硅溶胶-异丁基三乙氧基硅烷复合乳液对泡沫混凝土防水性能的影响  

Effect of silica sol-isobutyltriethoxysilane composite emulsion on waterproof performance of foam concrete

作　　者：付静[1] 刘世豪 刘宇平 李学昭 FU Jing;LIU Shihao;LIU Yuping;LI Xuezhao(School of Architecture and Engineering,Zhejiang Changzheng Vocational and Technical College,Hangzhou 310000,China;Jiangxi Environmental Engineering Vocational College,Ganzhou 341000,China;School of Civil Engineering,Southeast University,Nanjing 210096,China;China Gezhouba Group Co.,Ltd.,Wuhan 430033,China)

机构地区：[1]浙江长征职业技术学院建筑工程学院,浙江杭州310000 [2]江西环境工程职业学院,江西赣州341000 [3]东南大学土木工程学院,江苏南京210096 [4]中国葛洲坝集团股份有限公司,湖北武汉430033

出　　处：《电镀与涂饰》2024年第6期77-84,共8页Electroplating & Finishing

基　　金：国家自然科学基金(52008089)。

摘　　要：[目的]研究硅溶胶-异丁基三乙氧基硅烷(IBTS)复合乳液对泡沫混凝土防水性能的影响,为拓宽其应用提供实验数据。[方法]通过宏观力学特性试验和微观结构分析,综合考察了该复合乳液对泡沫混凝土的防护效果。[结果]涂抹了复合乳液的泡沫混凝土表现出比涂抹了单一IBTS乳液的泡沫混凝土更优异的抗渗透性能和耐久性,其水渗透深度和碳化深度更小,浸水48 h后的吸水率为0.46%,氯离子迁移系数为1.1×10^(-12)m^(2)/s,冻融240次后的质量损失率为0.55%,且动弹性模量仍维持冻融试验前的85.34%。[结论]复合乳液的防水机理涉及表面效应、化学反应、物理效应等多个方面,通过形成致密的防水层、填充孔隙和微裂纹、吸附并包固水分子等方式来防止水分渗透和扩散,从而提高泡沫混凝土的防水性能。[Introduction]The effect of silica sol-isobutyltriethoxysilane(IBTS)composite emulsion on the waterproof performance of foam concrete was studied to provide experimental data for broadening its application.[Method]The protection effect of the composite emulsion on foam concrete was comprehensively analyzed by macroscopic mechanical property testing and microstructure characterization.[Result]The foam concrete coated with the composite emulsion showed better impermeability and durability than that coated with only IBTS emulsion due to the fact that the former had a less depth of water penetration and carbonation,a water absorption rate of 0.46%after 48 hours of immersion in water,and a chloride ion migration coefficient of 1.1×10^(-12)m^(2)/s.In addition,it lost only 0.55%of weight and maintained 85.34%of dynamic elastic modulus after 240 cycles of freezing/thawing test.[Conclusion]The waterproof mechanism of the composite emulsion involves many aspects such as surface effect,chemical reaction,and physical effect.Water penetration and diffusion through foam concrete are prevented after coating with the composite emulsion by forming a compact waterproof layer,filling pores and microcracks,as well as adsorbing and encapsulating water molecules.Therefore,the waterproof performance of foam concrete is improved.

关 键 词：泡沫混凝土 硅溶胶 异丁基三乙氧基硅烷 防水效果 

分 类 号：TU57[建筑科学—建筑技术科学]