浆膜层和水膜层厚度对新拌混凝土流动性的影响  

Influence of slurry film thickness and water film thickness on flowability of fresh concrete

作　　者：陶俊 罗小东 黄小川 肖世玉 TAO Jun;LUO Xiaodong;HUANG Xiaochuan;XIAO Shiyu(Chengdu Seller Concrete Co.,Ltd of CDCEG,Chengdu 610000,China)

机构地区：[1]成都建工赛利混凝土有限公司,四川成都610000

出　　处：《混凝土与水泥制品》2024年第1期30-34,共5页China Concrete and Cement Products

基　　金：四川省科技重点研发项目(2021YFG0272);成都建工集团研发项目(CDJG-20200031)。

摘　　要：通过改变石粉含量、砂率以及砂级配得到不同浆膜层厚度(PFT)和水膜层厚度(WFT)的混凝土拌合物,通过混凝土扩展度以及T_(500)试验,研究了PFT与WFT对新拌混凝土流动性的影响。结果表明:当WFT>1.40μm时,混凝土的扩展度及T_(500)随PFT同步变化;当WFT<1.40μm时,混凝土的扩展度及T_(500)随WFT同步变化;当PFT与WFT同时增加时,混凝土的扩展度增加,T_(500)降低;当PFT与WFT同时降低时,PFT与WFT的降幅不同,混凝土的扩展度及T_(500)变化也有所差异。By changing the content of stone powder,sand ratio,and sand grading,concrete mixtures with different slurry film thickness(PFT)and water film thickness(WFT)were obtained.The influence of PFT and WFT on the flowability of fresh concrete was studied through concrete expansion and T_(500) tests.The results indicate that when WFT>1.40μm,the expansion and T_(500) of concrete change synchronously with PFT.When WFT<1.40μm,the expansion and T_(500) of concrete change synchronously with the change of WFT.When PFT and WFT increase simultaneously,the expansion of concrete increases and T_(500) decreases.When both PFT and WFT decrease simultaneously,the reduction amplitude of PFT and WFT is different,and the expansion and T_(500) changes of concrete are also different.

关 键 词：浆膜层厚度 水膜层厚度 扩展度 流动性 

分 类 号：TU528.1[建筑科学—建筑技术科学]