Cement-based capillary crystalline waterproof material and preparation method thereof: Fid-Bau Portal

Cement-based capillary crystalline waterproof material and preparation method thereof

XU GELONG / CAI JIWEI / LIU ZIXIAN / GAO YAOMIN / SUN MENGGE / HAO MINGYUE / LIU RUIXUE

The invention provides a cement-based capillary crystalline waterproof material and a preparation method thereof, and belongs to the technical field of waterproof materials. The ratio of sulfur in the dihydrate gypsum to aluminum in the cement is adjusted by controlling the addition amount of the dihydrate gypsum and the cement, so that the volume stability is regulated and controlled, a gelling matrix material (more AFm is formed in the early stage) taking AFm as a main crystallization product is prepared, and the AFm is denser in microstructure compared with AFt and has the key purpose of curing heavy metal ions; the ferrite is introduced to inhibit the conversion of the generated AFm to AFt, so that the volume deformation is inhibited; the organic aid polyacrylamide or maleic anhydride is added to improve the compactness of the gelling matrix material; the epoxy resin is added, so that internal pores of the material can be further filled, the compactness is improved, the anti-permeability is improved, and the anti-cracking performance of the gelling base material is improved, so that water cannot permeate, and the purposes of preventing water and protecting the base material are achieved.

本发明提供了一种水泥基渗透结晶型防水材料及其制备方法，属于防水材料技术领域。本发明通过控制二水石膏和水泥的加入量来调整二水石膏中的硫和水泥中的铝的比例从而调控体积稳定性，制备出以AFm为主要结晶产物的胶凝基体材料(早期形成更多AFm)，AFm在微观结构上较AFt更加密实，且具有固化重金属离子的关键用途；引入亚铁盐，抑制生成的AFm向AFt转化，从而抑制体积变形；加入有机助剂聚丙烯酰胺或马来酸酐提高胶凝基体材料的密实性；加入环氧树脂，可进一步填充材料内部孔隙，提高密实度，提高抗渗性，提高胶凝基体材料的抗裂性能使得水分无法渗入，从而达到防水、保护基体材料的目的。

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