火山渣粒径和DPS掺量对轻骨料混凝土性能的影响  

Effect of volcanic slag particle size and DPS content on performance of lightweight aggregate concrete

作　　者：刘宏波[1,2] 张少云 张博洋 李泳 常璞 孙婧 LIU Hongbo;ZHANG Shaoyun;ZHANG Boyang;LI Yong;CHANG Pu;SUN Jing(School of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000,China;Hebei Key Laboratory for Diagnosis,Reconstruction and Anti-Disaster of Civil Engineering,Zhangjiakou 075000,China)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北土木工程诊断、重建与抗灾重点实验室,河北张家口075000

出　　处：《混凝土与水泥制品》2024年第3期90-92,98,共4页China Concrete and Cement Products

基　　金：河北省高校2022年基本科研业务费项目(2022CXTD01);河北省建设科技研究计划项目(2020-266);河北建筑工程学院博士基金项目(B-202103);张家口市科技局重点研发计划项目(2121010B)。

摘　　要：以火山渣作为粗骨料制备了轻骨料混凝土,研究了火山渣粒径(4.75~9.50、4.75~19.00、4.75~26.00 mm)对轻骨料混凝土坍落度、吸水率和抗压强度的影响,优选出了最佳火山渣粒径。在此基础上,研究了渗透结晶型无机防水剂(DPS)的掺量(0、0.6%、0.8%、1.0%)对轻骨料混凝土性能的影响,并分析了其作用机理。结果表明:随着火山渣粒径的增大,轻骨料混凝土的坍落度降低,吸水率增大,抗压强度先增大后减小,最佳火山渣粒径为4.75~19.00 mm;随着DPS掺量的增加,轻骨料混凝土的坍落度和吸水率降低,抗压强度增大;掺入适量DPS可以有效提高混凝土基体的密实度,从而改善混凝土的性能。Lightweight aggregate concrete was prepared by using volcanic slag as coarse aggregates,and the influence of volcanic slag particle size(4.75~9.50、4.75~19.00、4.75~26.00 mm)on the slump,water absorption,and compressive strength of lightweight aggregate concrete was studied,and the optimal volcanic slag particle size was selected.On this basis,the influence of the content of penetrating crystalline inorganic waterproofing agent(DPS)(0,0.6%,0.8%,1.0%)on the performance of lightweight aggregate concrete was studied,and its mechanism of action was analyzed.The results show that as the particle size of volcanic slag increases,the slump of lightweight aggregate concrete decreases,the water absorption rate increases,and the compressive strength first increases and then decreases,and the optimal particle size of volcanic slag is 4.75~19.00 mm.With the increase of DPS content,the slump and the water absorption rate of lightweight aggregate concrete decrease,and the compressive strength increases.Adding an appropriate content of DPS can effectively improve the compactness of the concrete matrix,thereby improving the performance of the concrete.

关 键 词：火山渣粒径 无机防水剂 轻骨料混凝土 工作性 力学性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]