高吸水树脂内养护对水泥基材料性能的影响  

Effects of internal curing by superabsorbent polymers on performance of cement based materials

作　　者：王文彬 郭飞 李磊 王育江 刘加平[2] 

机构地区：[1]江苏苏博特新材料股份有限公司,江苏南京211103 [2]江苏省建筑科学研究院有限公司高性能土木工程材料国家重点实验室,江苏南京211103

出　　处：《混凝土》2014年第10期86-88,共3页Concrete

基　　金：国家自然科学基金(青年基金)(51108213);江苏省自然科学基金(BK2012866)

摘　　要：高吸水树脂(SAP)被认为是一种非常具有前景的内养护材料,用于降低水泥基材料自收缩;考察了一系列具有不同吸液倍率、尺寸的SAP内养护材料对水泥基材料自收缩及强度的影响。试验结果发现:SAP抑制自收缩与自身吸液倍率和尺寸相关;SAP尺寸越大、吸液倍率越高,抑制自收缩效果越明显。另外,SAP的添加不会对强度带来负面影响;扫描电镜(SEM)结果显示,掺加SAP后会在水泥基体中形成球形的孔洞。Superabsorbent polymers（SAP）are considered as promising material for internal curing of cement-based materials.In this paper,SAP with different water absorption and size were selected to discuss their effect on autogenous deformation and strength of cement based materials.Results indicated that SAP with large-size and high-water absorption had positive effect on autogenous shrinkage reduction.The influence of SAP on mechanical properties revealed that SPA seemed to have no negative effect on the strength.Scanning electron microscope（SEM）images showed that voids were formed in the hardening cement based materials.

关 键 词：高吸水树脂(SAP) 内养护 自收缩 

分 类 号：TU528.064[建筑科学—建筑技术科学]