SAP内养护自密实混凝土的性能研究  

Study on the performance of SAP internal curing self-compacting concrete

作　　者：贾雨晴 苏有文[1] 文江 JIA Yuqing;SU Youwen;WEN Jiang(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621000,China;China Construction third Bureau Group Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621000 [2]中建三局集团有限公司西南分公司,四川成都610041

出　　处：《混凝土与水泥制品》2025年第4期20-24,共5页China Concrete and Cement Products

摘　　要：为了解决自密实混凝土(SCC)的收缩开裂问题,研究了高吸水性树脂(SAP)内养护SCC(SIC-SCC)的性能,在SCC中掺入不同掺量的SAP(0、0.1%、0.2%、0.3%、0.4%、0.5%)与额外水(0、10、20、30 kg/m^(3)),分析了SAP掺量与额外引水量对SIC-SCC力学性能、抗冻性能的影响。结果表明:随着SAP掺量与额外引水量的增加,SIC-SCC的抗压强度、抗折强度基本呈先增加后降低的趋势,当额外引水量为10~20 kg/m^(3)、SAP掺量为0.2%~0.3%时,SIC-SCC的力学性能最佳;随着SAP掺量与额外引水量的增加,SIC-SCC的质量损失率基本呈先降低后增加的趋势,相对动弹性模量基本呈先增加后降低的趋势,当SAP掺量为0.3%、额外引水量为20 kg/m^(3)时,SIC-SCC的抗冻性能最佳。In order to solve the problem of shrinkage cracking in self-compacting concrete(SCC),the performance of super water absorbent polymer(SAP)internal curing SCC(SIC-SCC)was studied.Different contents of SAP(0,0.1%,0.2%,0.3%,0.4%,0.5%)and additional water(0,10,20,30 kg/m^(3))were added into SCC,and the effects of SAP content and additional water content on the mechanical properties and frost resistance of SIC-SCC were discussed.The results show that with the increase of SAP content and additional water content,the compressive and flexural strength of SIC-SCC increase firstly and decrease then.Moreover,the mechanical properties of SIC-SCC are optimal when the additional water content is 10~20 kg/m^(3)and the SAP content is 0.2%~0.3%.With the increase of SAP content and additional water content,the mass loss rate of SIC-SCC shows a trend of first decreasing and then increasing,and the relative dynamic elastic modulus shows a trend of first increasing and then decreasing.When the SAP content is 0.3%and the additional water content is 20 kg/m^(3),the frost resistance of SIC-SCC is the best.

关 键 词：自密实混凝土 高吸水性树脂(SAP)内养护 额外引水量 力学性能 抗冻性能 

分 类 号：TU528.53[建筑科学—建筑技术科学]