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建筑自防水混凝土核心技术研究
作者：赵长才，郭玮
（苏州市姑苏新型建材有限公司，江苏 苏州 215129）
摘要：建筑自防水混凝土核心成分主要由活性硅、膨胀剂、减水剂等组成，详细论述了核心成分的研制过程。结果表明，按照胶凝材料质量的1.58%～2.15%掺加核心成分，配制的砂浆、自防水混凝土性能符合JC/T 474—2008《砂浆、混凝土防水剂》、GB 18445—2012《水泥基渗透结晶型防水材料》等的要求，一次抗渗压力达到1.1 MPa以上，一次抗渗压力比超过270%，二次抗渗压力达到0.9 MPa，混凝土自修复能力强。其次，自防水混凝土具有微膨胀性，有效防止早期或固化过程中混凝土的收缩开裂。
关键词：自防水混凝土；一次抗渗；二次抗渗；微膨胀
中图分类号：TU57+2 文献标识码：A 文章编号：1001-702X（2023）01-0105-04
Research on the core technology of self-waterproofing concrete for buildings
ZHAO Zhangcai，GUO Wei
（Suzhou Gusu New Building Materials Co. Ltd.，Suzhou 215129，China）
Abstract：The research process of the core components of building self-waterproof concrete is discussed in detail. It is mainly composed of active silicon，expansion agent，water reducing agent and other components. The test results show that the performance of mortar，self-waterproof concrete prepared by adding 1.58%～2.15% of the core components to the cementitious material meets the requirements of JC/T 474—2008 "Water-repellent admixture for mortar and concrete"，GB 18445—2012 "Cementitious capillary crystalline waterproofing materials". The primary impermeability pressure is above 1.1 MPa，the primary impermeability pressure ratio is over 270%，and the secondary impermeability pressure is 0.9 MPa，so the self-repairing ability of concrete is very good. In addition，self-waterproof concrete has micro-expansibility，which can effectively prevent the shrinkage cracking of concrete in the early stage or curing process.
Key words：self-waterproof concrete，the primary impermeability pressure，the secondary impermeability pressure，micro-expansibility