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This paper aimed to evaluate the long-term compressive strength development of the sewage sludge ash/metakaolin (SSA/MK)-based geopolymer. SSA/MK-based geopolymeric mortars and pastes were produced at 25ºC with different SSA contents (0 - 30 wt.%). Compressive strength tests were run within the 3-720 curing days range. A physicochemical characterisation (X-ray diffraction and scanning electron microscopy) was performed in geopolymeric pastes. All the geopolymeric mortars presented a compressive strength gain with curing time. The mortars with all the SSA evaluated contents (10, 20, 30 wt.%) developed a compressive strength over 40 MPa after 720 curing days at 25ºC. The maximum compressive strength of the mortars with SSA was approximately 61 MPa (10 wt.% of SSA), similarly to the reference mortar (100% MK-based geopolymer). The microstructure analyses showed that the SSA/MK-based geopolymer presented a dense microstructure with N-A-S-H gel formation.
D. Istuque; L. Soriano; M.V. Borrachero; J. Payá; J.L. Akasaki; J.L.P. Melges; M.M. Tashima. Evaluation of the long-term compressive strength development of the sewage sludge ash/metakaolin-based geopolymer. Materiales de Construcción 2021, 71, e254 -e254.
AMA StyleD. Istuque, L. Soriano, M.V. Borrachero, J. Payá, J.L. Akasaki, J.L.P. Melges, M.M. Tashima. Evaluation of the long-term compressive strength development of the sewage sludge ash/metakaolin-based geopolymer. Materiales de Construcción. 2021; 71 (343):e254-e254.
Chicago/Turabian StyleD. Istuque; L. Soriano; M.V. Borrachero; J. Payá; J.L. Akasaki; J.L.P. Melges; M.M. Tashima. 2021. "Evaluation of the long-term compressive strength development of the sewage sludge ash/metakaolin-based geopolymer." Materiales de Construcción 71, no. 343: e254-e254.
Resource recovery from waste is one of the most important ways to implement the so-called circular economy, and the use of alkali activated materials can become an alternative for traditional PC-based materials. These types of materials are based on waste resources involving a lower carbon footprint and present similar or high properties and good durability compared to that Portland cement (PC). This research work proposes using new waste generated in different types of industries. Four waste types were employed: fluid catalytic cracking residue (FCC) from the petrochemical industry; ceramic sanitary ware (CSW) from the construction industry; rice husk ash (RHA); diatomaceous waste from beer filtration (DB) (food industry). FCC and CSW were employed as precursor materials, and mixtures of both showed good properties of the obtained alkali activated materials generated with commercial products as activators (NaOH/waterglass). RHA and DB were herein used as an alternative silica source to prepare the alkaline activating solution. Mechanical behavior was studied by the compressive strength development of mortars. The corresponding pastes were characterized by X-ray diffraction, thermogravimetric analysis, and microscopy studies. The results were satisfactory, and demonstrated that employing these alternative activators from waste produces alkali activated materials with good mechanical properties, which were sometimes similar or even better than those obtained with commercial reagents.
Jordi Payá; Lourdes Soriano; Alba Font; Maria Borrachero Rosado; Javier Nande; Jose Monzo Balbuena. Reuse of Industrial and Agricultural Waste in the Fabrication of Geopolymeric Binders: Mechanical and Microstructural Behavior. Materials 2021, 14, 2089 .
AMA StyleJordi Payá, Lourdes Soriano, Alba Font, Maria Borrachero Rosado, Javier Nande, Jose Monzo Balbuena. Reuse of Industrial and Agricultural Waste in the Fabrication of Geopolymeric Binders: Mechanical and Microstructural Behavior. Materials. 2021; 14 (9):2089.
Chicago/Turabian StyleJordi Payá; Lourdes Soriano; Alba Font; Maria Borrachero Rosado; Javier Nande; Jose Monzo Balbuena. 2021. "Reuse of Industrial and Agricultural Waste in the Fabrication of Geopolymeric Binders: Mechanical and Microstructural Behavior." Materials 14, no. 9: 2089.
The use of almond-shell biomass ash (ABA) as an alternative component to the commercial reagents used in the activation of blast furnace slag (BFS) systems is investigated. The presence in its chemical composition of a high content of K2O indicates that it can alkalinize the medium. 100% waste-based mixtures ABA/BFS were studied by micro- and macrostructural tests. A compressive strength of 44 MPa was achieved by the mortar with 25% ABA addition cured for 7 days at 65 °C. The microstructural analysis showed the formation of slightly different C(K)-A-S-H gels to those formed when using KOH. The use of ABA in BFS mortars is shown as a greener alternative for construction materials because the replacement of synthetic chemical reagents that produced around a 75–80% of reduction in the values of kgCO2eq/m3 material.
Lourdes Soriano; Alba Font; Mauro M. Tashima; José Monzó; Maria Victoria Borrachero; Thaís Bonifácio; Jordi Payá. Almond-shell biomass ash (ABA): A greener alternative to the use of commercial alkaline reagents in alkali-activated cement. Construction and Building Materials 2021, 290, 123251 .
AMA StyleLourdes Soriano, Alba Font, Mauro M. Tashima, José Monzó, Maria Victoria Borrachero, Thaís Bonifácio, Jordi Payá. Almond-shell biomass ash (ABA): A greener alternative to the use of commercial alkaline reagents in alkali-activated cement. Construction and Building Materials. 2021; 290 ():123251.
Chicago/Turabian StyleLourdes Soriano; Alba Font; Mauro M. Tashima; José Monzó; Maria Victoria Borrachero; Thaís Bonifácio; Jordi Payá. 2021. "Almond-shell biomass ash (ABA): A greener alternative to the use of commercial alkaline reagents in alkali-activated cement." Construction and Building Materials 290, no. : 123251.
Rice husk ash is one of the most widely studied biomass ashes used in pozzolanic addition. Given its lower silica content, rice straw ash (RSA) has been explored less often, despite the fact that, according to the United Nations Food and Agriculture Organization (FAO), rice straw (RS) production is estimated at 600 million tons/year. In this work, RSA was physically and chemically characterized, and its pozzolanic properties were assessed. A controlled conditioning, burning, homogenization and grinding procedure was carried out to obtain RSA from RS. Chemical composition, insoluble residue, reactive silica, chloride content and particle size distribution were assessed for ash characterization. To determine RSA pozzolanicity, Frattini, electrical conductivity and pH measurements in an aqueous suspension of hydrated CH/RSA mixtures were obtained. Portland cement (PC) mortars with 15% and 30% RSA substitutions evaluated. The mechanical tests showed specimens with a strength activity index up to 90% and 80% with 15% and 30% RSA, respectively, after 3 days, and these values grew to 107–109% after 90 curing days.
Samantha Hidalgo; Lourdes Soriano; José Monzó; Jordi Payá; Alba Font; Mª Victoria Borrachero. Evaluation of Rice Straw Ash as a Pozzolanic Addition in Cementitious Mixtures. Applied Sciences 2021, 11, 773 .
AMA StyleSamantha Hidalgo, Lourdes Soriano, José Monzó, Jordi Payá, Alba Font, Mª Victoria Borrachero. Evaluation of Rice Straw Ash as a Pozzolanic Addition in Cementitious Mixtures. Applied Sciences. 2021; 11 (2):773.
Chicago/Turabian StyleSamantha Hidalgo; Lourdes Soriano; José Monzó; Jordi Payá; Alba Font; Mª Victoria Borrachero. 2021. "Evaluation of Rice Straw Ash as a Pozzolanic Addition in Cementitious Mixtures." Applied Sciences 11, no. 2: 773.
This work studies the effect of nanosilica (NS) on the rheology of cement paste by comparing it with two high specific surface area silicas: silica fume (SF) and pyrogenic silica (PS). Portland cement pastes were produced with different water-to-cementing material ratios and different solid substitutions of cement by silica. Water demand, setting time, and rheology tests were performed. Results showed that NS and SF decreased plastic viscosity, while PS increased it. Only PS was found to have an effect on yield stress. NS showed the most decreasing effect on viscosity, regardless of its higher water demand. It was concluded that the behavior of pastes containing NS and SF is governed by the “ball-bearing” effect from silica particles, by their agglomeration degree, and their impact on the solid volume fraction. The behavior of pastes containing PS is governed by its ability to absorb a portion of the mixing water.
J. I. Tobón; O. Mendoza; O. J. Restrepo; M. V. Borrachero; J. Payá. Effect of different high surface area silicas on the rheology of cement paste. Materiales de Construcción 2020, 70, 231 .
AMA StyleJ. I. Tobón, O. Mendoza, O. J. Restrepo, M. V. Borrachero, J. Payá. Effect of different high surface area silicas on the rheology of cement paste. Materiales de Construcción. 2020; 70 (340):231.
Chicago/Turabian StyleJ. I. Tobón; O. Mendoza; O. J. Restrepo; M. V. Borrachero; J. Payá. 2020. "Effect of different high surface area silicas on the rheology of cement paste." Materiales de Construcción 70, no. 340: 231.
The objective of this study was to evaluate the effects of potassium extraction on the pozzolanicity of sugar cane bagasse ash (SCBA), with the aim of producing reactive ash for use in cementitious composites. The sugar cane bagasse ashes were produced at 600 °C for 60 min, with a heating rate of 4 °C/min. The ashes were then ground and washed for potassium extraction. In order to assess the ash behaviour before and after potassium extraction, the following procedures were performed: energy-dispersive spectroscopy (EDS), loss on ignition (LOI), particle size distribution, x-ray powder diffraction (XRD), x-ray diffraction in calcium hydroxide paste, analysis of lime fixation by thermogravimetry, and evaluation of pozzolanic reactivity analyses. Results show that the extraction of potassium, increases the concentration of silica causing a greater pozzolanic reactivity of the ashes.
Gabriela Pitolli Lyra; María Victoria Borrachero; Lourdes Soriano; Jordi Payá; João Adriano Rossignolo. Comparison of original and washed pure sugar cane bagasse ashes as supplementary cementing materials. Construction and Building Materials 2020, 272, 122001 .
AMA StyleGabriela Pitolli Lyra, María Victoria Borrachero, Lourdes Soriano, Jordi Payá, João Adriano Rossignolo. Comparison of original and washed pure sugar cane bagasse ashes as supplementary cementing materials. Construction and Building Materials. 2020; 272 ():122001.
Chicago/Turabian StyleGabriela Pitolli Lyra; María Victoria Borrachero; Lourdes Soriano; Jordi Payá; João Adriano Rossignolo. 2020. "Comparison of original and washed pure sugar cane bagasse ashes as supplementary cementing materials." Construction and Building Materials 272, no. : 122001.
Worldwide cement production is around 4.2 billion tons, and the fabrication of one ton of ordinary Portland cement emits around 900 kg of CO2. Blast furnace slag (BFS) is a byproduct used to produce alkali-activated materials (AAM). BFS production was estimated at about 350 million tons in 2018, and the BFS reuse rate in construction materials of developing countries is low. AAM can reduce CO2 emissions in relation to Portland cement materials: Its use in construction would be a golden opportunity for developing countries in forthcoming decades. The present research aims to formulate AAM destined for future applications in developing countries. Two activators were used: NaOH, Na2CO3, and a mixture of both. The results showed that compressive strengths within the 42–56 MPa range after 28 curing days were obtained for the Na2CO3-activated mortars. The characterization analysis confirmed the presence of hydrotalcite, carbonated phases, CSH and CASH. The economic study showed that Na2CO3 was the cheapest activator in terms of the relative cost per ton and MPa of manufactured mortars. Finally, the environmental benefits of mortars based on this reagent were evidenced, and, in terms of kgCO2 emissions per ton and MPa, the mortars with Na2CO3 yielded 50% lower values than with NaOH.
Nabil Bella; Edwin Gudiel; Lourdes Soriano; Alba Font; María Victoria Borrachero; Jordi Paya; José Maria Monzó. Formulation of Alkali-Activated Slag Binder Destined for Use in Developing Countries. Applied Sciences 2020, 10, 9088 .
AMA StyleNabil Bella, Edwin Gudiel, Lourdes Soriano, Alba Font, María Victoria Borrachero, Jordi Paya, José Maria Monzó. Formulation of Alkali-Activated Slag Binder Destined for Use in Developing Countries. Applied Sciences. 2020; 10 (24):9088.
Chicago/Turabian StyleNabil Bella; Edwin Gudiel; Lourdes Soriano; Alba Font; María Victoria Borrachero; Jordi Paya; José Maria Monzó. 2020. "Formulation of Alkali-Activated Slag Binder Destined for Use in Developing Countries." Applied Sciences 10, no. 24: 9088.
Soil stabilization using cementing materials is a well-known procedure for earth-based building blocks preparation. For the selected binding materials, innovation usually focuses on low carbon systems, many of which are based on alkaline activation. In the present paper, blast furnace slag (BFS) is used as a mineral precursor, and the innovative alkali activator was olive stone biomass ash (OBA). This means that the most important component in CO2 emissions terms, which is the alkali activator, has been replaced with a greener alternative: OBA. The OBA/BFS mixture was used to prepare compacted dolomitic soil blocks. These specimens were mechanically characterized by compression, and water strength coefficient and water absorption were assessed. The microstructure of blocks and the formation of cementing hydrates were analyzed by field emission scanning electron microscopy and thermogravimetry, respectively. The final compressive strength of the 120-day cured blocks was 27.8 MPa. It was concluded that OBA is a sustainable alkali activator alternative for producing BFS-stabilized soil-compacted blocks: CO2 emissions were 3.3 kgCO2/ton of stabilized soil, which is 96% less than that for ordinary Portland cement (OPC) stabilization.
Jordi Payá; José Monzó; Josefa Roselló; María Borrachero; Alba Font; Lourdes Soriano. Sustainable Soil-Compacted Blocks Containing Blast Furnace Slag (BFS) Activated with Olive Stone BIOMASS Ash (OBA). Sustainability 2020, 12, 9824 .
AMA StyleJordi Payá, José Monzó, Josefa Roselló, María Borrachero, Alba Font, Lourdes Soriano. Sustainable Soil-Compacted Blocks Containing Blast Furnace Slag (BFS) Activated with Olive Stone BIOMASS Ash (OBA). Sustainability. 2020; 12 (23):9824.
Chicago/Turabian StyleJordi Payá; José Monzó; Josefa Roselló; María Borrachero; Alba Font; Lourdes Soriano. 2020. "Sustainable Soil-Compacted Blocks Containing Blast Furnace Slag (BFS) Activated with Olive Stone BIOMASS Ash (OBA)." Sustainability 12, no. 23: 9824.
This paper proposes binary and ternary combinations of sewage sludge ash (SSA) with fly ash (FA), marble dust (MD) and rice husk ash (RHA) as partial replacements of Portland cement in concretes with a similar dosage to that used in precast blocks, with very dry consistency. Several physical-mechanical tests were carried out on concrete specimens with curing ages of 28 and 90 days: density, water absorption, capillary water absorption, ultrasonic pulse velocity and compressive strength. The combinations of residues significantly improve the properties of the cementitious systems: 30% replacement of Portland cement provides strength values similar to the reference sample, showing the synergetic effects of the combination of the mineral additions. The significance of this research relies on the combined use of the mineral additions as well as the use of them for the precast block industry. The results show synergies among the additions and even that some of them showed relevant improvements when they are used in combination, performing better than when used individually.
Francisco Baeza-Brotons; Jordi Payá; Oscar Galao; Marcos G. Alberti; Pedro Garcés. Concrete for Precast Blocks: Binary and Ternary Combination of Sewage Sludge Ash with Diverse Mineral Residue. Materials 2020, 13, 4634 .
AMA StyleFrancisco Baeza-Brotons, Jordi Payá, Oscar Galao, Marcos G. Alberti, Pedro Garcés. Concrete for Precast Blocks: Binary and Ternary Combination of Sewage Sludge Ash with Diverse Mineral Residue. Materials. 2020; 13 (20):4634.
Chicago/Turabian StyleFrancisco Baeza-Brotons; Jordi Payá; Oscar Galao; Marcos G. Alberti; Pedro Garcés. 2020. "Concrete for Precast Blocks: Binary and Ternary Combination of Sewage Sludge Ash with Diverse Mineral Residue." Materials 13, no. 20: 4634.
The microstructural features of heterogeneous and porous materials give rise to unique non-linear dynamic behaviour. The purpose of this work is to investigate the dynamic response of thermally damaged concrete specimens measured by two different techniques: Non-linear Impact Resonance Acoustic Spectroscopy (NIRAS) and new Flipped Accumulative Non-linear Single Impact Acoustic Spectroscopy (FANSIRAS). Specimens were characterised in two different dynamic condition states of the material: relaxed and conditioned. The specimen’s relaxed state indicates that no previous dynamic excitation event ocurred. The conditioned state denotes that the specimen has been dynamically tested before. The NIRAS results show that the non-linear material parameters, αf and αQ, are affected by their previous dynamic history (its conditioning). The recently proposed algorithm, FANSIRAS, extracts from a single resonant signal equivalent results to NIRAS when the specimen is conditioned. In this situation, both parameters αf and αQ were equivalent. The results suggest that new NDT parameters based on non-linear hysteretic parameters can quantify the damage level of thermally treated mortar specimens.
A. Carrión; V. Genovés; G. Pérez; J. Bittner; J.S. Popovics; J. Payá; J. Gosálbez. Effects of slow dynamics and conditioning on non-linear hysteretic material assessment using impact resonance acoustic spectroscopy. Mechanical Systems and Signal Processing 2020, 150, 107273 .
AMA StyleA. Carrión, V. Genovés, G. Pérez, J. Bittner, J.S. Popovics, J. Payá, J. Gosálbez. Effects of slow dynamics and conditioning on non-linear hysteretic material assessment using impact resonance acoustic spectroscopy. Mechanical Systems and Signal Processing. 2020; 150 ():107273.
Chicago/Turabian StyleA. Carrión; V. Genovés; G. Pérez; J. Bittner; J.S. Popovics; J. Payá; J. Gosálbez. 2020. "Effects of slow dynamics and conditioning on non-linear hysteretic material assessment using impact resonance acoustic spectroscopy." Mechanical Systems and Signal Processing 150, no. : 107273.
Reusing ceramic waste as a pozzolanic admixture may offer environmental benefits as it allows the reduction in the consumption of natural resources and energy, and the reduction of CO2 emissions associated with Portland cement (PC) production, while valorising waste materials with a long biodegradation period. This paper assessed the pozzolanic activity of three different ceramic waste types: red clay bricks (RCB), ceramic tiles (TCW) and ceramic sanitary-ware (CSW). After adapting their particle size by crushing and milling, each was used to replace 0 to 50 wt% PC (CEM I 42.5 R type). The milled powders were characterised by laser diffraction, field emission scanning electron microscopy (FESEM), X-ray fluorescence (XRF) and X-ray diffraction (XRD), and consistency and setting time tests were used to investigate the fresh behaviour of the ceramic waste/PC blended pastes. A basic sustainability analysis was performed, and the pozzolanic activity of RCB, TCW and CSW was assessed by compressive strength tests (performed in mortars cured at room temperature from 3 to 365 days) and microstructural analyses (thermogravimetry, XRD and FESEM performed in the pastes cured at 20 °C for 28 and 90 days). The pozzolanic reaction of these waste materials improved with curing time, and all the mortars prepared with up to 25 wt% RCB, TCW or CSW met the mechanical requirements set out for coal fly ashes, whatever the ceramic waste type used. Among them, these results open up the possibility of partially replacing PC with the closest available ceramic waste, which would reduce the CO2 emissions and economic cost deriving from transporting waste.
A.M. Pitarch; L. Reig; A.E. Tomás; G. Forcada; L. Soriano; M.V. Borrachero; J. Payá; J.M. Monzó. Pozzolanic activity of tiles, bricks and ceramic sanitary-ware in eco-friendly Portland blended cements. Journal of Cleaner Production 2020, 279, 123713 .
AMA StyleA.M. Pitarch, L. Reig, A.E. Tomás, G. Forcada, L. Soriano, M.V. Borrachero, J. Payá, J.M. Monzó. Pozzolanic activity of tiles, bricks and ceramic sanitary-ware in eco-friendly Portland blended cements. Journal of Cleaner Production. 2020; 279 ():123713.
Chicago/Turabian StyleA.M. Pitarch; L. Reig; A.E. Tomás; G. Forcada; L. Soriano; M.V. Borrachero; J. Payá; J.M. Monzó. 2020. "Pozzolanic activity of tiles, bricks and ceramic sanitary-ware in eco-friendly Portland blended cements." Journal of Cleaner Production 279, no. : 123713.
This paper focuses on investigating greener alternatives of cellular concrete technology to fulfil current searches for a shift to circular economy. A novel one-part eco-cellular concrete (ECC-OP) was developed and studied. The one-part alkali activated materials (AAM-OP) and new alkali-activated cellular concrete (AACC) technologies were combined to develop greener alternative of cellular concrete production. The progressive steps from traditional cellular concrete (TCC) based on ordinary Portland cement (OPC) and commercial aluminium powder (A) to a 100% waste-based cellular concrete are presented. Blast furnace slag (BFS) was the precursor, RHA was employed as the silica source, olive stone biomass ash (OBA) was the alkali source and recycled aluminium foil (AR) was employed as an aerating agent. The functional features of the materials were studied and compared to those established by the European standard and the American Concrete Institute (ACI) Committee 523 guides. The new ECC-OP with a bulk density, compressive strength and thermal conductivity that respectively equal 660 kg/m3, 6.3 MPa and 0.20 W/mK was obtained. Finally, a cradle-to-gate life cycle assessment (LCA) was made, where the industrial process of a masonry unit manufacture was raised by using each studied material. A 96% reduction in the kgCO2eq per m3 of material was reached with the new proposed ECC-OP compared to TCC manufacturing.
Alba Font; Lourdes Soriano; Mauro M. Tashima; José Monzó; María Victoria Borrachero; Jordi Payá. One-part eco-cellular concrete for the precast industry: Functional features and life cycle assessment. Journal of Cleaner Production 2020, 269, 122203 .
AMA StyleAlba Font, Lourdes Soriano, Mauro M. Tashima, José Monzó, María Victoria Borrachero, Jordi Payá. One-part eco-cellular concrete for the precast industry: Functional features and life cycle assessment. Journal of Cleaner Production. 2020; 269 ():122203.
Chicago/Turabian StyleAlba Font; Lourdes Soriano; Mauro M. Tashima; José Monzó; María Victoria Borrachero; Jordi Payá. 2020. "One-part eco-cellular concrete for the precast industry: Functional features and life cycle assessment." Journal of Cleaner Production 269, no. : 122203.
The use of almond-shell biomass ash (ABA) as an alkali source in one-part blast furnace slag (BFS) mortars activation was investigated for the first time. The chemical composition of ABA revealed high alkalinity ash to be composed mainly of K2O and CaO. The one-part 100% waste-based mortars and pastes were studied by mechanical and thermogravimetric tests. The compressive strength values of the newly designed materials were higher than the mortars fabricated with commercial products (36.4 versus 21.2 MPa). The formation of C-S-H/(C,K)-A-S-H gels took place in the thermogravimetric studies. The use of ABA in mortars proved an interesting alternative to chemical reagents in alkali activated cements.
Lourdes Soriano; Alba Font; Mauro M. Tashima; José Monzó; María Victoria Borrachero; Jordi Payá. One-part blast furnace slag mortars activated with almond-shell biomass ash: A new 100% waste-based material. Materials Letters 2020, 272, 127882 .
AMA StyleLourdes Soriano, Alba Font, Mauro M. Tashima, José Monzó, María Victoria Borrachero, Jordi Payá. One-part blast furnace slag mortars activated with almond-shell biomass ash: A new 100% waste-based material. Materials Letters. 2020; 272 ():127882.
Chicago/Turabian StyleLourdes Soriano; Alba Font; Mauro M. Tashima; José Monzó; María Victoria Borrachero; Jordi Payá. 2020. "One-part blast furnace slag mortars activated with almond-shell biomass ash: A new 100% waste-based material." Materials Letters 272, no. : 127882.
This investigation presents an important contribution to the understanding of the “zero discharge in the aluminium cycle” goal. The salt slag recycled by-product was reused as alternative aerating agent in the manufacture of cellular concretes: fluid catalytic cracking catalyst (FCC) – based geopolymer (GCC) and blast furnace (BFS) – based alkali-activated (AACC). The hydrogen emission test was used to evaluate the gas releasing properties because of the presence of metallic aluminium in the salt slag. Density (kg/cm3), compressive strength (MPa) and thermal conductivity (W/mK) for GCC were 75, 6.9 and 0.31 and for AACC were 602, 7.5 and 0.16.
A. Font; L. Soriano; J. Monzó; J.C.B. Moraes; M.V. Borrachero; J. Payá. Salt slag recycled by-products in high insulation alternative environmentally friendly cellular concrete manufacturing. Construction and Building Materials 2019, 231, 117114 .
AMA StyleA. Font, L. Soriano, J. Monzó, J.C.B. Moraes, M.V. Borrachero, J. Payá. Salt slag recycled by-products in high insulation alternative environmentally friendly cellular concrete manufacturing. Construction and Building Materials. 2019; 231 ():117114.
Chicago/Turabian StyleA. Font; L. Soriano; J. Monzó; J.C.B. Moraes; M.V. Borrachero; J. Payá. 2019. "Salt slag recycled by-products in high insulation alternative environmentally friendly cellular concrete manufacturing." Construction and Building Materials 231, no. : 117114.
Alkali-activated cements (AACs) technology is being widely investigated as a replacement for ordinary Portland cement (OPC) for environmental benefits. Blast furnace slag (BFS) is one of the most well known precursors used in AACs, having comparable properties to those of traditional OPC-based materials. AACs require alkali solutions, which are commonly based on a combination of sodium or potassium hydroxides with sodium or potassium silicates in high concentration. These alkali solutions represent the use of chemical reagents, and thus can have major environmental, health and economic impacts. Olive-stone (also known as olive pits) biomass ash (OBA) is a residue mainly composed of calcium and potassium oxides. Rice husk ash (RHA) is a rich silica residue from the combustion of rice husk. The combination of both residues can produce a good activating reagent for BFS-based AACs. In the present work, 100% waste-based ternary alkali-activated mortars (TAAM) based on BFS activated by OBA and RHA were developed. The mortars were assessed in terms of their dosage, curing treatment and time evolution. Finally an eco-friendly 100% waste-based TAAM with 67.39 ± 0.44 MPa after 90 days of curing at 20ºC is obtained and a complete microstructural characterization shows a dense and compact matrix with binding gel products labelled as C(K)-S(A)-H and C(K)-S-H.
Alba Font; Lourdes Soriano; Sayonara Maria De Moraes Pinheiro; Mauro M. Tashima; José Monzó; Maria Victoria Borrachero; Jordi Payá. Design and properties of 100% waste-based ternary alkali-activated mortars: Blast furnace slag, olive-stone biomass ash and rice husk ash. Journal of Cleaner Production 2019, 243, 118568 .
AMA StyleAlba Font, Lourdes Soriano, Sayonara Maria De Moraes Pinheiro, Mauro M. Tashima, José Monzó, Maria Victoria Borrachero, Jordi Payá. Design and properties of 100% waste-based ternary alkali-activated mortars: Blast furnace slag, olive-stone biomass ash and rice husk ash. Journal of Cleaner Production. 2019; 243 ():118568.
Chicago/Turabian StyleAlba Font; Lourdes Soriano; Sayonara Maria De Moraes Pinheiro; Mauro M. Tashima; José Monzó; Maria Victoria Borrachero; Jordi Payá. 2019. "Design and properties of 100% waste-based ternary alkali-activated mortars: Blast furnace slag, olive-stone biomass ash and rice husk ash." Journal of Cleaner Production 243, no. : 118568.
Lamb waves have emerged as a valuable tool to examine long plate-like structures in a faster way compared to conventional bulk wave techniques, which make them attractive in non-destructive testing. However, they present a multimodal and dispersive nature, which hinders signal identification. Oblique incidence is one of the most known methods to generate and receive Lamb waves and it is applied in different experimental arrangements with different types of sensors. In this work, several setups were conducted and compared to determine the optimal ones to launch and detect ultrasonic Lamb waves, especially in non-homogeneous specimens. The chosen arrangements were contact with angle beam transducers, immersion in a water tank, localised water coupling using conical containers and air coupling. Plates of two different materials were used, stainless steel and Portland cement mortar. Theoretical and experimental dispersion curves were compared to verify the existence of Lamb modes and good correspondence was achieved.
Santiago Vázquez; Jorge Gosálbez; Ignacio Bosch; Alicia Carrión; Carles Gallardo; Jordi Payá. Comparative Study of Coupling Techniques in Lamb Wave Testing of Metallic and Cementitious Plates. Sensors 2019, 19, 4068 .
AMA StyleSantiago Vázquez, Jorge Gosálbez, Ignacio Bosch, Alicia Carrión, Carles Gallardo, Jordi Payá. Comparative Study of Coupling Techniques in Lamb Wave Testing of Metallic and Cementitious Plates. Sensors. 2019; 19 (19):4068.
Chicago/Turabian StyleSantiago Vázquez; Jorge Gosálbez; Ignacio Bosch; Alicia Carrión; Carles Gallardo; Jordi Payá. 2019. "Comparative Study of Coupling Techniques in Lamb Wave Testing of Metallic and Cementitious Plates." Sensors 19, no. 19: 4068.
Alkali‐activated cements are widely studied as alternative and sustainable binder in soil stabilization. In this research work, a mold was designed and constructed, which allowed small cubic specimens to be made (40x40x40 mm3). With the newly designed mold, cubic samples of soil stabilized with Portland cement (OPC) and alternative AAC (based on spent fluid catalytic cracking catalyst FCC) were prepared from which compressive strength was obtained. Cylindrical specimens were also prepared using the same binders as in the previous case to obtain their compressive strength. The results obtained in both cases were compared. Greater resistances for cubic samples were achieved. The cubic specimens were selected for being better in terms of standard deviation of compressive strength for AAC stabilized soil. The obtained compressive strength and standard deviation results were compared between the soil specimens stabilized with different stabilizers cured at 7, 14, 28 and 90 days. The method allows small‐sized cubic specimens to be prepared. It improves ergonomics. It also facilitates a large number of specimens being obtained with a small amount of sample. Soil stabilized with AAC yielded higher compressive strength after 90 days compared to that with OPC. This article is protected by copyright. All rights reserved.
Juan Cosa; Lourdes Soriano; María Victoria Borrachero; Jordi Payá; José María Monzó. Stabilization of soil by means alternative alkali‐activated cement prepared with spent FCC catalyst. International Journal of Applied Ceramic Technology 2019, 17, 190 -196.
AMA StyleJuan Cosa, Lourdes Soriano, María Victoria Borrachero, Jordi Payá, José María Monzó. Stabilization of soil by means alternative alkali‐activated cement prepared with spent FCC catalyst. International Journal of Applied Ceramic Technology. 2019; 17 (1):190-196.
Chicago/Turabian StyleJuan Cosa; Lourdes Soriano; María Victoria Borrachero; Jordi Payá; José María Monzó. 2019. "Stabilization of soil by means alternative alkali‐activated cement prepared with spent FCC catalyst." International Journal of Applied Ceramic Technology 17, no. 1: 190-196.
An exhaustive study on thermal damage of Portland cement-based materials is addressed. Damage carried out at different temperatures on concrete between 40 and \(525\,^{\circ }\hbox {C}\) were assessed by means of microstructural, physical and nondestructive tests. Microstructural analysis (thermogravimetry and scanning electron microscopy) showed the principal changes of the Portland cement hydrated products for the different analysed temperatures. Compressive and flexural strengths remained constant or even increased at a low heating temperature range, while the mass loss increases. Dilatometry analysis revealed important information about deformation incompatibilities between the paste and the aggregate. These results have been correlated with nondestructive tests: nonlinear impact resonance acoustic spectroscopy (NIRAS) and ultrasonic measures. The dynamic modulus and ultrasonic pulse velocity have closely predicted the linear stiffness decay of the specimens. However, hysteretic parameter from NIRAS analysis exhibited a different trend from stiffness-related parameters, keeping constant until \(250\,^{\circ }\hbox {C}\) and suffering a huge increasing for 400 and \(525\,^{\circ }\hbox {C}\). Ultrasonic attenuation computed with a broadband ultrasonic signal (chirp) revealed interesting information about scattering components inside the material, and is sensitive to interfacial transition zone between aggregate and paste in a large range of frequencies. The correlation between microstructural, mechanical and nondestructive techniques were carried out successfully. Nonlinear vibration and ultrasonic attenuation are non-conventional parameters that gave specific information about a complex damage process, such as a thermal attack in highly heterogeneous materials (e.g. Portland cement composites).
Vicente Genovés; Alicia Carrión; Daniel Escobar; Jorge Gosálbez; Jose Monzó; Maria Victoria Borrachero; Jordi Payá. Nonlinear Acoustic Spectroscopy and Frequency Sweep Ultrasonics: Case on Thermal Damage Assessment in Mortar. Journal of Nondestructive Evaluation 2019, 38, 61 .
AMA StyleVicente Genovés, Alicia Carrión, Daniel Escobar, Jorge Gosálbez, Jose Monzó, Maria Victoria Borrachero, Jordi Payá. Nonlinear Acoustic Spectroscopy and Frequency Sweep Ultrasonics: Case on Thermal Damage Assessment in Mortar. Journal of Nondestructive Evaluation. 2019; 38 (3):61.
Chicago/Turabian StyleVicente Genovés; Alicia Carrión; Daniel Escobar; Jorge Gosálbez; Jose Monzó; Maria Victoria Borrachero; Jordi Payá. 2019. "Nonlinear Acoustic Spectroscopy and Frequency Sweep Ultrasonics: Case on Thermal Damage Assessment in Mortar." Journal of Nondestructive Evaluation 38, no. 3: 61.
In the context of world concern with the environment, this study aims to characterize an auto-combustion produced bamboo leaf ash (BLA) by its pozzolanic behaviour, reactivity and its influence in the total porosity, pore size distribution, tortuosity and mechanical behaviour of cementitious matrices. The chemical and physical characterization of the BLA was carried using X-ray fluorescence, determination of amorphous silica content, X-ray diffraction, Fourier Transform Infrared Spectrophotometry (FTIR), laser granulometry and field emission scanning electron microscopy (FESEM). The assessed BLA is a siliceous material (74.23%) with an amorphous nature due to the amorphous silica content, which represents 92.33% of the total silica. The BLA was classified as highly reactive by assessing its pH and conductivity in a saturated calcium hydroxide (CH) medium for different proportions and temperatures. Frattini analysis, the study of CH:BLA pastes (Thermogravimetric analysis and FTIR) and Portland cement (OPC)/pozzolan pastes (Thermogravimetric analysis and FESEM) are in agreement with this classification. The replacement of OPC by BLA improved the mechanical behaviour of the cementitious matrices, as well their durability. All the mortars containing BLA presented very similar compressive strength to a control mortar (100% OPC) after only 3 days of curing and at the following tested curing ages: 7, 28 and 90 days. In the mercury intrusion porosimetry analysis, the pastes with 20 and 30% BLA content presented higher tortuosity or fewer connected pores than the control paste. Thus, the auto-combustion method proved to be successful and BLA is a suitable alternative for sustainable high-performance matrices.
M.J.B. Moraes; J.C.B. Moraes; M.M. Tashima; J.L. Akasaki; L. Soriano; M.V. Borrachero; J. Payá. Production of bamboo leaf ash by auto-combustion for pozzolanic and sustainable use in cementitious matrices. Construction and Building Materials 2019, 208, 369 -380.
AMA StyleM.J.B. Moraes, J.C.B. Moraes, M.M. Tashima, J.L. Akasaki, L. Soriano, M.V. Borrachero, J. Payá. Production of bamboo leaf ash by auto-combustion for pozzolanic and sustainable use in cementitious matrices. Construction and Building Materials. 2019; 208 ():369-380.
Chicago/Turabian StyleM.J.B. Moraes; J.C.B. Moraes; M.M. Tashima; J.L. Akasaki; L. Soriano; M.V. Borrachero; J. Payá. 2019. "Production of bamboo leaf ash by auto-combustion for pozzolanic and sustainable use in cementitious matrices." Construction and Building Materials 208, no. : 369-380.
Arundo donax is a plant native to Asia and is considered an invader species in the Mediterranean region and many tropical zones in the world. These invader plants can be collected to produce a biomass, which can be converted to ash by combustion. The scope of the study is to assess the use of these ashes (Arundo donax straw ash [ADSA]) as supplementary cementing material due to their relatively high silica content. Electron microscopy studies on dried and calcined samples of different plant parts (cane, sheath leaf and leaf) were carried out. Some different cellular structures were identified in the spodogram (remaining skeleton after calcination). Major silica content was found in leaves and sheath leaves. The main element in all the ashes studied, together with oxygen, was potassium (22 to 46% depending on the part of the plant). Chloride content was also high (5–13%), which limits their use to non-steel reinforced concrete. The pozzolanic reactivity of ADSA was assessed in pastes by thermogravimetric analysis and in mortars with ordinary Portland cement based on compressive strength development. Excellent results were found in terms of reactivity.
Jordi Payá; Josefa Roselló; José María Monzó; Alejandro Escalera; María Pilar Santamarina; María Victoria Borrachero; Lourdes Soriano. An Approach to a New Supplementary Cementing Material: Arundo donax Straw Ash. Sustainability 2018, 10, 4273 .
AMA StyleJordi Payá, Josefa Roselló, José María Monzó, Alejandro Escalera, María Pilar Santamarina, María Victoria Borrachero, Lourdes Soriano. An Approach to a New Supplementary Cementing Material: Arundo donax Straw Ash. Sustainability. 2018; 10 (11):4273.
Chicago/Turabian StyleJordi Payá; Josefa Roselló; José María Monzó; Alejandro Escalera; María Pilar Santamarina; María Victoria Borrachero; Lourdes Soriano. 2018. "An Approach to a New Supplementary Cementing Material: Arundo donax Straw Ash." Sustainability 10, no. 11: 4273.