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高性能水泥基材料内养护剂用高吸水树脂的研究进展
作者:马先伟1 2 张家科2 刘剑辉2 
单位:1. 河南城建学院 河南 平顶山 467036 2. 湖南大学土木工程学院 长沙410082 
关键词:内养护 高性能混凝土 水泥 高吸水树脂 
分类号:TU59
出版年,卷(期):页码:2015,43(8):1099-1110
DOI:10.14062/j.issn.0454-5648.2015.08.12
摘要:

 高吸水树脂(SAP)在高性能和超高性能混凝土内养护效果方面的优越性已得到认同。混凝土中掺加SAP 对其内部湿度、水化程度、自收缩和耐久性具有积极作用,但对流动性和强度有不利影响。为了更好研究和利用SAP 的内养护效果,本文综述了SAP 的种类、吸/释水过程对混凝土内部湿度、孔结构和性能影响等方面的研究进展,认为SAP 引水量在水泥水化程度、自收缩与强度之间的平衡点和SAP 孔与毛细孔的连通性是评价其总体作用效果的关键点,并且SAP 分子结构设计、在水泥浆体中吸液动力学、颗粒尺寸与覆盖范围的关系、饱和度和内养护水可利用性的关系需要进一步研究。

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The superiority of superabsorbent polymer (SAP) as an internal curing agent of high or ultra-high performance concretewas represented. The SAP has a positive effect on the concrete internal humidity, hydration degree, autogenous shrinkage anddurability, but has a negative effect on the fluidity and compressive strength. In this paper, the relevant results on the type and thewater absorption/release process of SAP, and the effect of SAP on the internal humidity, pore structure and performance of concretewere summarized. The evaluation on the overall effect of SAP should consider the connectivity of SAP pore and capillary pores, andthe amount of SAP entrained water meeting cement hydration degree, autogenous shrinkage and compressive strength. Some aspectson the design of the molecular structure of SAP, dynamically simulation of the water absorption and release process of SAP in cementpaste, and the establishment of their relationships need to be further studied.

基金项目:
国家自然科学基金(U1305245);同济大学先进土木工程材料重点实验室开放基金;河南省青年骨干教师资助计划(2012GGJS-176)。
作者简介:
第一作者:马先伟(1977—),男,博士,副教授。
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