不同种类改性剂对C40混凝土性能影响研究  

Study on performance of polymer modified waterproof concrete

作　　者：孙婧[1,2,3] 兰建伟 张少云 贾晓静 SUN Jing;LAN Jianwei;ZHANG Shaoyun;JIA Xiaojing(Hebei University of Architecture,Zhangjiakou,Hebei 075000;Hebei Key Laboratory for Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Zhangjiakou 075000,China;Hebei University Road and Bridge Structure Health Monitoring and Maintenance and Reinforcement Application Technology Research and Development Center,Zhangjiakou 075000,China)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省土木工程诊断、改造与抗灾重点实验室,河北张家口075000 [3]河北省高校道桥结构健康监测与维修加固应用技术研发中心,河北张家口075000

出　　处：《河北建筑工程学院学报》2023年第1期51-56,共6页Journal of Hebei Institute of Architecture and Civil Engineering

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);张家口市科技局重点研发科技项目(2021012B,2221210D)。

摘　　要：针对丙烯酸类聚合物乳液RMO和碱活性化学渗透液DPS两种改性材料对C40混凝土力学性能和工作性能的改性效果进行研究。其中,RMO分别按照6种替代率(0、5%、10%、15%、20%、25%)替代部分水泥内掺入混凝土拌合物中,分析不同种类改性剂对C40混凝土的坍落扩展度、抗压强度和吸水率的影响。DPS分别按照6种浓度(0、20%、40%、60%、80%、100%)配置溶液,采用浸泡处理和涂覆处理两种处理方式,探究其对混凝土抗压强度和吸水率的影响。结果表明:随着RMO替代率的增加,混凝土的坍落扩展度和抗压强度均呈现先增大后减小的趋势,混凝土吸水率有轻微下降趋势后趋于稳定;当RMO替代率达到10%时,混凝土坍落扩展度达到最大值470mm,当RMO替代率达到15%时,混凝土抗压强度达到最大值47.3MPa。随着DPS溶液浓度的升高,混凝土的抗压强度明显增加,吸水率明显降低,且浸泡处理对抗压强度的改性效果优于涂覆处理,涂覆处理对吸水率的降低作用强于浸泡处理。In this paper,the modification effects of two kinds of modified materials,acrylic polymer emulsion RMO and alkali activated chemical osmotic fluid DPS,on the mechanical properties and working performance of C40 concrete are studied.Among them,RMO substitutes part of the cement into the concrete mixture according to six substitution rates(0,5%,10%,15%,20%,25%),and analyzes the influence of different modifiers on the slump expansion,compressive strength and water absorption of C40 concrete.DPS solution was prepared according to six concentrations(0,20%,40%,60%,80%,100%)respectively.The effects of soaking treatment and coating treatment on compressive strength and water absorption of concrete were studied.The results show that:with the increase of RMO substitution rate,the slump expansion and compressive strength of concrete increase first and then decrease,and the water absorption of concrete decreases slightly and then tends to be stable;When the replacement rate of RMO reaches 10%,the slump expansion of concrete reaches the maximum value of 470mm.When the replacement rate of RMO reaches 15%,the compressive strength of concrete reaches the maximum value of 47.3MPa.With the increase of DPS solution concentration,the compressive strength of concrete increases significantly,and the water absorption decreases significantly.The effect of soaking treatment on compressive strength is better than coating treatment,and the effect of coating treatment on water absorption is stronger than soaking treatment.

关 键 词：聚合物 RMO DPS 坍落扩展度 抗压强度 

分 类 号：TU528.0[建筑科学—建筑技术科学]