Classification of Recycled Brick and Concrete Coarse Aggregate Based on Brick Content

Abstract

Abstract: The existing recycled aggregate classification standard in China is inapplicable to guide the comprehensive utilization of recycled aggregate with high brick content. The influence of brick content on water absorption, apparent density and crushing index of recycled brick and concrete aggregate was studied. Based on data analysis, a general linear relationship formula between brick content and water absorption, crushing index was established. A new classification method of recycled brick and concrete aggregate was proposed, which took brick content as main control index, as well as apparent density, water absorption and crushing index as technical control index. This method can effectively improve the existing standards and make it adapt the properties of recycled brick and concrete aggregate. Moreover, it can guide the resource utilization of recycled brick and concrete aggregate in concrete engineering more effectively.

Key words: brick content, recycled brick and concrete aggregate, demolition waste, classification, technical standard, resource utilization

CLC Number:

TU528

TAO Hangyu, CHEN Ping, GONG Yifan, ZHAN Jingfang, ZHANG Li. Classification of Recycled Brick and Concrete Coarse Aggregate Based on Brick Content[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(3): 957-963.

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