废黏土砖骨料轻质混凝土物理力学性能试验研究  

Experimental study on physical and mechanical properties of lightweight concrete with waste clay brick aggregate

作　　者：韩尚宇[1] 康登源 张慧华[1] 张培恒 王先镕 HAN Shangyu;KANG Dengyuan;ZHANG Huihua;ZHANG Peiheng;WANG Xianrong(School of Civil Engineering and Architecture,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学土木建筑学院,江西南昌330063

出　　处：《混凝土》2024年第9期118-123,共6页Concrete

基　　金：国家自然科学基金(52068054)。

摘　　要：将废弃黏土砖破碎成骨料用于制备轻质混凝土,可同步达到资源再利用、降低环境污染、节省天然骨料的目的。为揭示废弃黏土砖骨料轻质混凝土的性能,通过室内试验对废砖骨料级配、废砖骨料体积率、水灰比、泡沫掺量等因素影响轻质混凝土的干密度、吸水率、抗压强度性能进行试验研究,结果表明:泡沫掺量对干密度和抗压强度影响显著,泡沫掺量由2%增加到5%时,干密度由1407kg/m^(3)减小到1128kg/m^(3),抗压强度由13.39MPa减小到4.66MPa,废砖骨料级配对吸水率影响显著,骨料级配从A组到C组级配时,吸水率由11.3%减小到5.7%。Crushing waste clay bricks-aggregates for preparing lightweight concrete can simultaneously achieve the goals of resource reuse,reducing environmental pollution and saving natural aggregates.In order to reveal the performance of lightweight concrete with waste clay brick aggregate,laboratory tests were carried out to study the dry density,water absorption and compressive strength of lightweight concrete affected by such factors as the gradation of waste brick aggregate,volume ratio of waste brick aggregate,water cement ratio,and foam content.The results show that the foam content has a significant impact on the dry density and compressive strength.When the foam content increases from 2%to 5%,the dry density decreases from 1407 kg/m^(3) to 1128 kg/m^(3).The compressive strength decreases from 13.39 MPa to 4.66 MPa,and the water cement ratio has a significant impact on the water absorption.When the aggregate is graded from group A to group C,the water absorption decreases from 11.3%to 5.7%.

关 键 词：资源利用 废弃黏土砖骨料 轻质混凝土 影响因素 性能分析 

分 类 号：TU528.041[建筑科学—建筑技术科学]