Quick-setting cement-based capillary crystalline self-repairing waterproofing material and preparation method therefor

Abstract

The invention discloses a quick-setting cement-based capillary crystalline self-repairing waterproofing material and a preparation method therefor. The quick-setting cement-based capillary crystalline self-repairing waterproofing material is prepared from the following ingredients in parts by weight: 55-75 parts of silicate cement, 25-45 parts of quartz sand, 3-10 parts of buffering agent, 4-12 parts of active ingredient A, 4-15 parts of active ingredient B, 2-6 parts of expanding agent, 1-12 parts of calcium ion supplement and 1-4 parts of water reducing agent. The waterproofing material disclosed by the invention is prepared by a simple physical mixing method, is short in initial setting time and low in chloride ion content and can infiltrate into the interior of a cement-based material to form crystals so as to block up microcracks, thus, the folding and compressing resistance and secondary infiltrating resistance are improved, and meanwhile, the cement-based material is endowed with long-lasting self-repairing performance and good waterproof and durable performance. In addition, the preparation method for the quick-setting cement-based capillary crystalline self-repairing waterproofing material is simple, has low requirements on equipment and processes and has very high application power.

Description

technical field [0001] The invention relates to the technical field of waterproof building materials, in particular to a quick-setting cement-based permeable crystalline self-repairing waterproof material and a preparation method thereof. Background technique [0002] Cement-based permeable crystalline waterproofing materials are referred to as CCCW (Cementitious Capillary Crystalline Waterproofing Materials), usually made of Portland cement or ordinary Portland cement, quartz sand, etc., mixed with active chemical substances. Because of its good impermeability and self-repair performance, and it can prevent the corrosion of steel bars and is harmless to the human body, cement-based permeable crystalline waterproof materials have been successively obtained in Europe, the United States, Japan, Singapore and other places since the product came out in the last century. Promote apps. After being introduced by our country in the 1980s, it has been applied to subways, bridge deck...

AI Technical Summary

Problems solved by technology

In addition, some domestic products use calcium chloride as a coagulant and calcium ion supplement for osmotic crystalline waterproof materials. Although calcium chloride can improve the early strength and antifreeze of the product to a certain extent, chloride ions will promote concrete Freeze-thaw and corrosion of steel bars will affect the durability of concrete and the life of buildings in the long run, so the chloride ion content of the product must be controlled

In the actual application process, the construction is often continued on the waterproof layer. The preparation of two-component permeable crystalline waterproof materials is troublesome, and most products do not take into account the influence of setting time.

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