(1 浙江工业大学建筑工程学院， 杭州 310014； 2 杭州市建设工程质量安全监督总站， 杭州 310005)

［摘要］再生细骨料混凝土是一种新型绿色建筑材料，具有环保和经济价值。作为一种新材料，再生细骨料混凝土性能的优劣直接关系到混凝土结构的质量。采用基于自由水灰比的配合比设计方法成功配制了再生细骨料混凝土，并按5种水灰比、6种再生细骨料取代率分别进行了再生细骨料混凝土工作性能、力学性能和耐久性能试验，探讨了工程应用的可行性。试验表明，再生细骨料混凝土的工作性能基本满足要求；当取代率不大于20%时，其抗压强度、抗拉强度、抗折强度均与普通骨料混凝土相差较小，且其抗渗性能达到P6等级，氯离子渗透性低，抗碳化性能较好，表明其基本性能安全可靠，能够替代普通骨料混凝土。

［关键词］再生细骨料； 混凝土； 力学性能； 耐久性能；  水灰比； 取代率

中图分类号：TU528文献标识码：A文章编号：1002-848X(2019)10-0081-04

Experimental research on mechanical properties and durability of recycled fine aggregate concrete for actual production

Sun Yukun1, Li Danle1, Xu Yunxiao2, Huang Hai1

(1 College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China; 2 Quality and Safety Supervision Department of Hangzhou, Hangzhou 310005, China)

Abstract:As a new kind of green building material, recycled fine aggregate (RFA) concrete has environmental protection and economic values. The properties of RFA concrete are related to quality of concrete structures directly. Adopting the mixture ratio design method based on free water-cement ratio, the RFA concrete was successfully produced. Considering five different values of water-cement ratios and six different values of RFA replacement ratios, tests of workability, mechanical properties and durability of the RFA concrete were conducted respectively to discuss feasibility of engineering practice. The experimental results show that the workability of the RFA concrete can basically meet the engineering requirements. When the replacement ratio is smaller than 20%, the compressive strength, tensile strength and flexural strength of the RFA concrete are less different from those of the ordinary concrete. When the replacement ratio is smaller than 20%, the impermeability of the RFA concrete reaches up to grade P6, the permeability of the chloride ion is low, and the carbonation resistance is good. So it can be used to replace the ordinary aggregate concrete.

Keywords:recycled fine aggregate; concrete; mechanical property; durability;  water-cement ratio; replacement ratio

*浙江省建设科研计划项目(2014CZ26)。

作者简介：孙宇坤，博士，副教授，硕士生导师，Email:sunyukun@zjut.edu.cn。