Moisture-proof and alkali-proof backwater putty paste as well as preparation method and application thereof

The invention relates to the technical field of building materials, and discloses moisture-proof and alkali-proof backwater putty paste as well as a preparation method and application thereof. The moisture-proof and alkali-proof backwater putty paste comprises the following raw materials in parts by mass: 20-40 parts of Portland cement, 10-20 parts of composite calcium carbonate, 5-15 parts of modified silica fume, 20-40 parts of silicon dioxide, 1-10 parts of cellulose, 1-10 parts of latex powder, 1-5 parts of capillary crystalline, 1-5 parts of a lubricant and 1-5 parts of a water reducing agent. The moisture-proof and alkali-resistant backwater putty paste prepared by the invention can achieve an alkali-resistant effect by adopting a pickling base layer when being directly painted on a wall body. 本发明涉及建筑材料技术领域，公开了一种防潮防反碱的背水腻子膏及其制备方法和应用。本发明一种防潮防反碱的背水腻子膏，包括以下质量份原料：硅酸盐水泥20～40份、复合碳酸钙10～20份、改性硅灰5～15份、二氧化硅20～40份、纤维素1～10份、乳胶粉1～10份、渗透结晶1～5份、润滑剂1～5份和减水剂1～5份。本发明制备的防潮防反碱的背水腻子膏能够在直接粉刷于墙体时，达到采用酸洗基层的防反碱效果。