冻融环境下补偿收缩混凝土抗冻性能试验研究  

Experimental Research on Frost Resistance of Compensation Shrinkage Concrete Strength Under the Environment of Freeze Thawing

作　　者：黄伟[1,2] 

机构地区：[1]淮南联合大学建筑工程系,安徽淮南232038 [2]安徽理工大学矿山地下工程教育部工程研究中心,安徽淮南232001

出　　处：《鸡西大学学报（综合版）》2014年第11期42-43,50,共3页JOurnal of Jixi University:comprehensive Edition

基　　金：淮南市科技计划项目(2012A01103);安徽省高校省级优秀人才基金重点项目(2013SQRL140ZD);安徽省住房城乡建设科学技术计划项目(2013YF-55)

摘　　要：为了研究补偿收缩混凝土的抗冻性能,采用慢冻法对普通混凝土和补偿收缩混凝土进行冻融对比试验。通过对比研究普通混凝土和补偿收缩混凝土冻融后质量损失、强度损失和相对动弹性模量变化趋势,从而得出补偿收缩混凝土的抗冻性能。试验结果表明,普通混凝土冻融100次后,质量损失率为2.09%,抗压强度下降35.2%,相对动弹性模量下降到60.8%;补偿收缩混凝土质量损失率为1.62%,抗压强度下降30.3%,相对动弹性模量下降到64.8%;试验三个参数指标表明添加膨胀剂有助于提高混凝土抵抗冻融破坏的能力,改善混凝土结构的损伤程度,体现了膨胀剂对混凝土的增强机理。In order to study the anti- frost property of shrinkage- compensating concrete,freeze thawing contrast tests were conducted between ordinary and shrinkage- compensating concrete in slow freezing situation. Quality loss,strength loss,variation trend of relative dynamic modulus of elasticity were studied through freeze thawing contrast,thus the anti- frost property of shrinkage- compensating concrete has come to a conclusion： After 100 times＇ freeze thawing,the quality loss ratio of ordinary concrete is2. 09%; compressive strength decreased 35. 2%; and relative elasticity modulus decreased 60. 8%. The quality loss ratio of shrinkage- compensating concrete 1. 62%; compressive strength decreased 30. 3%; and relative elasticity modulus decreased 64. 8%.Three test parameters indicate that adding expanding agent contributes to enhance the resistant ability of concrete to freeze thawing and improves the damage degree of concrete structure. These results reflect that the reinforcing mechanism of expanding agent to concrete.

关 键 词：补偿收缩混凝土 冻融循环 动弹性模量 抗冻性能 

分 类 号：TU528.55[建筑科学—建筑技术科学]