress, viscosity and thixotropy, controlling paste flow behavior. However, some interactions between nanoclays and admixtures can limit their efficiency. In this study, a comparative analysis on rheology and flowability of SCC cement pastes blended with limestone filler and 2% by cement weight of four types of nanoclays, attapulgite, bentonite, and sepiolite in powder form and dispersed in water, is presented. Two water to binder ratios (w/b), 0.35 and 0.45, were considered and a high range water reducing admixture (HRWRA) was used to reach the required flowability. Water adsorption of nanoclays, flowability and rheological properties of SCC cement pastes with nanoclays were evaluated. It was found that HRWRA was less effective on pastes with nanoclays and low w/b, particularly bentonite. Sepiolite showed larger water adsorption and improved rheological properties. It was observed that, the relation of nanoclays and HRWRA was decisive to produce flowability on pastes with low w/b. Besides, flowability was deeply affected by w/b, as water saturation of nanoclays increased HRWRA efficiency. All nanoclays modified rheological properties due to its different particles morphology characteristics. However, sepiolite showed the largest effects and reached the higher values of yield stress, viscosity and thixotropy ratios used.

ACS Style

Hugo Varela; Gonzalo Barluenga; Irene Palomar. Influence of nanoclays on flowability and rheology of SCC pastes. Construction and Building Materials 2020, 243, 118285 .

AMA Style

Hugo Varela, Gonzalo Barluenga, Irene Palomar. Influence of nanoclays on flowability and rheology of SCC pastes. Construction and Building Materials. 2020; 243 ():118285.

Chicago/Turabian Style

Hugo Varela; Gonzalo Barluenga; Irene Palomar. 2020. "Influence of nanoclays on flowability and rheology of SCC pastes." Construction and Building Materials 243, no. : 118285.

Conference paper
Published: 25 August 2019 in High Performance Fiber Reinforced Cement Composites 6
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Self-compacting concrete is an efficient and advantageous technology that increases cast in place speed while reduces energy consumption and health risks. However, some difficulties regarding pumping and lateral pressure on the formwork still limits its widespread use. A promising alternative for reducing the formwork pressure is the use of nanocomponents. Among them, nanoclays such as sepiolite, attapulgite, and montmorillonite can modify the rheological properties of fresh concrete, increasing early age thixotropy and structural build-up. These nanoclays have different morphology and nature, but similar size or BET surface area. In order to evaluate the effect of nanoclays on early rheology of SCC pastes, an experimental study was carried out. A reference paste with ordinary Portland cement blended with limestone filler, 3:1 by weight, was designed and two water-to binder ratios (w/b), 0.35 and 0.45, were considered. Then, four types of nanoclays were incorporated: attapulgite, montmorillonite and two types of sepiolite, one in powder form and the other dispersed in water. Water adsorption was tested using the tea-bag method in tap water and alkaline pore water. Paste consistency was measured by slump flow adjusted using a high range water reducing admixture (HRWRA). The rheological behaviour of the mixtures was tested using the mini-slump flow test. The final spread diameter and time to final spread after mixing were assessed. The aim of this study is to understand and evaluate the effect of nanoclays on the rheological parameters of pastes with cement and limestone filler, which may improve the rheology and the structural build-up at rest, overcoming the problems identified for SCC.

ACS Style

Hugo Varela; Gonzalo Barluenga; Irene Palomar; Alberto Sepulcre. Effects of Nanoclays on SCC Paste Rheology. High Performance Fiber Reinforced Cement Composites 6 2019, 517 -524.

AMA Style

Hugo Varela, Gonzalo Barluenga, Irene Palomar, Alberto Sepulcre. Effects of Nanoclays on SCC Paste Rheology. High Performance Fiber Reinforced Cement Composites 6. 2019; ():517-524.

Chicago/Turabian Style

Hugo Varela; Gonzalo Barluenga; Irene Palomar; Alberto Sepulcre. 2019. "Effects of Nanoclays on SCC Paste Rheology." High Performance Fiber Reinforced Cement Composites 6 , no. : 517-524.

Conference paper
Published: 25 August 2019 in High Performance Fiber Reinforced Cement Composites 6
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Multipurpose admixtures such as superplasticizers (SP), viscosity modifying agents (VMA) and superabsorbent polymers (SAP) are polymers commonly used in self-compacting concrete (SCC). Their main effect is positive for SCC fresh properties, minimizing some technical barriers of SCC production and cast in-place technology. However, they also affect fresh SCC rheological properties. This study addresses the rheological behaviour of fluid SCC pastes, modified with SP, VMA, SAP and their combined effects and interactions. A cement-limestone filler blended paste and two water-to-binder ratio (w/b) were designed as a reference mixture. Three dosages of VMA and SAP, 0.2%, 0.4% and 1.0% of cement weight, were investigated. The kinetics of water uptake of VMA and SAP admixtures were compared using the tea bag test in neutral pH and alkaline pH solutions. Additionally, SP was added to achieve a similar slump flow with final spread diameters of 300 mm and 400 mm, on pastes with and without VMA and SAP. The rheological parameters of the fresh pastes were tested with the mini-cone slump test. Final spread diameter, final height and time to final spread were measured after the mixing. It was found that the effectiveness of SP on the final spread diameter depended on the w/b ratio of reference paste. On the other hand, VMA increased the time to final spread, while slightly reducing the final spread diameter. SAP affected the maximum diameter due to water absorption kinetics and an increase of w/b ratio was needed to achieve similar spread diameters. It was observed that the combined use of SP and VMA or SAP affected the measured parameters. The particular effects of SP, VMA and SAP admixtures on the rheological parameters depended on w/b ratio, the amount of polymer and the combination of components.

ACS Style

Irene Palomar; Gonzalo Barluenga; Cynthia Guardia; Ma Cruz Alonso; Marina Álvarez. Rheological Characterization of Self-compacting Concrete Pastes with Polymeric Admixtures. High Performance Fiber Reinforced Cement Composites 6 2019, 491 -499.

AMA Style

Irene Palomar, Gonzalo Barluenga, Cynthia Guardia, Ma Cruz Alonso, Marina Álvarez. Rheological Characterization of Self-compacting Concrete Pastes with Polymeric Admixtures. High Performance Fiber Reinforced Cement Composites 6. 2019; ():491-499.

Chicago/Turabian Style

Irene Palomar; Gonzalo Barluenga; Cynthia Guardia; Ma Cruz Alonso; Marina Álvarez. 2019. "Rheological Characterization of Self-compacting Concrete Pastes with Polymeric Admixtures." High Performance Fiber Reinforced Cement Composites 6 , no. : 491-499.

Conference paper
Published: 25 August 2019 in High Performance Fiber Reinforced Cement Composites 6
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SCC are composed by a larger amount of paste than conventional concrete in order to achieve larger flowability without segregation. SCC pastes are typically very fluid, showing large spread diameters in consistency tests, while exhibiting high viscosity values. In this study, a mini-slump cone test is used to evaluate the fresh properties of SCC pastes with different supplementary cementitious materials (SCM), as limestone filler (LF), colloidal nanosilica (NS) and metakaolin (MK). Two amounts of NS were studied and different amounts of Superplasticizer (SP) were considered to achieve self-compacting ability. The mini-slump test has been implemented with a video acquisition setup that records the spread diameter and allows to follow the velocity of deformation of the fresh paste. The basic rheological parameters were calculated using simple analytical models obtained from the literature. The effects of the type and amount of SCM and the level of SP were analyzed. Several cones were filled in each batch and tested at different times after cast, comparing samples at rest with other stirred before testing. The comparison of both results allowed to identify the structural build-up and the reversible/irreversible processes that take place in the fresh SCC pastes and the effect of SCM and SP.

ACS Style

Gonzalo Barluenga; Irene Palomar; Cynthia Guardia; Hugo Varela; Francisco Hernandez-Olivares. Rheology and Build-Up of Fresh SCC Pastes Evaluated with the Mini-slump Cone Test. High Performance Fiber Reinforced Cement Composites 6 2019, 160 -167.

AMA Style

Gonzalo Barluenga, Irene Palomar, Cynthia Guardia, Hugo Varela, Francisco Hernandez-Olivares. Rheology and Build-Up of Fresh SCC Pastes Evaluated with the Mini-slump Cone Test. High Performance Fiber Reinforced Cement Composites 6. 2019; ():160-167.

Chicago/Turabian Style

Gonzalo Barluenga; Irene Palomar; Cynthia Guardia; Hugo Varela; Francisco Hernandez-Olivares. 2019. "Rheology and Build-Up of Fresh SCC Pastes Evaluated with the Mini-slump Cone Test." High Performance Fiber Reinforced Cement Composites 6 , no. : 160-167.

Research article
Published: 21 June 2019 in Building Simulation
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Nowadays, the use of phase change materials (PCMs) represents a novel technique employed for retrofitting facades in existing buildings, mainly to fulfil temperature comfort and building energy efficiency requirements. The present study summarizes the results of a wide series of permeability tests carried out for understanding the moisture transport phenomena by capillary action in microencapsulated-PCM (MPCM) porous cementitious composites. Particularly, twelve MPCM cement-lime mortars are analyzed, which were cast with white cement, air lime, siliceous and lightweight aggregates (LWAs), short cellulose fibers and microencapsulated paraffin waxes. A total amount of 10% and 20% of MPCM by volume was added to the plain mixtures, and physical, mechanical and thermal properties of the composites were characterized. The experimental results are employed in an inverse identification procedure aimed at unveiling the key features of the capillary action in these partly saturated MPCM porous systems. A nonlinear FEM-based model for moisture transport phenomena is used with this purpose by adopting an extended Darcy’s law. The capillary pressure is considered to control the overall diffusion-driven mechanism. The outcome of the inverse calibration allows to better understand the influence of each material component (and specially focusing on the MPCM volume fraction) on the resulting diffusion parameters, capillary pressure and the Raleigh-Ritz pore size distribution of the analyzed porous cementitious composites. The inverse calibration procedure showed that MPCM mortars with high values of the Raleigh-Ritz (B) parameter exhibit a low capillary permeability performance. Particularly, it was observed that when MPCMs are added into the analyzed mortars, an increment of the B value is numerically obtained and a subsequent reduction of the permeability performance of the composites is obtained.

ACS Style

Cynthia Guardia; Diego Said Schicchi; Antonio Caggiano; Gonzalo Barluenga; Eduardus Koenders. On the capillary water absorption of cement-lime mortars containing phase change materials: Experiments and simulations. Building Simulation 2019, 13, 19 -31.

AMA Style

Cynthia Guardia, Diego Said Schicchi, Antonio Caggiano, Gonzalo Barluenga, Eduardus Koenders. On the capillary water absorption of cement-lime mortars containing phase change materials: Experiments and simulations. Building Simulation. 2019; 13 (1):19-31.

Chicago/Turabian Style

Cynthia Guardia; Diego Said Schicchi; Antonio Caggiano; Gonzalo Barluenga; Eduardus Koenders. 2019. "On the capillary water absorption of cement-lime mortars containing phase change materials: Experiments and simulations." Building Simulation 13, no. 1: 19-31.

Journal article
Published: 19 June 2019 in Construction and Building Materials
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The influence of a microencapsulated phase change material (PCM), a lightweight aggregate (LWA) and cellulose fibers on the behavior of cement-lime mortar was investigated. Lightweight aggregates and cellulose fibers were added in order to reduce thermal conductivity. PCM in two different amounts, 10% and 20%, was included to increase thermal inertia of mortars, taking advantage of its heat storage capacity. An experimental program was carried out to assess the effect on physical, mechanical and thermal properties of the different additions and combinations. Thermal conductivity of mortars with PCM at solid and liquid states were measured and Differential Scanning Calorimetry (DSC) was used to evaluate mortars’ enthalpy. Twelve cement-lime mortars designed for rendering applications, were studied and the experimental results were compared. It was observed that the type and amount of component affected physical, mechanical and thermal mortar properties. Lightweight aggregates increased porosity while reduced strength and thermal conductivity. Cellulose fibers did not modify significantly mortar properties. PCM increased mortar enthalpy while acted as a filler, reducing porosity and strength. However, enthalpy was not linearly related only to the amount of PCM and also depended on mortar composition. LWA increased the enthalpy of PCM cement-lime mortars.

ACS Style

Cynthia Guardia; Gonzalo Barluenga; Irene Palomar; Gonzalo Diarce. Thermal enhanced cement-lime mortars with phase change materials (PCM), lightweight aggregate and cellulose fibers. Construction and Building Materials 2019, 221, 586 -594.

AMA Style

Cynthia Guardia, Gonzalo Barluenga, Irene Palomar, Gonzalo Diarce. Thermal enhanced cement-lime mortars with phase change materials (PCM), lightweight aggregate and cellulose fibers. Construction and Building Materials. 2019; 221 ():586-594.

Chicago/Turabian Style

Cynthia Guardia; Gonzalo Barluenga; Irene Palomar; Gonzalo Diarce. 2019. "Thermal enhanced cement-lime mortars with phase change materials (PCM), lightweight aggregate and cellulose fibers." Construction and Building Materials 221, no. : 586-594.

Journal article
Published: 06 February 2019 in Journal of Building Engineering
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A laboratory study investigating important thermal retrofitting solutions for simple and double (cavity) brick walls is presented. Test walls were modified using materials of current interest including an external pervious lime-cement mortar render and insulation board prior to evaluation. Laboratory simulations of steady-state winter and summer scenarios were performed using apparatus comprising two opposing climate chambers. Temperature, relative humidity and heat flux rate were monitored with surface sensors every 10 min until stabilization on each wall type, retrofitting solution and climate scenario. The temperature and relative humidity profiles, heat flux, surface temperature difference, thermal conductance, condensation risk and stabilization times were assessed. Comparisons between simple and double (cavity) brick walls showed significant differences and a high condensation risk in the non-ventilated air cavity of the double wall. The pervious lime-cement mortar render enhanced substantially the thermal performance of the single wall although increased the condensation risk of the double (cavity) wall. As expected, the insulation layer reduced the thermal conductance of the wall, although the improvement in a summer scenario was considerably lower than in winter. The different performance observed between winter and summer steady-state conditions emphasized the importance of the heat and mass transfer coupling effect. Therefore, this work proves that effective retrofitting depends on materials, wall layouts and climate conditions. These experimental results provide essential knowledge about assessing the effects of common retrofitting solutions especially under hot-dry summer scenarios.

ACS Style

I. Palomar; G. Barluenga; Richard Ball; M. Lawrence. Laboratory characterization of brick walls rendered with a pervious lime-cement mortar. Journal of Building Engineering 2019, 23, 241 -249.

AMA Style

I. Palomar, G. Barluenga, Richard Ball, M. Lawrence. Laboratory characterization of brick walls rendered with a pervious lime-cement mortar. Journal of Building Engineering. 2019; 23 ():241-249.

Chicago/Turabian Style

I. Palomar; G. Barluenga; Richard Ball; M. Lawrence. 2019. "Laboratory characterization of brick walls rendered with a pervious lime-cement mortar." Journal of Building Engineering 23, no. : 241-249.

Journal article
Published: 30 October 2018 in Construction and Building Materials
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The chemical process that takes place in Cement Based Materials (CBM) produces microstructural changes and the development of mechanical properties at Early Age (EA). CBM composition, curing conditions (temperature, relative humidity and wind speed) and structural member size can modify the chemical reaction and microstructural development, producing undesirable effects, as EA shrinkage and cracking. Thus, a robust testing methodology is required to monitor CBM at EA. To take advantage of Non-Destructive Tests (NDT) for EA monitoring but considering the uncertainty related to indirect measurements, a testing methodology that combines simultaneous measuring of temperature, capillary pressure, evaporation rate, free shrinkage, and p- and s- waves Ultrasonic Pulse Velocities (UPV) was developed. The multi-parameter technique allows to follow both the chemical, microstructural and mechanical properties development processes that take place in CBM at EA. An integrated analysis allowed defining new EA shrinkage, stress demand estimation and cracking risk models combining EA NDT parameters. The experimental setup presented in this study can be used for pastes and concretes and was verified in laboratory conditions, inside a climate chamber and in on-site real scale applications.

ACS Style

G. Barluenga; J. Puentes; I. Palomar; C. Guardia. Methodology for monitoring Cement Based Materials at Early Age combining NDT techniques. Construction and Building Materials 2018, 193, 373 -383.

AMA Style

G. Barluenga, J. Puentes, I. Palomar, C. Guardia. Methodology for monitoring Cement Based Materials at Early Age combining NDT techniques. Construction and Building Materials. 2018; 193 ():373-383.

Chicago/Turabian Style

G. Barluenga; J. Puentes; I. Palomar; C. Guardia. 2018. "Methodology for monitoring Cement Based Materials at Early Age combining NDT techniques." Construction and Building Materials 193, no. : 373-383.

Journal article
Published: 20 October 2018 in Construction and Building Materials
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An experimental study on the effect of real scale hot-dry climate conditions and full scale cast-in-place by pumping of Self-Compacting Concrete (SCC) with fly ash (FA) was carried out. The influence of water to binder ratio (w/b), mixing scale, curing conditions and cast-in-place by pumping on the early age and hardened properties and on the hardened microstructure were analyzed in SCC samples manufactured in the laboratory, in a full scale concrete plant and in an on-site application of pumped SCC. The aim of the study was to compare the early age and hardened properties of SCC mixtures manufactured in laboratory conditions and in real scale applications. It was found that the samples manufactured outside the laboratory showed changes on their properties that can be related to changes in their microstructure. The increase of w/b produced larger air gaps at the interfacial transition zone (ITZ), increased total porosity and mezzo-porosity and reduced apparent density, compressive strength and ultrasonic pulse parameters. The use of an industrial mixer in hot-dry real scale climate conditions increased w/b required to achieve self-compactability, amplified fly ash reactivity and enlarged air gaps in the ITZ. Cast in-place by pumping in hot-dry climate conditions accelerated cement hydration at early age and increased mezzo-porosity and air permeability, while reduced compressive strength.

ACS Style

G. Barluenga; M. Giménez; A. Sepulcre; Irene Palomar. Effect of full scale pumping at early age and on hardened microstructure and properties of SCC with fly ash in hot-dry curing conditions. Construction and Building Materials 2018, 191, 1128 -1138.

AMA Style

G. Barluenga, M. Giménez, A. Sepulcre, Irene Palomar. Effect of full scale pumping at early age and on hardened microstructure and properties of SCC with fly ash in hot-dry curing conditions. Construction and Building Materials. 2018; 191 ():1128-1138.

Chicago/Turabian Style

G. Barluenga; M. Giménez; A. Sepulcre; Irene Palomar. 2018. "Effect of full scale pumping at early age and on hardened microstructure and properties of SCC with fly ash in hot-dry curing conditions." Construction and Building Materials 191, no. : 1128-1138.

Journal article
Published: 01 April 2018 in Construction and Building Materials
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The type and particle size of the additions used in SCC influence the setting and early hardening, modifying hydration speed and the development of initial properties. These processes are also altered by the curing temperature and relative humidity (RH) during Early age (EA) and would also affect SCC hardened properties. An experimental study was carried out to compare the effect of different curing temperatures, 10, 20 and 30 °C, and RH, 40 and 80%, on EA and hardened properties of SCC incorporating limestone filler (LF), microsilica (MS) and nanosilica (NS). It was observed that temperature modified the reaction speed and the evolution of EA properties while relative humidity affected evaporation and shrinkage at early age and hardened porosity and stiffness. SCC microstructure and pore-network formation were found to depend on the combination of curing conditions and the type and particle size of the additions.

ACS Style

Gonzalo Barluenga; Cynthia Guardia; Javier Puentes. Effect of curing temperature and relative humidity on early age and hardened properties of SCC. Construction and Building Materials 2018, 167, 235 -242.

AMA Style

Gonzalo Barluenga, Cynthia Guardia, Javier Puentes. Effect of curing temperature and relative humidity on early age and hardened properties of SCC. Construction and Building Materials. 2018; 167 ():235-242.

Chicago/Turabian Style

Gonzalo Barluenga; Cynthia Guardia; Javier Puentes. 2018. "Effect of curing temperature and relative humidity on early age and hardened properties of SCC." Construction and Building Materials 167, no. : 235-242.

Conference paper
Published: 05 March 2018 in Libro de Comunicaciones / Livro das Comunicações
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El uso de Hormigones autocompactantes (HAC) se ha incrementado durante los últimos años. Su comportamiento a edades tempranas (ET), junto a su facilidad de colocación aporta ventajas constructivas para la industria del hormigón encofrado in situ. Las propiedades autonivelantes y su capacidad de distribuirse con facilidad por la acción de su propio peso sin sufrir segregación obedecen al incremento de finos y a la reducción del tamaño de partículas en la mezcla. El uso de adiciones como el filler calizo, nanosílice, microsílice, metacaolín incrementa el volumen de la pasta y se considera que mejora la durabilidad del hormigón de resistencias moderadas. Sin embargo esta variación también afecta el proceso de hidratación y la formación de la microestructura en la medida que el material adquiere la estructura rígida. Para evaluar la mejora producida por las diferentes adiciones en el comportamiento a edades tempranas en condiciones de curado adversas y sus consecuencias en la durabilidad a largo plazo, se ha llevado a cabo un estudio experimental. El estudio se desarrolló en dos partes. Durante la primera etapa se monitorizó el proceso de formación de la microestructura en las primeras 24 horas bajo condiciones controladas de laboratorio (desecación superficial producida por efecto del viento) incrementando el riesgo de fisuración, y los efectos en la formación de la microestructura porosa del hormigón joven. En la segunda etapa, se midió la permeabilidad al aire y al agua en muestras de HAC que sufrieron fisuración a edades tempranas y otras no fisuradas de 5 años de edad. Se constató que las muestras fisuradas tienen una mayor permeabilidad al aire y al agua que las no fisuradas y que los valores de la permeabilidad al aire fueron similares en los HAC con adiciones minerales. A la vista de estos resultados se puede afirmar que la permeabilidad a largo plazo de los HAC estudiados depende más de la fisuración a edades tempranas que de la composición de la muestra. Una vez establecidos la permeabilidad, se evaluó la capacidad de las diferentes dosificaciones de soportar el ataque en ambientes agresivos, relacionando la permeabilidad del material con ensayos de velocidad de carbonatación, permeabilidad a cloruros, ensayo hielo-deshielo y comportamiento en entornos ácidos.DOI: http://dx.doi.org/10.4995/HAC2018.2018.5615

ACS Style

Nelson Flores Medina; Gonzalo Barluenga Badiola; Javier Puentes Mojica; Cynthia Guardia Martín. Efecto de la fisuración a edades tempranas en la durabilidad de hormigones autocompactantes. Libro de Comunicaciones / Livro das Comunicações 2018, 1 .

AMA Style

Nelson Flores Medina, Gonzalo Barluenga Badiola, Javier Puentes Mojica, Cynthia Guardia Martín. Efecto de la fisuración a edades tempranas en la durabilidad de hormigones autocompactantes. Libro de Comunicaciones / Livro das Comunicações. 2018; ():1.

Chicago/Turabian Style

Nelson Flores Medina; Gonzalo Barluenga Badiola; Javier Puentes Mojica; Cynthia Guardia Martín. 2018. "Efecto de la fisuración a edades tempranas en la durabilidad de hormigones autocompactantes." Libro de Comunicaciones / Livro das Comunicações , no. : 1.

Journal article
Published: 01 January 2018 in Construction and Building Materials
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ACS Style

Irene Palomar; G. Barluenga. A multiscale model for pervious lime-cement mortar with perlite and cellulose fibers. Construction and Building Materials 2018, 160, 136 -144.

AMA Style

Irene Palomar, G. Barluenga. A multiscale model for pervious lime-cement mortar with perlite and cellulose fibers. Construction and Building Materials. 2018; 160 ():136-144.

Chicago/Turabian Style

Irene Palomar; G. Barluenga. 2018. "A multiscale model for pervious lime-cement mortar with perlite and cellulose fibers." Construction and Building Materials 160, no. : 136-144.

Journal article
Published: 01 November 2017 in Construction and Building Materials
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ACS Style

Tahar Tioua; Abdelouahed Kriker; Gonzalo Barluenga; Irene Palomar. Influence of date palm fiber and shrinkage reducing admixture on self-compacting concrete performance at early age in hot-dry environment. Construction and Building Materials 2017, 154, 721 -733.

AMA Style

Tahar Tioua, Abdelouahed Kriker, Gonzalo Barluenga, Irene Palomar. Influence of date palm fiber and shrinkage reducing admixture on self-compacting concrete performance at early age in hot-dry environment. Construction and Building Materials. 2017; 154 ():721-733.

Chicago/Turabian Style

Tahar Tioua; Abdelouahed Kriker; Gonzalo Barluenga; Irene Palomar. 2017. "Influence of date palm fiber and shrinkage reducing admixture on self-compacting concrete performance at early age in hot-dry environment." Construction and Building Materials 154, no. : 721-733.

Journal article
Published: 17 August 2017 in Construction and Building Materials
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An experimental study comprising laboratory and real scale tests was carried out to evaluate the usefulness of several pumping, early age and hardened parameters for pumped Self-Compacting Concrete (SCC) quality control. Two pumped SCC, with fly ash and limestone filler, were tested. Pumpability was controlled online by real-time measuring of pumping pressure and discharge rate. Temperature, capillary pressure, dimensional stability and P-wave ultrasonic pulse transmission (UPV) were measured simultaneously to monitor microstructure evolution at early age (EA). UPV (P- and S-waves) were also used as non-destructive testing method for hardened quality control. Pumping reduced compressive strength between 12 and 16% and changed air permeability, although did not modify porosity accessible to water. These Quality Control Parameters (QCP) showed their ability to detect the changes on material’s pumping, EA and hardened performance. Accordingly, they can be used to establish acceptance limits and to identify potential issues arising from undesired changes in material’s properties.

ACS Style

G. Barluenga; M. Giménez; A. Rodríguez; O. Rio. Quality Control Parameters for on-site evaluation of pumped Self-Compacting Concrete. Construction and Building Materials 2017, 154, 1112 -1120.

AMA Style

G. Barluenga, M. Giménez, A. Rodríguez, O. Rio. Quality Control Parameters for on-site evaluation of pumped Self-Compacting Concrete. Construction and Building Materials. 2017; 154 ():1112-1120.

Chicago/Turabian Style

G. Barluenga; M. Giménez; A. Rodríguez; O. Rio. 2017. "Quality Control Parameters for on-site evaluation of pumped Self-Compacting Concrete." Construction and Building Materials 154, no. : 1112-1120.

Journal article
Published: 01 May 2017 in Construction and Building Materials
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ACS Style

Irene Palomar; Gonzalo Barluenga. Assessment of lime-cement mortar microstructure and properties by P- and S- ultrasonic waves. Construction and Building Materials 2017, 139, 334 -341.

AMA Style

Irene Palomar, Gonzalo Barluenga. Assessment of lime-cement mortar microstructure and properties by P- and S- ultrasonic waves. Construction and Building Materials. 2017; 139 ():334-341.

Chicago/Turabian Style

Irene Palomar; Gonzalo Barluenga. 2017. "Assessment of lime-cement mortar microstructure and properties by P- and S- ultrasonic waves." Construction and Building Materials 139, no. : 334-341.

Proceedings article
Published: 01 January 2016 in TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES
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Drying shrinkage can be a major reason for the deterioration of concrete structures. Variation in ambient temperature and relative humidity cause changes in the properties of hardened concrete which can affect their mechanical and drying shrinkage characteristics. The present study investigated mechanical strength and particularly drying shrinkage properties of self-compacting concretes (SCC) reinforced with date palm fiber exposed to hot and dry environment. In this study a total of nine different fibers reinforced self compacting concrete (FRSCC) mixtures and one mixture without fiber were prepared. The volume fraction and the length of fibers reinforcement were 0.1-0.2-0.3% and 10-20-30 mm. It was observed that drying shrinkage lessened with adding low volumetric fraction and short length of fibers in curing condition (T = 20 °C and RH = 50 ± 5 %), but increased in hot and dry environment.

ACS Style

Tahar Tioua; Abdelouahed Kriker; Aimad Salhi; Gonzalo Barluenga. Effect of hot-dry environment on fiber-reinforced self-compacting concrete. TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES 2016, 1758, 30024 .

AMA Style

Tahar Tioua, Abdelouahed Kriker, Aimad Salhi, Gonzalo Barluenga. Effect of hot-dry environment on fiber-reinforced self-compacting concrete. TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES. 2016; 1758 ():30024.

Chicago/Turabian Style

Tahar Tioua; Abdelouahed Kriker; Aimad Salhi; Gonzalo Barluenga. 2016. "Effect of hot-dry environment on fiber-reinforced self-compacting concrete." TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES 1758, no. : 30024.