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.
Highlights
RESUMEN: Influencia de la ceniza de bagazo y los áridos de hormigón reciclado en las propiedades de endurecimiento de hormigones de alta resistencia
It was clearly observed that the high amount of ground bagasse ash (GBA) replacement of ordinary Portland cement (OPC) by weight led to an increase in paste volume, from which the density of GBA was made to be lower than that of OPC, resulting in the lower density of the RA50 concrete
Based on the results of the properties of highstrength concrete (HS-C) containing recycled concrete aggregate (RCA) with ground bagasse ash (GBA) are summarized as follows: 1. The use of RCA as a full replacement for crushed limestone in concrete resulted in a higher volume of permeable pore space, lower density, and lower resistance to chloride ion penetration compared to CT concrete
Summary
RESUMEN: Influencia de la ceniza de bagazo y los áridos de hormigón reciclado en las propiedades de endurecimiento de hormigones de alta resistencia. The concrete mixing method and the use of a pozzolanic material leads to an increase in the quality of concrete containing RCA [14, 15]. Pozzolanic materials, e.g., fly ash, palm oil fuel ash and rice husk ash, are widely used as a cement replacement in concrete and can improve the quality and durability properties of concrete [16,17,18,19,20]. In this research, BA was ground to a small particle size and was used to partially substitute OPC at 20 to 50%wt of cementitious material to improve the quality of HS-C containing RCA. This will lead to an increase in their use and be of benefit to the environment
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