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Prof. Pedro Serna
Universitat Politècnica de València (UPV), ICITECH

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Fiber Reinforced Concrete
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Shear
UHPFRC
self healing
Creep Behaviour
Technology
mix design

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Journal article
Published: 31 May 2021 in Materials
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This work studies the possibility of incorporating different proportions of glass powder from the waste glass (rejected material called fine cullet) produced during the glass recycling process into the manufacturing of mortar and concrete. For this purpose, the material is characterized by its chemical composition and pozzolanic activity, and the shape and size of its particles are studied. It is then incorporated as a substitute for cement into the manufacturing of mortar and concrete at 25% and 40% of cement weight, and its effect on setting times, consistency, and mechanical strength is analyzed. Its behavior as a slow pozzolan is verified, and the possibility of incorporating it into concrete is ratified by reducing its cement content and making it a more sustainable material.

ACS Style

Ester Gimenez-Carbo; Lourdes Soriano; Marta Roig-Flores; Pedro Serna. Characterization of Glass Powder from Glass Recycling Process Waste and Preliminary Testing. Materials 2021, 14, 2971 .

AMA Style

Ester Gimenez-Carbo, Lourdes Soriano, Marta Roig-Flores, Pedro Serna. Characterization of Glass Powder from Glass Recycling Process Waste and Preliminary Testing. Materials. 2021; 14 (11):2971.

Chicago/Turabian Style

Ester Gimenez-Carbo; Lourdes Soriano; Marta Roig-Flores; Pedro Serna. 2021. "Characterization of Glass Powder from Glass Recycling Process Waste and Preliminary Testing." Materials 14, no. 11: 2971.

Journal article
Published: 21 May 2021 in Materials and Structures
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To date there is no clear consensus about how creep of cracked FRC structural elements should be considered. In recent years, different methodologies have been developed for multiple stress cases. The absence of a standardised methodology to evaluate flexural creep in the cracked state has hindered general comparisons and conclusions that could lead to significant advances in this topic. Since 2014, the study of the creep behaviour of cracked FRC has been coordinated by the RILEM TC 261-CCF. All the available creep methodologies were analysed in terms of procedure, equipment and results. A comprehensive Round-Robin Test (RRT) on the creep behaviour of cracked sections of FRC was proposed and undertaken by a total of 19 participant laboratories from 14 countries all over the world. The analysis and conclusions of the RRT results and the different methodologies provided the basis for this recommendation. This recommendation focuses on the test method to evaluate the flexural creep of FRC specimens in the cracked state. Guidelines on specimen production, detailed test equipment, experimental setup and test procedure as well as the definitions of the most relevant parameters are provided.

ACS Style

A. Llano-Torre; P. Serna. Recommendation of RILEM TC 261-CCF: test method to determine the flexural creep of fibre reinforced concrete in the cracked state. Materials and Structures 2021, 54, 1 -20.

AMA Style

A. Llano-Torre, P. Serna. Recommendation of RILEM TC 261-CCF: test method to determine the flexural creep of fibre reinforced concrete in the cracked state. Materials and Structures. 2021; 54 (3):1-20.

Chicago/Turabian Style

A. Llano-Torre; P. Serna. 2021. "Recommendation of RILEM TC 261-CCF: test method to determine the flexural creep of fibre reinforced concrete in the cracked state." Materials and Structures 54, no. 3: 1-20.

Journal article
Published: 11 March 2021 in Sustainability
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This paper analyzes the autogenous self-healing capacity of early-age Ultra-High-Performance Fiber-Reinforced concretes (UHPFRCs) by measuring the crack closure and the possible mechanical recovery on healed specimens. The main parameters considered in this research were the healing exposure conditions (humidity chamber, immersion in tap water, immersion in seawater and heat curing) and the precracking levels (microcracks and macrocracks). For the microcrack level, four-point bending tests were performed on prismatic specimens (100 × 100 × 500 mm3) obtaining a multiple cracking pattern characterized by crack widths ranged from 10 to 20 µm. Whereas for the macrocrack level (behavior after crack localization), splitting tests were carried out on notched cubic specimens (100 × 100 × 100 mm3) obtaining crack widths of up to 0.4 mm. For both precracking levels, specimens were precracked at two days and were cured for one month in the mentioned exposure conditions. Healing products were analyzed on the specimen surface and also inside the cracks; to this purpose, their microstructure was analyzed by means of SEM and EDS analyses. The results have shown that the highest crack closure values were obtained for the heat-cured specimens and for the specimens immersed in water (tap water and seawater) whereas the less efficient condition was the humidity chamber.

ACS Style

Estefania Cuenca; Pedro Serna. Autogenous Self-Healing Capacity of Early-Age Ultra-High-Performance Fiber-Reinforced Concrete. Sustainability 2021, 13, 3061 .

AMA Style

Estefania Cuenca, Pedro Serna. Autogenous Self-Healing Capacity of Early-Age Ultra-High-Performance Fiber-Reinforced Concrete. Sustainability. 2021; 13 (6):3061.

Chicago/Turabian Style

Estefania Cuenca; Pedro Serna. 2021. "Autogenous Self-Healing Capacity of Early-Age Ultra-High-Performance Fiber-Reinforced Concrete." Sustainability 13, no. 6: 3061.

Journal article
Published: 09 March 2021 in Materiales de Construcción
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Self-healing of concrete is the process in which the material regenerates itself repairing inner cracks. This process can be produced by autogenous or autonomous healing. Autogenous healing is a natural process, produced by carbonation and/or continuing hydration. Autonomous healing is based on the use of specific agents to produce self-healing, which can be added directly to the concrete matrix, embedded in capsules or introduced through vascular networks. Some examples are superabsorbent polymers, crystalline admixtures, microencapsulated sodium silicate, and bacteria. This review is structured into two parts. The first part is an overview of self-healing concrete that summarises the basic concepts and the main advances produced in the last years. The second part is a critical discussion on the feasibility of self-healing concrete, its possibilities, current weaknesses, and challenges that need to be addressed in the coming years.

ACS Style

M. Roig-Flores; S. Formagini; P. Serna. Self-healing concrete-What Is it Good For? Materiales de Construcción 2021, 71, e237 .

AMA Style

M. Roig-Flores, S. Formagini, P. Serna. Self-healing concrete-What Is it Good For? Materiales de Construcción. 2021; 71 (341):e237.

Chicago/Turabian Style

M. Roig-Flores; S. Formagini; P. Serna. 2021. "Self-healing concrete-What Is it Good For?" Materiales de Construcción 71, no. 341: e237.

Journal article
Published: 01 June 2020 in Sustainability
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Autogenous healing is mainly produced by continuing hydration or carbonation. The aim of this research is to quantify the crack closing produced by autogenous healing for early-age concrete. This healing was evaluated for two crack size levels, 0.1 mm and 0.4 mm, under three healing conditions: water immersion, a humidity chamber, and wet/dry cycles. Crack closing was evaluated after 7, 14, 28 and 42 days under healing conditions. The internal status of the cracks was verified visually and using phenolphthalein. The results show that specimens stored in the humidity chamber did not experience healing, while specimens under wet/dry cycles and water immersion achieved the complete closing of small-sized cracks (under 0.15 mm). Autogenous healing showed higher speed under wet/dry cycles but higher final efficiency under water immersion. However, the inspection of the interior of the specimens showed that self-closing occurred mostly on the surface, and carbonation in the crack faces was only noticed very near the specimen’s surface. Additionally, this study proposes a preliminary strategy to model autogenous healing in concrete in terms of crack closing.

ACS Style

Marta Roig-Flores; Pedro Serna. Concrete Early-Age Crack Closing by Autogenous Healing. Sustainability 2020, 12, 4476 .

AMA Style

Marta Roig-Flores, Pedro Serna. Concrete Early-Age Crack Closing by Autogenous Healing. Sustainability. 2020; 12 (11):4476.

Chicago/Turabian Style

Marta Roig-Flores; Pedro Serna. 2020. "Concrete Early-Age Crack Closing by Autogenous Healing." Sustainability 12, no. 11: 4476.

Journal article
Published: 02 March 2020 in Construction and Building Materials
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The long term behavior of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) is analyzed in this study. The experimental campaign covered creep in compression and creep in flexure in cracked state. Three types of specimens were cast: cylindrical specimens (Ø100 × 200 mm) for compressive creep and shrinkage, and prismatic specimens type regular “R” (150 × 150 × 600 mm) and type slim “S” (150 × 40 × 600 mm) for flexural creep in cracked state. Specimens R were notched up to 50 mm in depth to weak the central section and then pre-cracked until 0.65 mm of Crack Mouth Opening Displacement (CMOD). Specimens S were pre-cracked unnotched until a loss of 50% of stiffness was observed. Flexural creep tests were performed during 270 days under load, and until 360 days the compressive tests. Measurements from three experimental sources were obtained: CMOD, compressive strains on top of prismatic specimens and longitudinal compressive strains in cylindrical specimens. Creep coefficients and parameters related with deferred deformations velocity were obtained from all three sources. Creep coefficients under flexure at 270 days ranged from 0.62 to 1.20 in the tensile zone, and from 0.72 to 0.90 in the compressive zone. Creep coefficient in compression at one year was 1.07, which is consistent with values found in the literature. Deferred deformations velocities at early ages were greater in specimens R than in specimens S, and a secondary creep stage was achieved in all specimens after 210 days of sustained loading.

ACS Style

A. Llano-Torre; J.R. Martí-Vargas; P. Serna. Flexural and compressive creep behavior of UHPFRC specimens. Construction and Building Materials 2020, 244, 118254 .

AMA Style

A. Llano-Torre, J.R. Martí-Vargas, P. Serna. Flexural and compressive creep behavior of UHPFRC specimens. Construction and Building Materials. 2020; 244 ():118254.

Chicago/Turabian Style

A. Llano-Torre; J.R. Martí-Vargas; P. Serna. 2020. "Flexural and compressive creep behavior of UHPFRC specimens." Construction and Building Materials 244, no. : 118254.

Journal article
Published: 28 December 2019 in Applied Sciences
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Reinforced concrete elements frequently suffer small cracks that are not relevant from the mechanical point of view, but they can be an entrance point for aggressive agents, such as oxygen, which could initiate the degradation processes. Fiber-Reinforced Concrete and especially Ultra High Performance Concrete increase the multi-cracking behavior, reducing the crack width and spacing. In this work, the oxygen availability of three types of concrete was compared at similar strain levels to evaluate the benefit of multi-cracking in the transport of oxygen. The types of concrete studied include traditional, High-Performance, and Ultra-High-Performance Fiber-Reinforced Concrete with and without nanofibers. To this purpose, reinforced concrete beams sized 150 × 100 × 750 mm3 were prepared with embedded stainless steel sensors that were located at three heights, which have also been validated through this work. These beams were pre-cracked in bending up to fixed strain levels. The results indicate that the sensors used were able to detect oxygen availability due to the presence of cracks and the detected differences between the studied concretes. Ultra High Performance Concrete in the cracked state displayed lower oxygen availability than the uncracked High Performance Concrete, demonstrating its potential higher durability, even when working in cracked state, thanks to the increased multi-cracking response.

ACS Style

Ana Martínez-Ibernón; Marta Roig-Flores; Josep Lliso-Ferrando; Eduardo J. Mezquida-Alcaraz; Manuel Valcuende; Pedro Serna. Influence of Cracking on Oxygen Transport in UHPFRC Using Stainless Steel Sensors. Applied Sciences 2019, 10, 239 .

AMA Style

Ana Martínez-Ibernón, Marta Roig-Flores, Josep Lliso-Ferrando, Eduardo J. Mezquida-Alcaraz, Manuel Valcuende, Pedro Serna. Influence of Cracking on Oxygen Transport in UHPFRC Using Stainless Steel Sensors. Applied Sciences. 2019; 10 (1):239.

Chicago/Turabian Style

Ana Martínez-Ibernón; Marta Roig-Flores; Josep Lliso-Ferrando; Eduardo J. Mezquida-Alcaraz; Manuel Valcuende; Pedro Serna. 2019. "Influence of Cracking on Oxygen Transport in UHPFRC Using Stainless Steel Sensors." Applied Sciences 10, no. 1: 239.

Journal article
Published: 12 December 2019 in Materials and Structures
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The article [Structural effects of FRC creep], written by [Giovanni Plizzari, Pedro Serna], was originally published electronically on the publisher’s Internet portal (currently SpringerLink) on 3 December 2018 without open access.

ACS Style

Giovanni Plizzari; Pedro Serna. Correction to: Structural effects of FRC creep. Materials and Structures 2019, 52, 131 .

AMA Style

Giovanni Plizzari, Pedro Serna. Correction to: Structural effects of FRC creep. Materials and Structures. 2019; 52 (6):131.

Chicago/Turabian Style

Giovanni Plizzari; Pedro Serna. 2019. "Correction to: Structural effects of FRC creep." Materials and Structures 52, no. 6: 131.

Journal article
Published: 03 December 2018 in Materials and Structures
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Research studies in the last 20 years allowed to obtain reliable rules for designing structures made of fiber reinforced concrete (FRC). However, design aspects like the long-term behavior of FRC, especially when synthetic fibers are adopted, require further research. Long-term behavior includes aging and creep. Aging represent the change of fiber properties into the concrete environment, which may reduce the structural bearing capacity; when present, it is an important issue for the structural safety, especially when fibers are the only reinforcement. Aging of fibers must be proven by experimental tests. Creep is a complex phenomenon, roughly considered by building codes even for traditional reinforced concrete (RC) structures. The introduction of fibers do not change anything in concrete matrix and, before cracking, in the material concrete creep behavior is not expected any change. After cracking, the structural effect of FRC creep depends on the degree of structural redundancy and on the presence of rebars since creep produces a stress redistribution in the structure or from FRC to the rebars. When FRC post-cracking resistance is necessary for equilibrium requirements, in structures with cracked sections in service conditions the structural deferred response has to be analyzed by considering the FRC creep behavior. When FRC is used for resisting secondary actions and rebars are present for equilibrium requirements, the response of a FRC element (with rebars and fibers) will be identical to a conventional RC; FRC contributes by controlling the crack development under both short and long term loading.

ACS Style

Giovanni Plizzari; Pedro Serna. Structural effects of FRC creep. Materials and Structures 2018, 51, 167 .

AMA Style

Giovanni Plizzari, Pedro Serna. Structural effects of FRC creep. Materials and Structures. 2018; 51 (6):167.

Chicago/Turabian Style

Giovanni Plizzari; Pedro Serna. 2018. "Structural effects of FRC creep." Materials and Structures 51, no. 6: 167.

Journal article
Published: 26 November 2018 in Construction and Building Materials
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This paper presents an experimental study on creep behavior of cracked Fiber Reinforced Concrete (FRC). To this end, a conventional strength concrete incorporating hooked-end steel fibers was used. In order to represent service conditions, specimens under low sustained loads with small pre-cracking damage (lower than 0.5 mm) were tested and analyzed. Taking as a reference the residual stress fR,1 determined according to EN 14651:2007, different stress levels for the creep tests were applied: 25%, 35% and 45% of fR,1. For the pre-cracking damage, several initial crack openings were considered: 0.05, 0.1, 0.2, 0.3 and 0.5 mm. The specimens were tested under a four-point bending scheme for 180 days in controlled environmental conditions. The Crack Opening Rate (COR) was used as parameter to characterize the creep behavior of cracked FRC. After the creep tests, conventional flexural tests were carried out to evaluate the residual capacity and to survey the fiber density of each specimen. Both the stress level and the initial crack opening factors affected significantly the creep behavior. In all cases, the measured increases in crack openings resulted compatible with service conditions, and no negative effects on the residual post-creep behavior were observed. An expression to predict Crack Opening Rate values is proposed.

ACS Style

D.H. Monetti; A. Llano-Torre; M.C. Torrijos; G. Giaccio; R. Zerbino; J.R. Martí-Vargas; P. Serna. Long-term behavior of cracked fiber reinforced concrete under service conditions. Construction and Building Materials 2018, 196, 649 -658.

AMA Style

D.H. Monetti, A. Llano-Torre, M.C. Torrijos, G. Giaccio, R. Zerbino, J.R. Martí-Vargas, P. Serna. Long-term behavior of cracked fiber reinforced concrete under service conditions. Construction and Building Materials. 2018; 196 ():649-658.

Chicago/Turabian Style

D.H. Monetti; A. Llano-Torre; M.C. Torrijos; G. Giaccio; R. Zerbino; J.R. Martí-Vargas; P. Serna. 2018. "Long-term behavior of cracked fiber reinforced concrete under service conditions." Construction and Building Materials 196, no. : 649-658.

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

F. Ortiz Navas; Juan Navarro-Gregori; G. Leiva Herdocia; P. Serna; Estefanía Cuenca. An experimental study on the shear behaviour of reinforced concrete beams with macro-synthetic fibres. Construction and Building Materials 2018, 169, 888 -899.

AMA Style

F. Ortiz Navas, Juan Navarro-Gregori, G. Leiva Herdocia, P. Serna, Estefanía Cuenca. An experimental study on the shear behaviour of reinforced concrete beams with macro-synthetic fibres. Construction and Building Materials. 2018; 169 ():888-899.

Chicago/Turabian Style

F. Ortiz Navas; Juan Navarro-Gregori; G. Leiva Herdocia; P. Serna; Estefanía Cuenca. 2018. "An experimental study on the shear behaviour of reinforced concrete beams with macro-synthetic fibres." Construction and Building Materials 169, no. : 888-899.

Conference paper
Published: 01 July 2017 in Proceedings of International Structural Engineering and Construction
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According to the Civil Engineering Bachelor Degree program, students should have acquired, among other knowledge, the skill: “to understand and assume the ethical and professional responsibility of the activity of the Civil Engineer”. In order to do this, they can take an optional subject (not all the students enroll), called “ethics of civil engineering” and also the transversal skill “ethical, environmental and professional responsibility” is taught in several subjects of the degree program. This communication presents the methodology used in the subject “Constructions Materials” of second degree course to introduce this transversal skill. The great achievement of this methodology is to have this transversal skill present in all work sessions in the classroom, so the skill becomes part of the daily work of the student. Moreover, it presents additional advantages for the evaluation of the skill thanks to the continuous acquisition of evidence.

ACS Style

Ester Gimenez-Carbo; Hugo Coll; Mª Jose Pelufo; Guillermo Noguera; Pedro Serna. IDENTIFYING BAD PRACTICES: A WAY TO INTRODUCE ETHICS IN THE CLASSROOM. Proceedings of International Structural Engineering and Construction 2017, 4, 1 .

AMA Style

Ester Gimenez-Carbo, Hugo Coll, Mª Jose Pelufo, Guillermo Noguera, Pedro Serna. IDENTIFYING BAD PRACTICES: A WAY TO INTRODUCE ETHICS IN THE CLASSROOM. Proceedings of International Structural Engineering and Construction. 2017; 4 (1):1.

Chicago/Turabian Style

Ester Gimenez-Carbo; Hugo Coll; Mª Jose Pelufo; Guillermo Noguera; Pedro Serna. 2017. "IDENTIFYING BAD PRACTICES: A WAY TO INTRODUCE ETHICS IN THE CLASSROOM." Proceedings of International Structural Engineering and Construction 4, no. 1: 1.

Book chapter
Published: 24 December 2016 in RILEM Bookseries
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This paper reports the multivariate analysis of experimental results from more than one hundred FRC prismatic specimens tested under sustained flexural loads for at least 90 days, collected from previously published sources. Principal Component Analysis was used to minimise the number of variables in the modelling process while compromising the minimum amount of information. The creep parameters analysed were the creep coefficients at 14, 30, and 90 days and the corresponding crack opening rates. They were related to the following factors: concrete compressive strength, residual load-bearing capacity in flexure, fibre material, and load. Multiple linear regression was used for the modelling of these relationships. Higher levels of flexural toughness were found to significantly reduce the variability of all creep parameters. Differences in fibre material were detected to introduce important differences in interaction with other factors, especially the load ratio, which was attributed to the association between the range of flexural toughness to be expected and the type of fibres used.

ACS Style

Emilio Garcia-Taengua; Aitor Llano-Torre; Jose R. Marti-Vargas; Pedro Serna. Effect of Residual Strength Parameters on FRC Flexural Creep: Multivariate Analysis. RILEM Bookseries 2016, 141 -153.

AMA Style

Emilio Garcia-Taengua, Aitor Llano-Torre, Jose R. Marti-Vargas, Pedro Serna. Effect of Residual Strength Parameters on FRC Flexural Creep: Multivariate Analysis. RILEM Bookseries. 2016; ():141-153.

Chicago/Turabian Style

Emilio Garcia-Taengua; Aitor Llano-Torre; Jose R. Marti-Vargas; Pedro Serna. 2016. "Effect of Residual Strength Parameters on FRC Flexural Creep: Multivariate Analysis." RILEM Bookseries , no. : 141-153.

Book chapter
Published: 24 December 2016 in RILEM Bookseries
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The influence of fibre reinforcement on the long-term behaviour of cracked concrete is analysed in this work by means of a creep test. Nine concrete mixes were prepared (7 SFRC’s and 2 conventional RCs) based on two basic mix designs. Concretes type I were conceived for structural pre-cast applications and concretes type II reproduce a general purpose. Fibre dosages and conventional reinforcements were varied to represent a wide spectrum of post-peak flexural responses. In all cases with fibre reinforcement steel fibres were used. Conventional RC specimens were reinforced with two steel rebars. In addition to the variables of mix design of concrete, there are two significant variables related to the creep test: the pre-crack opening level (CMODpn) and the stress level (I c ) sustained during the test. Creep tests were performed by applying a constant flexural load on notched pre-cracked specimens and controlling crack opening evolution. Some of the specimens developed a sudden increase of crack opening deformations during the creep test. Creep coefficients and Crack Opening Rates were calculated and analysed. Creep coefficients show significant dependence on the analysed variables. The results of this experimental campaign show that creep on SFRC specimens may be similar to a conventional RC.

ACS Style

Aitor Llano-Torre; Samuel Eduardo Arango; Emilio Garcia-Taengua; José Rocío Martí-Vargas; Pedro Serna. Influence of Fibre Reinforcement on the Long-Term Behaviour of Cracked Concrete. RILEM Bookseries 2016, 195 -209.

AMA Style

Aitor Llano-Torre, Samuel Eduardo Arango, Emilio Garcia-Taengua, José Rocío Martí-Vargas, Pedro Serna. Influence of Fibre Reinforcement on the Long-Term Behaviour of Cracked Concrete. RILEM Bookseries. 2016; ():195-209.

Chicago/Turabian Style

Aitor Llano-Torre; Samuel Eduardo Arango; Emilio Garcia-Taengua; José Rocío Martí-Vargas; Pedro Serna. 2016. "Influence of Fibre Reinforcement on the Long-Term Behaviour of Cracked Concrete." RILEM Bookseries , no. : 195-209.

Journal article
Published: 01 July 2016 in Construction and Building Materials
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This paper analyzes the self-healing properties of early-age concretes, engineered using a crystalline admixture (4% by the weight of cement), by measuring the permeability of cracked specimens and their crack width. Two concrete classes (C30/37 and C45/55) and three healing exposure conditions have been investigated: water immersion at 15 °C, at 30 °C and wet/dry cycles. Specimens were pre-cracked at 2 days, to values of crack width in the range of 0.10–0.40 mm. The results show almost perfect healing capability for specimens healed under water at 30 °C, better than for specimens healed under water at 15 °C, while insufficient for the wet/dry exposure

ACS Style

M. Roig-Flores; F. Pirritano; Pedro Serna; Liberato Ferrara. Effect of crystalline admixtures on the self-healing capability of early-age concrete studied by means of permeability and crack closing tests. Construction and Building Materials 2016, 114, 447 -457.

AMA Style

M. Roig-Flores, F. Pirritano, Pedro Serna, Liberato Ferrara. Effect of crystalline admixtures on the self-healing capability of early-age concrete studied by means of permeability and crack closing tests. Construction and Building Materials. 2016; 114 ():447-457.

Chicago/Turabian Style

M. Roig-Flores; F. Pirritano; Pedro Serna; Liberato Ferrara. 2016. "Effect of crystalline admixtures on the self-healing capability of early-age concrete studied by means of permeability and crack closing tests." Construction and Building Materials 114, no. : 447-457.

Journal article
Published: 01 June 2016 in Construction and Building Materials
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ACS Style

Juan Navarro-Gregori; Eduardo J. Mezquida-Alcaraz; Pedro Serna-Ros; Javier Echegaray-Oviedo. Experimental study on the steel-fibre contribution to concrete shear behaviour. Construction and Building Materials 2016, 112, 100 -111.

AMA Style

Juan Navarro-Gregori, Eduardo J. Mezquida-Alcaraz, Pedro Serna-Ros, Javier Echegaray-Oviedo. Experimental study on the steel-fibre contribution to concrete shear behaviour. Construction and Building Materials. 2016; 112 ():100-111.

Chicago/Turabian Style

Juan Navarro-Gregori; Eduardo J. Mezquida-Alcaraz; Pedro Serna-Ros; Javier Echegaray-Oviedo. 2016. "Experimental study on the steel-fibre contribution to concrete shear behaviour." Construction and Building Materials 112, no. : 100-111.

Journal article
Published: 01 April 2016 in Composites Part B: Engineering
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ACS Style

Juan Ángel López; Pedro Serna; Juan Navarro-Gregori; Hugo Coll. A simplified five-point inverse analysis method to determine the tensile properties of UHPFRC from unnotched four-point bending tests. Composites Part B: Engineering 2016, 91, 189 -204.

AMA Style

Juan Ángel López, Pedro Serna, Juan Navarro-Gregori, Hugo Coll. A simplified five-point inverse analysis method to determine the tensile properties of UHPFRC from unnotched four-point bending tests. Composites Part B: Engineering. 2016; 91 ():189-204.

Chicago/Turabian Style

Juan Ángel López; Pedro Serna; Juan Navarro-Gregori; Hugo Coll. 2016. "A simplified five-point inverse analysis method to determine the tensile properties of UHPFRC from unnotched four-point bending tests." Composites Part B: Engineering 91, no. : 189-204.

Journal article
Published: 01 February 2016 in Construction and Building Materials
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Steel fiber reinforced concrete (SFRC) has been increasingly used during recent years. Regarding bond of rebars to concrete, fibers provide passive confinement and improve bond capacity in terms of bond strength and, more importantly, toughness. An extensive experimental programme has been carried out, and SFRC specimens with embedded rebars have been subjected to the Pull Out Test to obtain the bond stress–slip curves, retaining the bond strength and the area under the curve as measures of the bond capacity of concrete. The following parameters were considered: concrete compressive strength (30–50 MPa), rebar diameter (8–20 mm), concrete cover (between 30 mm and 5 times rebar diameter), fiber content (up to 70 kg/m3), and the slenderness and length of the steel fibers used. Predictive equations have been obtained to relate the experimental results to the factors considered, and the trends observed have been analyzed and discussed.

ACS Style

E. Garcia-Taengua; J.R. Martí-Vargas; P. Serna. Bond of reinforcing bars to steel fiber reinforced concrete. Construction and Building Materials 2016, 105, 275 -284.

AMA Style

E. Garcia-Taengua, J.R. Martí-Vargas, P. Serna. Bond of reinforcing bars to steel fiber reinforced concrete. Construction and Building Materials. 2016; 105 ():275-284.

Chicago/Turabian Style

E. Garcia-Taengua; J.R. Martí-Vargas; P. Serna. 2016. "Bond of reinforcing bars to steel fiber reinforced concrete." Construction and Building Materials 105, no. : 275-284.

Conference paper
Published: 17 September 2015 in CONCREEP 10
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The long term behaviour of Fibre Reinforced Concrete on cracked state is an important research topic, since it is essential to understand this property when using FRC as structural material. The RILEM CCF Technical Committee was created in order to focus the efforts of all researchers on the better understanding of creep behaviour. One of the objectives of the TC was to compile a global database of results of creep test in order to analyse this phenomenon in an overall review. In order to achieve a complete enough database, several minimal variables and parameters data have been proposed on this first attempt. This first database of creep results is based on flexural creep test with different environmental conditions. In future, it can be extended to other testing methodologies. Thanks to this database, first conclusions start reveal those variables which have a higher significance level in creep deferred behaviour.

ACS Style

Pedro Serna; Aitor Llano-Torre; Emilio Garcia-Taengua; J. R. Martí-Vargas. Database on the Long-Term Behaviour of FRC: A Useful Tool to Achieve Overall Conclusions. CONCREEP 10 2015, 1 .

AMA Style

Pedro Serna, Aitor Llano-Torre, Emilio Garcia-Taengua, J. R. Martí-Vargas. Database on the Long-Term Behaviour of FRC: A Useful Tool to Achieve Overall Conclusions. CONCREEP 10. 2015; ():1.

Chicago/Turabian Style

Pedro Serna; Aitor Llano-Torre; Emilio Garcia-Taengua; J. R. Martí-Vargas. 2015. "Database on the Long-Term Behaviour of FRC: A Useful Tool to Achieve Overall Conclusions." CONCREEP 10 , no. : 1.

Journal article
Published: 01 July 2015 in Construction and Building Materials
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The aim of this study is analyzing the self-healing effect of a crystalline admixture in four types of environmental exposure comparing with a reference concrete. Healing was studied by means of permeability tests on cracked specimens and physical closing of the crack was observed by optic microscope and quantified through crack geometrical parameters. The studied crack openings were under 300 μm and the time set for healing was 42 days. The results show a different healing behavior depending on the exposure and the presence of the crystalline admixture, demonstrating that the presence of water is necessary for the healing reactions

ACS Style

Marta Roig-Flores; S. Moscato; Pedro Serna; Liberato Ferrara. Self-healing capability of concrete with crystalline admixtures in different environments. Construction and Building Materials 2015, 86, 1 -11.

AMA Style

Marta Roig-Flores, S. Moscato, Pedro Serna, Liberato Ferrara. Self-healing capability of concrete with crystalline admixtures in different environments. Construction and Building Materials. 2015; 86 ():1-11.

Chicago/Turabian Style

Marta Roig-Flores; S. Moscato; Pedro Serna; Liberato Ferrara. 2015. "Self-healing capability of concrete with crystalline admixtures in different environments." Construction and Building Materials 86, no. : 1-11.