张鹏,代思源,吕亚军,王娟

• 1:郑州大学水利科学与工程学院
• 2:华北水利水电大学建筑学院

摘要(Abstract)：

为研究有机涂层对水泥基复合材料耐久性的影响,采用成膜型的氯化橡胶涂料和聚氨酯涂料以及渗透型的有机硅烷浸渍剂对纳米SiO_2和PVA纤维增强水泥基复合材料进行不同的表面防护处理,并对防护后的试件进行加速碳化、氯离子渗透和抗渗性能研究。试验结果表明:经过氯化橡胶、聚氨酯和硅烷涂层防护后,水泥基复合材料的28 d加速碳化深度较未经防护时分别降低了约61%、65%和17%,抗碳化性能有所提高,成膜型涂层的抗碳化效果较为显著。防护后材料非稳态氯离子扩散系数分别降低了约37%、44%和42%,抗氯离子渗透性能均有所增强。在进行毛细吸水试验时,经渗透型硅烷防护的试件渗水高度降低了约73%,经成膜型氯化橡胶和聚氨酯防护试件渗水高度分别降低了约15%和51%,渗透型硅烷防护效果较好。在进行静水压力为1.2 MPa的抗渗性能试验时,硅烷防护试件渗水高度降低了约31%,氯化橡胶和聚氨酯防护试件渗水高度分别降低了约39%和49%,成膜型聚氨酯涂层防护效果较好。当增加防护次数时,有机涂层防护效果均有所提升。

关键词(KeyWords)： 有机涂层;水泥基复合材料;抗碳化性能;抗渗性能;混凝土;影响因素

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51779096);; 河南省高校科技创新团队支持计划(20IRTSTHN009);; 河南省高等学校青年骨干教师培养计划项目(2019GGJS009)

作者(Author): 张鹏,代思源,吕亚军,王娟

DOI: 10.13928/j.cnki.wrahe.2021.04.024

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