自养护材料对高强膨胀混凝土性能的影响及机理分析  

Influence of Self-curing Materials on Properties of High Strength Expansive Concrete and Mechanism Analysis

作　　者：贾丽莉[1] 赵日煦[1] 吴雄[1] 黄义雄[1] 彭园[1] 杨龙[1] 

机构地区：[1]中建商品混凝土有限公司,武汉430074

出　　处：《混凝土与水泥制品》2015年第8期24-28,共5页China Concrete and Cement Products

基　　金：中建股份科技资助项目(CSCEC-2013-Z-31)

摘　　要：试验通过在高强混凝土内部引入自养护材料的方法,以达到降低混凝土自收缩,实现高强膨胀混凝土内养护的目的。通过采用高分子自养护材料SAP,研究了不同掺量及掺加方式对高强混凝土工作性能、力学性能和膨胀性能的影响,并分析其作用机理。SAP的最佳掺量为1‰,持续增加会显著降低工作性能、力学强度和膨胀性能;SAP采用附加水的方式掺入混凝土有利于提高混凝土膨胀性能,兼顾力学性能,其附加水量不宜过大。In order to achieve the purpose of reducing the self shrinkage of concrete and self-curing of high strength expansive concrete, the self-curing material is used into concrete. The effects of different dosage and mixing method on the workability, mechanical properties and expansive properties of high strength concrete are studied by using SAP. The best dosage of SAP is 1‰, and constantly adding SAP will significantly reduce the workability, mechanical strength and expansive properties of concrete. Using additional water mixed into concrete for SAP can improve the expansive properties and the mechanical performance of concrete, and the additional water content should not be too much.

关 键 词：高强膨胀混凝土 自养护 自由膨胀率 微观机理 

分 类 号：TU528.01[建筑科学—建筑技术科学]