Preparation method of mortar concrete waterproof agent

Abstract

The invention discloses a preparation method of a mortar concrete waterproof agent, which comprises the following steps: preparing an emulsion with an organosilicon core-shell structure by an acrylic acid unsaturated monomer, unsaturated fatty acid and a nonsaturated organosilicone compound through soap-free polymerization, then adding 10-30 parts of water, 2-5 parts of concrete shrinkage reducing agent, 0.2-1 part of antifoaming agent, 5-15 parts of water reducer, 1-3 parts of cement hydration promoter, 10-20 parts of lithium compound and 0.5-1.5 parts of air-entrainer in 40-60 parts of emulsion with an organosilicon core-shell structure in order, and uniformly mixing. According to the invention, a core-shell spherical particle polymer with nano size can be prepared, and the compound containing the shrinkage reducing agent, the air-entrainer and the lithium salt with different functions is composited with the polymer, so that the obtained waterproof agent can greatly enhance the impermeability, waterproofness and durability of a water proof layer, cracking is avoided, toughness is enhanced, construction is simple, the opening time is short, preparation process is safe and nontoxic, production is simple, no environmental pollution is generated, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of preparation of concrete waterproofing agent, in particular to a preparation method of mortar concrete waterproofing agent. Background technique [0002] Waterproof engineering occupies a very important position in construction engineering. In the practice of construction engineering, quality accidents caused by unreasonable waterproof engineering design, improper material selection, and rough construction are not uncommon, and light ones cause roof and joint leakage and paint peeling off; Seriously, it causes underground works to be submerged in water, and even buildings collapse, causing losses to state property and endangering people's lives. Therefore, the waterproofing project must be implemented and guaranteed with high quality. [0003] The quality of waterproof materials is one of the most critical links for high-quality implementation and protection of waterproof projects. After years of develop...

AI Technical Summary

Problems solved by technology

However, it is a pity that although the current waterproofing agent market has many product specifications, the products are not only chaotic in price, but also have great defects in quality, which greatly affects the use effect

For example, fatty acid salts are added to some waterproofing agent products during preparation, which will reduce the strength of mortar and concrete layers by about 25%; The waterproofing agent reduces the strength of the waterproof layer by at least 26%. The method of adding a water reducing agent to reduce the water consumption is used to increase the strength. Although the effect is achieved, the workability of the water reducing agent and mortar concrete is actually strict. control, so that the waterproofing agent prepared by this method is not desirable in engineering applications

There are also small molecular organosilicon compounds added to the prepared waterproofing agent products (Guo Qingzhong. Research and Development of Organosilicon Fluorine Building Waterproof and Dustproof Materials. Postdoctoral Dissertation of Sun Yat-Sen University. 2007), which not only makes the formed waterproof layer resistant The alkaline performance is very poor, resulting in a short life of the waterproof layer, and at the same time greatly delaying the opening time of the construction, the formed waterproof layer sometimes does not harden for two days

Another example is the technical solution disclosed in Chinese patent CN103073214A, which simply adds inorganic silicon compounds, expansion agents, inorganic aluminum salts and other substances to the waterproofing agent during preparation to exert the effect of filling and compacting. The range of use of these products Limited, poor waterproof and impervious properties, poor durability of waterproof layer, easy to crack

In addition, although the silicone waterproof emulsion prepared by foreign giants such as Wacker and Degussa has good performance, the price is high, which is not conducive to promotion

[0004] Therefore, the construction waterproof layer strength that the existing method prepares water-repellent product exists is low, open time is long, waterproof performance is poor, life-span is short, price is high, production and construction process are complicated etc., just become the bottleneck that urgently needs to be solved in the popularization of waterproofing agent question

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