Performance and microstructure analysis of recycled fine aggregate concrete made from sintered shale brick
Using recycled fine aggregates from discarded sintered shale bricks as a quality substitute for natural sand to pre-pare recycled concrete,the study investigated the impact of the substitution rate of recycled fine aggregates from discarded sintered shale bricks on the performance of concrete and conducted microscopic analysis.The results showed that with the increase of the substitution rate of recycled fine aggregates from discarded sintered shale bricks,the compressive strength and splitting tensile strength of recycled concrete showed a downward trend.However,the recycled concrete with a substitution rate of 20％can reach the strength level of ordinary concrete and meet the standard requirements.Microscopic analysis showed that with the increase of the substitution rate of recycled fine aggregates,they blocked the development of hydration products,affected the close connection of crystals in internal space,and had a negative impact on the internal structure of concrete.
万方数据
维普
