Influence of bagasse ash and recycled concrete aggregate on hardened properties of high-strength concrete

Abstract

ABSTRACT:This research aimed to use of bagasse ash as a cement replacement in high-strength recycled aggregate concrete (HS-RAC). Crushed limestone was replaced with 100% recycled concrete aggregate (RCA) and the ground bagasse ash (GBA) was used to partially replace ordinary Portland cement (OPC) at 20, 35 and 50%wt of binder to cast HS-RAC. The results indicated that the replacing of crushed limestone with RCA had a negative impact on the properties of the concrete. Increasing the amount of GBA in HS-RAC resulted in a decrease in density and an increase in the volume of permeable pore space. The concrete mixtures prepared with 20%wt GBA replacement of OPC promoted greater the compressive strength than the conventional concrete (CT concrete) at 90 days or more. HS-RAC with GBA (up to 50%) was more durable in terms of chloride ion penetration resistance, although it had lower compressive strength than the CT concrete. RESUMEN: Influencia de la ceniza de bagazo y los áridos de hormigón reciclado en las propiedades de endurecimiento de hormigones de alta resistencia.En esta investigación se utilizó ceniza de bagazo como sustituto del cemento en hormigón de alta resistencia con áridos reciclados (HS-RAC). La piedra caliza fue sustituida por un árido 100% reciclado de hormigón y la ceniza de bagazo molida (GBA) en diferentes porcentajes (20, 35 y 50% en peso del material cementante) fue utilizada para reemplazar parcialmente al cemento Portland para producir hormigón de tipo HS-RAC. Los resultados indicaron que la sustitución de la piedra caliza molida por áridos de hormigón reciclado tiene un efecto negativo en las propiedades del hormigón. Aumentar la cantidad de GBA en el HS-RAC redujo la densidad e incrementó el volumen del espacio de los poros permeables. Las mezclas de hormigón preparadas reemplazando 20% en peso del cemento Portland por ceniza de bagazo molida presentaron mayor resistencia a la compresión que el hormigón convencional a los 90 días o más. El HS-RAC con GBA (hasta 50%) tuvo una durabilidad mayor que el hormigón convencional en términos de resistencia a la penetración de iones de cloruro, a pesar de tener una menor resistencia a la compresión.PALABRAS CLAVE: Hormigón; Árido; Resistencia a la compresión; Durabilidad; Cloruros ORCID ID: P. Rattanachu

Adopting recycled aggregates as sustainable construction materials: A review of the scientific literature

“…• Durability of concrete containing RAs, including adopting RAs in HPC [86,87]: the durability properties of HPC that have been studied in literature included permeability, resistance to carbonation, and resistance to chloride penetration [88,89].…”

A Review of Chloride Penetration of Recycled Concrete with Enhancement Treatment and Service Life Prediction

“…In addition, Kapoor et al [ 125 ] demonstrated that the addition of MK was more effective in reducing chloride penetrability than equivalent SF addition. Emerging pozzolanic materials such as rice hull ash (RHA) [ 126 , 127 , 128 ], BA [ 129 , 130 ], palm oil fuel ash (POFA) [ 127 ], and palm oil clinker powder (POCP) [ 127 ] have also been proven to have superior effects in reducing RAC chloride ion permeability. In addition, Amiri et al [ 131 ] tried to use waste rubber powder as replacement for cement to improve the performance, but with little success (only 4–6%).…”

Utilization of Sugar Mill Waste Ash as Pozzolanic Material in Structural Mortar

“…The low specific gravity of BA and increasing BA content in the mix up to 10% results in the dust content in the mortar mix increasing, which results in a reduction in mortar density [43,45]. It was also stated that the higher quantity of the BA replacement of OPC by weight preceded an increase in paste volume, from which the density of BA was poorer than that of OPC, resulting in the lower density of the concrete [46].…”