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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

DOI: 10.14062/j.issn.0454-5648.2015.08.12

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Abstract:

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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