烧结页岩砖再生细骨料混凝土性能及微观分析  

Performance and microstructure analysis of recycled fine aggregate concrete made from sintered shale brick

作　　者：黄榜彪[1,3] 张恒 黄秉章 黄洋茂 谢伟标 HUANG Bangbiao;ZHANG Heng;HUANG Bingzhang;HUANG Yangmao;XIE Weibiao(School of Civil Engineering and Architecture,Guangxi University of Science and Technology,Liuzhou 545001,China;Department of Civil Engineering and Architecture,Liuzhou Institute of Technology,Liuzhou 545006,China;Research Center for Life Cycle Management and Virtual Simulation Engineering of Prefabricated Buildings in Guangxi Zhuang Autonomous Region,Liuzhou 545001,China)

机构地区：[1]广西科技大学土木建筑工程学院,广西柳州545001 [2]柳州工学院土木建筑工程系,广西柳州545006 [3]广西壮族自治区装配式建筑生命全周期管理与虚拟仿真工程研究中心,广西柳州545001

出　　处：《新型建筑材料》2024年第8期79-82,共4页New Building Materials

基　　金：广西重点研发项目(桂科AB22080083,桂科AB23026065)。

摘　　要：以废弃烧结页岩砖再生细骨料等质量替代天然砂制备再生混凝土,研究废弃烧结页岩砖再生细骨料替代率对混凝土力学性能的影响,并进行微观分析。结果表明,随着废弃烧结页岩砖再生细骨料替代率的增大,再生混凝土的抗压和劈裂抗拉强度均逐渐降低。但替代率为20%的再生混凝土抗压强度与普通混凝土相差较小,较普通混凝土仅降低0.4%。微观分析表明,随着再生细骨料替代率的增大,其阻断了水化产物的发展,影响晶体在内部空间的紧密相连,对混凝土内部结构产生不良影响。Using recycled fine aggregates from discarded sintered shale bricks as a quality substitute for natural sand to prepare recycled concrete,the study investigated the impact of the substitution rate of recycled fine aggregates from discarded sintered shale bricks on the performance of concrete and conducted microscopic analysis.The results showed that with the increase of the substitution rate of recycled fine aggregates from discarded sintered shale bricks,the compressive strength and splitting tensile strength of recycled concrete showed a downward trend.However,the recycled concrete with a substitution rate of 20%can reach the strength level of ordinary concrete and meet the standard requirements.Microscopic analysis showed that with the increase of the substitution rate of recycled fine aggregates,they blocked the development of hydration products,affected the close connection of crystals in internal space,and had a negative impact on the internal structure of concrete.

关 键 词：废弃烧结页岩砖 细骨料 抗压强度 劈裂抗拉强度 微观分析 

分 类 号：TU528.041[建筑科学—建筑技术科学]