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分别采用吸水量试验和内部Cl-含量测试来研究表面硅烷浸渍后混凝土复合体系的海洋服役行为;基于相似性原理,采用室内加速试验模拟海洋环境的盐雾区、干湿区和海水区。试验结果表明:与未实施硅烷浸渍的空白试件相比,各环境下硅烷浸渍复合体系均大大降低混凝土吸水量和混凝土内部Cl-含量,且环境越恶劣,其效果越明显;但硅烷浸渍混凝土复合体系的氯离子含量与吸水量大小与基层混凝土水灰比的关系是非线性关系,这表明硅烷与基层混凝土具有一定的匹配性;若对试件进行多道硅烷涂刷时,硅烷防护效果更取决于第1道的涂刷质量;此外微区环境对硅烷浸渍混凝土复合体系的影响能力不一,干湿区最大,海水区次之,盐雾区最小。
The water service test and the internal Cl-content test were used to study the marine service behavior of the composite system after the surface silane impregnation. Based on the similarity principle, indoor accelerated tests were conducted to simulate the salt spray zone, wet-dry zone and seawater zone of the marine environment. The experimental results show that compared with the blank samples without silane impregnation, the silane-impregnated composite systems in all environments greatly reduce the water absorption of concrete and the content of Cl- in concrete, and the worse the environment, the more obvious the effect is. However, silane-impregnated concrete The relationship between chloride ion content and water absorption capacity of the composite system and the water-cement ratio of the grassroots concrete is non-linear, which shows that there is a certain match between the silane and the grassroots concrete; if more silane brushing is applied to the specimen, the silane protection effect is more Depending on the quality of brushing on the first track; in addition, the micro-environment has different ability to influence the silane-impregnated concrete composite system, with the largest in wet and dry areas, the second in seawater areas and the smallest in salt fog areas.