微波强化粗骨料再生混凝土性能试验研究  

Experimental study on performance of microwave-enhanced coarse aggregate recycled concrete

作　　者：戴俊[1] 蒋昊轩 薛贵堂 杨清清 王林涛 DAI Jun;JIANG Haoxuan;XUE Guitang;YANG Qingqing;WANG Lintao(School of Architectural and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710045,China)

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710045

出　　处：《混凝土》2024年第4期63-66,110,共5页Concrete

基　　金：国家自然科学基金(51174159);陕西省自然科学基础研究计划项目(2017JQ5069);陕西省教育厅专项科学研究基金(15JK1471)。

摘　　要：借助微波辅助机械工艺对再生粗骨料进行强化,以取代率和龄期作为变量对制作的强化再生混凝土进行宏观、微观试验分析其力学性能。研究结果表明:强化再生混凝土与天然骨料混凝土的破坏形态相似,其抗压强度较未强化再生混凝土有所提升,试件的峰值应变、极限应变、弹性模量虽有变化,但仍优于未强化再生混凝土;在微观方面,微波强化技术改善了再生粗骨料自身的缺陷,使其更接近天然骨料。这些结果验证了微波辅助机械强化再生粗骨料的优越性,在一定条件下强化再生粗骨料可替代天然骨料再次利用。The recycled coarse aggregate was reinforced with the aid of microwave-assisted mechanical technology,and the mechanical properties of the reinforced recycled concrete were analyzed by macroscopic and microscopic tests with the substitution rate and age as variables.The research results show that the failure patterns of reinforced recycled concrete are similar to that of ordinary concrete,and its compressive strength is improved compared with that of unreinforced recycled concrete.Microwave strengthening technology improves the defects of recycled coarse aggregate itself,making it closer to natural aggregate.These results verify the superiority of microwave-assisted mechanical strengthening of recycled coarse aggregate,which can be used instead of natural aggregate under certain conditions.

关 键 词：微波 粗骨料强化 再生混凝土 破坏形态 力学性能 电镜扫描 

分 类 号：TU528.041[建筑科学—建筑技术科学]