聚合物改性超细水泥修补混凝土结构物微裂缝的性能及机理

利用具有柔性、双组分防水及粘结性能的聚合物乳液S400改性超细水泥（PMSC），制备了水泥混凝土结构物微裂缝修补材料，并对其力学性、界面粘结性、耐久性等进行了研究，同时借助于多种现代物相测试分析技术对PMSC结构形成过程及改性机理进行了深入分析。研究表明：聚合物的填充和密封作用使PMSC界面过渡区结构明显细化，孔隙率减小，孔级配趋于合理，加之亲水性聚合物与水泥悬浮体的液相一起向基体的孔隙及毛细管内渗透，改善了新旧材料界面粘附状况，增强了柔韧性，提高了抗渗性及抗腐蚀性。

Performance and Mechanism of Polymer Modified Superfine Cement for Microcrack Mending of Concrete Structure

Polymer emulsion S400,which has flexibility and two-component water resistance and the bonding properties,were chosen to polymer modified superfine cement(PMSC) and prepared as the microcrack mending material for cement concrete structure,and its mechanical properties,interface bond property, endurance and so on were researched.At the same time,using many kinds of modern phase test analysis technologies,studies on the PMSC structure forming process and the modified mechanism were conducted through analysis.The research indicates that the polymer's filling and the seal function obviously refines the PMSC interface transition region structure;the porosity reduces;the pore gradation tends to be proper.Additionally,the hydrophilic polymer and the liquid phase of cement suspended solids permeated the pore and the capillary in basal body, which improved the adherent condition of new and old material's interface;strengthened the flexibility;enhanced the impermeability and the corrosion resistance.