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混凝土表面硅烷浸渍及其长期防护效果研究进展
作者:李克非1??炜1??睿2?
单位:(1.?清华大学土木工程系?北京?100084?2.?清华大学化学工程系?北京?100084)?
关键词:混凝土?硅烷浸渍?吸水性?老化机理?耐久性?
分类号:TU5
出版年,卷(期):页码:2019,47(8):0-0
DOI:
摘要:

?综述了硅烷材料对混凝土材料表面憎水处理的基本原理,硅烷浸渍对混凝土材料吸水性等物理性质的影响,硅烷浸渍材料的长期老化机理、老化实验室表征,实际工程对硅烷浸渍憎水性的长期观测,以及规范标准层次上对硅烷浸渍的技术要求与耐久性寿命设计。现有的科学认识、试验结果和长期工程观测表明:异丁(辛)基三乙氧基硅烷可有效降低混凝土表面与液态水相关的传输,但在外部水压作用下憎水性会失效;与长期维护相关的碳化后混凝土硅烷浸渍特性相关研究有待开展;硅烷浸渍的长期老化可能存在光氧老化和碱老化等机理,红外光谱和气相色谱是主要表征手段,相关的定量研究尚有不足;硅烷浸渍已经为工程广泛使用、并进入了技术标准,但相应的定量寿命设计与评估技术有待完善。

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基金项目:
国家重点研发计划(2017YFB0309904);浙江省交通厅交通工程建设科研计划项目(2018035)。
作者简介:
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