Effect of Mineral Aggregates and Chemical Admixtures as Internal Curing Agents on the Mechanical Properties and Durability of High-Performance Concrete

Vázquez Rodríguez, Francisco Javier y Elizondo Villareal, Nora y Verástegui, Luz Hypatia y Arato Tovar, Ana María y López Perales, Jesús Fernando y Contreras de León, José Eulalio y Gómez Rodríguez, Cristian y Fernández González, Daniel y Verdeja, Luis Felipe y García Quiñonez, Linda Viviana y Rodríguez Castellanos, Edén Amaral (2020) Effect of Mineral Aggregates and Chemical Admixtures as Internal Curing Agents on the Mechanical Properties and Durability of High-Performance Concrete. Materials, 13 (9). p. 2090. ISSN 1996-1944

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URL o página oficial: http://doi.org/10.3390/ma13092090

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Abstract: In the present work, the effect of mineral aggregates (pumice stone and expanded clay aggregates) and chemical admixtures (superplasticizers and shrinkage reducing additives) as an alternative internal curing technique was investigated, to improve the properties of highperformance concrete. In the fresh and hardened state, concretes with partial replacements of Portland cement (CPC30R and OPC40C) by pulverized fly ash in combination with the addition of mineral aggregates and chemical admixtures were studied. The physical, mechanical, and durability properties in terms of slump, density, porosity, compressive strength, and permeability to chloride ions were respectively determined. The microstructural analysis was carried out by scanning electronic microscopy. The results highlight the effect of the addition of expanded clay aggregate on the internal curing of the concrete, which allowed developing the maximum compressive strength at 28 days (61 MPa). Meanwhile, the replacement of fine aggregate by 20% of pumice stone allowed developing the maximum compressive strength (52 MPa) in an OPC-based concrete at 180 days. The effectiveness of internal curing to develop higher strength is attributed to control in the porosity and a high water release at a later age. Finally, the lowest permeability value at 90 days (945 C) was found by the substitutions of fine aggregate by 20% of pumice stone saturated with shrinkage reducing admixture into pores and OPC40C by 15% of pulverized fly ash. It might be due to impeded diffusion of chloride ions into cement paste in the vicinity of pulverized fly ash, where the pozzolanic reaction has occurred. The proposed internal curing technology can be considered a real alternative to achieve the expected performance of a high-performance concrete since a concrete with a compressive strength range from 45 to 67 MPa, density range from 2130 to 2310 kg/m3, and exceptional durability (< 2000 C) was effectively developed.

Tipo de elemento: Article
Materias: T Tecnología > TA Ingeniería General y Civil
Divisiones: Ingeniería Mecánica y Eléctrica
Usuario depositante: Editor Repositorio
Creadores:
CreadorEmailORCID
Vázquez Rodríguez, Francisco JavierNO ESPECIFICADONO ESPECIFICADO
Elizondo Villareal, NoraNO ESPECIFICADONO ESPECIFICADO
Verástegui, Luz HypatiaNO ESPECIFICADONO ESPECIFICADO
Arato Tovar, Ana MaríaNO ESPECIFICADONO ESPECIFICADO
López Perales, Jesús FernandoNO ESPECIFICADONO ESPECIFICADO
Contreras de León, José EulalioNO ESPECIFICADONO ESPECIFICADO
Gómez Rodríguez, CristianNO ESPECIFICADONO ESPECIFICADO
Fernández González, DanielNO ESPECIFICADONO ESPECIFICADO
Verdeja, Luis FelipeNO ESPECIFICADONO ESPECIFICADO
García Quiñonez, Linda VivianaNO ESPECIFICADONO ESPECIFICADO
Rodríguez Castellanos, Edén AmaralNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 27 Oct 2021 21:00
Última modificación: 03 Dic 2021 18:19
URI: http://eprints.uanl.mx/id/eprint/22397

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