Preparation method of high-efficiency compound waterfroof agent for mortar and concrete

Abstract

The invention discloses a preparation method of a high-efficiency compound waterfroof agent for mortar and concrete. The high-efficiency compound waterfroof agent comprises, by mass, 80-90 parts of sodium aliphatate, 0.3-0.4 parts of sodium hydroxide, 0.4-0.5 parts of potassium dichromate, 0.05-0.1 parts of sodium dodecyl benzene sulfonate, 0.3-0.5 parts of tributyl phosphate and the balance water. The preparation method comprises according to a use amount, heating weighed water to a temperature of 60-70 DEG C, calculating weights of other ingredients according to a raw material ratio, adding sodium aliphatate into the heated water to obtain an emulsion, orderly adding other raw materials into the emulsion, adjusting pH of the emulsion, and carrying out cooling, drying and crushing. Through use of the waterfroof agent in mortar or concrete, in cement hydration, the waterfroof agent, a cement hydration group, aggregates and uncompletely hydrated cement particles undergo complex chemical crosslinking reactions and physical riveting so that a building service life is prolonged and good waterproof effects are obtained.

Description

technical field [0001] The invention relates to the technical field of improving the waterproof performance of concrete, and more specifically relates to a preparation method of a high-efficiency composite mortar and a waterproofing agent for concrete. Background technique [0002] Existing waterproofing agents can be roughly divided into two types: [0003] 1. Penetrating waterproofing agent (organic silicon waterproofing agent), this traditional treatment method only waterproofs the surface of mortar and concrete, and the penetration depth of waterproofing agent is limited, so it is difficult to achieve a good and long-term waterproofing effect; built-in waterproofing Agents (inorganic aluminate waterproofing agents, iron oxide waterproofing agents) have serious defects, or contain harmful ions to corrode building structures, or increase material brittleness, reduce material strength, or are not resistant to aging, etc. In short, there are obvious shortcomings , the water...

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Problems solved by technology

Its surface is in contact with the aqueous solution, and the solution will be adsorbed on the surface of the mortar through capillary action, and further penetrate into the interior of the mortar; at the same time, harmful substances in the solution, such as chloride ions, sulfate ions, etc., will also enter the interior of the mortar with the solution, and continue to The inward erosion damage will cause irreversible damage to the main structure of the building and reduce the service life of the building

[0004] 2. The waterproof effect of permeable waterproofing agent floats on the surface, and the waterproofing effect is not ideal in some special cases; the built-in waterproofing agent itself contains harmful ingredients, which will damage the performance of building materials and affect the life of the building

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