Modified sulfoaluminate cement waterproof material and preparation technique thereof

Abstract

The invention discloses a modified sulfoaluminate cement waterproof material and a preparation technique thereof. The modified sulfoaluminate cement waterproof material comprises, by weight, 100 partsof sulfoaluminate cement, 20-30 parts of silicone-acrylic emulsion, 15-25 parts of fluorine-bearing polyacrylate emulsion, 0.6-1.4 parts of isopropyl tris(dioctyl pyrophosphate)titanate, 50-70 partsof quartz powder, 1-3 parts of a water reducer, 0.8-2 parts of an ultraviolet absorbent, 30-40 parts of lithium silicate, 20-30 parts of nitrilotriacetic acid, and 15-25 parts of barium chloride. Thepreparation technique comprises: adding isopropyl tris(dioctyl pyrophosphate)titanate into sulfoaluminate cement, stirring for 1 h, heating resultant with silicone-acrylic emulsion and fluorine-bearing polyacrylate emulsion to 60-80 DEG C, holding the temperature, stirring for 3-5 h to obtain modified sulfoaluminate cement, and mixing well the modified sulfoaluminate cement with the rest materialsto obtain the above waterproof material. JS Waterproof coating and cement-based permeable crystal waterproof material are integrated and complement each other, the produced novel waterproof materialis highly adaptive to temperature, humidity and other external force majeure, and has high toughness and ductility.

Description

technical field [0001] The invention relates to the field of cement-based waterproof materials, in particular to a modified sulphoaluminate cement waterproof material and a preparation process thereof. Background technique [0002] Cement-based permeable crystalline waterproof coating is a waterproof material with cement, quartz sand, and active masterbatch as the main raw materials. It uses water as the carrier to transport and fill in the concrete micropores and capillaries, and undergo physical and chemical reactions to form insoluble The dendritic crystals of water achieve the effect of permanent waterproof, chemical corrosion resistance and strengthening the strength of concrete structure, but the generated crystals are extremely sensitive to factors such as temperature, humidity, mechanical vibration, etc. Once the external factors change, the crystals may break and open The waterproof channel loses its waterproof function, and the ductility of the rigid waterproof mat...

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Problems solved by technology

[0002] Cement-based permeable crystalline waterproof coating is a waterproof material with cement, quartz sand, and active masterbatch as the main raw materials. It uses water as the carrier to transport and fill in the concrete micropores and capillaries, and undergo physical and chemical reactions to form insoluble The dendritic crystals of water achieve the effect of permanent waterproof, chemical corrosion resistance and strengthening the strength of concrete structure, but the generated crystals are extremely sensitive to factors such as temperature, humidity, mechanical vibration, etc. Once the external factors change, the crystals may break and open The waterproof channel loses its waterproof function, and the ductility of the rigid waterproof material and the adaptability of the base layer are poor, and it is easy to break and crack

[0003] The patent application number is CN201210304851.6, which discloses cement-based permeable crystalline waterproof material, which is prepared by mixing ordinary Portland cement, low-alkalinity sulphoaluminate cement, quartz sand, anhydrous sodium carbonate acne and other raw materials. The material, anhydrous sodium carbonate acne, under the action of water, can combine with metal ions in concrete to form carbonate crystals, but when the water level in concrete drops, the carbonate crystals dry and shrink, forming new water passages, When the water level rises again, it cannot be activated again, and the ductility and toughness of the waterproof material are poor

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