水泥组成与减水剂复配对混凝土保坍性能的影响  

Influences of Cement Compositions and Water-Reducing Agent Compounds on the Slump Retention Performance of Concrete

作　　者：吴习松 WU Xisong(The Fourth Civil Engineering Co.,Ltd.of CREC Shanghai Group,Tianjin,300450 China)

机构地区：[1]中铁上海工程局集团第四工程有限公司,天津300450

出　　处：《大众科学》2024年第11期73-75,共3页China Public Science

摘　　要：保坍性能是影响混凝土性能的重要因素,选择保坍组分好的减水剂也有保坍性能差、坍落度损失过大等问题,因此解决好混凝土的保坍性能十分重要。通过试验发现,保坍组分差的减水剂对水泥水化物的结构和性能有不利影响。为保证混凝土低黏高保,需通过综合考虑水泥水化、减水剂复配、减水效果、引气效果等因素来加强混凝土的保坍性能。Slump retention performance is an important factor affecting the performance of concrete,and choosing a water-reducing agent with good slump retention components also has problems such as poor slump retention performance and the excessive slump loss,so it is very important to solve the slump retention performance of concrete.Through experiments,it is found that water-reducing agents with poor slump retention components have adverse effects on the structure and properties of cement hydrates.In order to ensure the low viscosity and high retention of concrete,it is necessary to comprehensively consider factors such as cement hydration,water-reducing agent compounds,water-reducing effects and air-entraining effects to enhance the slump retention performance of concrete.

关 键 词：减水剂 复配 保坍 混凝土 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]