不同掺量减水剂/引气剂对桥梁混凝土干缩性能的影响研究  

Study on Effect of Different Dosage of Water Reducing Agent/Air Entraining Agent on Dry Shrinkage Performance of Bridge Concrete

作　　者：杨飞 YANG Fei(Qiandongnan Highway Construction and Maintenance Co.,Ltd.)

机构地区：[1]黔东南公路建设养护有限公司

出　　处：《广东建材》2024年第7期13-15,共3页Guangdong Building Materials

摘　　要：为分析不同掺量引气剂和减水剂制备所得混凝土的性能差异,文中对不同掺量减水剂和引气剂对桥梁混凝土干缩性能的影响进行分析。结果表明,混凝土干燥收缩变形幅度在掺加0.8%减水剂时达到较小水平,约为掺加1.0%减水剂的混凝土干缩变形的92.7%及掺加0.5%减水剂的混凝土的88.5%;掺加0.05%引气剂时混凝土水分蒸发量和干燥收缩值均处于相对较低水平,但不论引气剂掺量多少,混凝土水分蒸发量间并没有明显差距。In order to analyze the difference of performance of concrete prepared with different dosage of air entraining agent and water reducing agent,the influence of different dosage of water reducing agent and air entraining agent on the dry shrinkage performance of bridge concrete was analyzed.The results show that the range of dry shrinkage deformation of concrete with 0.8%superplasticizer reaches a small level,about 92.7%of the dry shrinkage deformation of concrete with 1.0%superplasticizer and 88.5%of concrete with 0.5%superplasticizer.When adding 0.05%air entraining agent,the moisture evaporation and drying shrinkage of concrete are relatively low,but there is no obvious difference between the moisture evaporation of concrete regardless of the amount of air entraining agent.

关 键 词：引气剂 减水剂 桥梁工程 桥梁混凝土 混凝土干缩 

分 类 号：U444[建筑科学—桥梁与隧道工程]