Research Progress of Special Aggregate Concrete

Abstract

Abstract: Aggregate is the major component of concrete. With the development of concrete technology and the expansion of application scenarios, some special aggregates whose basic properties and surface conditions are quite different from those of natural aggregates have gradually attracted wide attention. For example, the use of lightweight/heavyweight aggregates is the main method to meet the special density requirements of major construction projects such as high-rise and long-span structures, bridge cantilever construction, and building foundation anti-floating. Besides, the use of recycled aggregates instead of natural aggregates to prepare recycled aggregate concrete can effectively solve the problems of the shortage of natural aggregate resources and the recycling utilization of waste concrete. There are some common scientific and technical problems during the application of these special aggregates. The performance, microstructure, and construction characteristics of concrete prepared with these special aggregates are significantly different from those of ordinary concrete. This study reviews the research progress and development trend of three types of special aggregate concrete including lightweight aggregate concrete, heavyweight concrete and recycled aggregate concrete. The research on the aggregates properties, the interfacial transition zone (ITZ) and construction technology are highlighted. The suggestions on the development trend of the above concrete are also proposed.

Key words: special aggregate, lightweight aggregate concrete, heavyweight concrete, recycled aggregate concrete, interfacial transition zone

CLC Number:

TU528

LIU Yunpeng, SHEN Peiliang, HE Yongjia, WANG Fazhou. Research Progress of Special Aggregate Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(9): 2831-2855.

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