Influence of bagasse ash and recycled concrete aggregate on hardened properties of high-strength concrete
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Author list: Rattanachu P., Karntong I., Tangchirapat W., Jaturapitakkul C., Chindaprasirt P.
Publisher: CSIC Consejo Superior de Investigaciones Cientificas
Publication year: 2018
Volume number: 68
Issue number: 330
ISSN: 0465-2746
eISSN: 0465-2746
Languages: English-Great Britain (EN-GB)
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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. ฉ 2018 CSIC.
Keywords
Aggregate