混凝土拌和物的含气量损失试验研究  

Experimental study on gas content loss of concrete mixture

作　　者：王龙强 WANG Longqiang(Hebei Water Conservancy Planning and Design Research Institute Co.,Ltd,Shijiazhuang 050000,China)

机构地区：[1]河北省水利规划设计研究院有限公司,石家庄050000

出　　处：《水科学与工程技术》2021年第4期57-59,共3页Water Sciences and Engineering Technology

摘　　要：在混凝土中掺入引气剂能够提高混凝土的耐久性和抗冻性,试验研究了在相同强度C25下3种不同抗冻等级(F50、F100、F150)的3种配合比的拌和物坍落度和含气量的损失值,在试验室内一定的环境条件下,分别将3种配比的拌和物连续搅拌1h后进行坍落度和含气量的测定,结果表明混凝土的坍落度和含气量损失都较大,影响混凝土含气量的因素较多,施工单位应重视坍落度及含气量的损失因素,在混凝土的施工现场做好测试工作,试验研究结果能够为水利施工单位提供借鉴参考依据。The durability and frost resistance of concrete can be improved by adding air entraining agent to concrete,the slump and gas content loss values with three different freezing resistance grades(F50,F100,F150)at the same strength C25 were studied,under certain environmental conditions in the laboratory,slump and gas content were measured after the mixture of the three proportions was continuously stirred for 1h,the results show that it is large to the concrete slump and gas loss,there are many factors affecting the air content of concrete,The construction unit should pay attention to the loss factors of slump and gas content,it should do a good job of testing in the concrete construction site,the experimental results can provide reference basis for water conservancy construction.

关 键 词：含气量:坍落度 抗冻等级 

分 类 号：S274.4[农业科学—农业水土工程]