Effect of epoxy resin surface-modified techniques on recycled coarse aggregate and recycled aggregate concrete

被引：11

作者：

Geng, Wenze ^{[1
,2
]}

Li, Chunguang ^{[1
,3
,4
]}

Zeng, Deliang ^{[1
]}

Chen, Jiayou ^{[1
]}

Wang, Hongtao ^{[5
]}

Liu, Zhenzhong ^{[1
]}

Liu, Longcheng ^{[3
,4
]}

机构：

[1] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China

[2] North China Univ Technol, Sch Civil Engn, Beijing 100144, Peoples R China

[3] Univ South China, R&D Ctr Radioact Waste Treatment Disposal & Modeli, Hengyang 421001, Peoples R China

[4] China Inst Atom Energy, Beijing 102413, Peoples R China

[5] China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF BUILDING ENGINEERING | 2023年 / 76卷

基金：

中国国家自然科学基金;

关键词：

Modified recycled coarse aggregates; Water -based epoxy resin; Water absorption; Recycled concrete; Mechanical strength; IMPROVEMENT; QUALITY; MORTAR;

D O I：

10.1016/j.jobe.2023.107081

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The absorption of water by recycled coarse aggregates (RCAs) is significantly greater than that by natural coarse aggregates (NCAs), which affects the mechanical properties of recycled aggregate concrete (RAC). To mitigate this issue and enhance the mechanical strength of RCAs, a waterbased epoxy resin was utilized to wrap an RCA, resulting in modified RCA (MRCA). Subsequently, MRCA and unmodified RCA (URCA) were mixed in various proportions and substituted for NCA in concrete, followed by performance evaluation. The experimental results showed that the MRCA absorbed 36.5% less water than did the RCA, and the compressive and tensile strengths of modified RAC (MRAC) were 11.3% and 4.2% greater than those of nature aggregate concrete (NAC) and 8.2% and 2.9% more than those of unmodified recycled aggregate concrete (URAC), respectively. This finding provides a strategy and possibility for the preparation of concrete using recycled aggregates.

引用

页数：12

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