A surface protective agent suitable for hydraulic concrete in alpine regions and its preparation method

Abstract

The invention relates to a composite surface protection agent for hydraulic concrete in alpine regions and a preparation method thereof. The composite surface protection agent includes component A and component B, and component A includes Portland cement 300 in parts by weight ~500 parts, 200~450 parts of quartz sand, 50~150 parts of heavy calcium powder, 10~100 parts of coating grade talc powder, 10~80 parts of osmotic crystallization agent, 0.5~2 parts of cellulose ether, component B by weight It includes: 50-200 parts of polymer emulsion, 0.2-3 parts of polycarboxylate water reducer, and 1-5 parts of defoamer. Stir component A and component B evenly, and add an appropriate amount of water to mix and stir until a viscous slurry is obtained. Adjust the amount of water to apply by scraping, brushing or spraying. The composite protective agent provided by the invention overcomes the shortcomings of traditional organic protective coatings such as poor compatibility with concrete bases, reduced adhesion, unstable performance, and high brittleness and easy cracking of inorganic materials. It is easy to construct, environmentally friendly and harmless, and economical. , suitable for hydraulic concrete surface protection in harsh environments in alpine regions.

Description

technical field [0001] The invention relates to the technical field of concrete structure surface protection, in particular to a composite surface protection agent suitable for hydraulic concrete in alpine regions and a preparation method thereof. Background technique [0002] The alpine region in western my country has a harsh natural environment, dry climate, high wind speed, low annual average temperature, large temperature difference between day and night, and strong ultraviolet radiation. These harsh environmental factors will have a great adverse effect on the pouring quality and service life of hydraulic concrete: the outer surface of the concrete is under the action of various natural factors such as constant dry and wet changes, temperature changes, freeze-thaw cycles, and wind erosion for a long time , can easily lead to defects such as cracks, leakage and freeze-thaw damage in hydraulic concrete structures. Leakage will also intensify the erosion of environmental...

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Problems solved by technology

[0007] In order to solve the deficiencies of the existing concrete surface protection technology, the purpose of the present invention is to provide a hydraulic concrete surface protection agent suitable for alpine areas, which can overcome the poor compatibility between the traditional organic protective coating and the concrete base, the decrease of adhesion, the Unstable performance and the shortcomings of inorganic rigid materials are brittle and easy to crack. It can strengthen the surface of concrete and improve the performance of concrete impermeability and frost resistance.

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