Compound concrete penetrating crystallization liquid and preparation method thereof

Abstract

The invention discloses compound concrete permeating crystallization liquor and a preparation method thereof. The compound concrete permeating crystallization liquor is prepared from the following raw materials in percentage by weight: 35% of lithium silicate, 15% of silica sol, 10% of sodium fluorosilicate, 0.4% of high-activity nano titanium dioxide, 0.6% of a nano nickel-titanium alloy, 1.5% of a surface active wetting agent, 3.5% of a water repellent agent and 34% of water, wherein the lithium silicate is slightly milky white SiO2 transparent liquid in a crystalline state, has a pH value of 11, SiO2 content of 29-31%, density of 1.12-1.14g / m<2>, and a grain size of 8-15 nm; the silica sol is silica sol for paint; the high-activity nano titanium dioxide is white powder and hydrophilic in surface, has a pH value of 6-8, an anatase crystal form and a grain size of 5nm; the nano nickel-titanium alloy has a grain size of 50 nm. The compound concrete permeating crystallization liquor has the advantage that the service life of the concrete is prolonged, and the functionality and the aesthetic sense are kept for a long time.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials, and in particular relates to a compound concrete penetrating crystallization liquid acting on the surface of concrete and a preparation method thereof. Background technique [0002] Concrete consists of coarse granular aggregates and cement hydrates. When concrete is poured, the concrete components and water undergo a complex chemical reaction to form hard hydrates to bond the aggregates together to form a compressive overall structure. Due to the natural formation process of concrete hardening, the solidified concrete has inevitable shortcomings , There are a large number of interconnected pores in the solidified concrete structure. The greater the slump of the paste concrete, the more and larger the dehydration pores after solidification. Carbon dioxide, sulfur dioxide, nitrogen oxides, chlorine, salt and water in the environment Elements enter the interior of the concrete ...

AI Technical Summary

Problems solved by technology

When concrete is poured, the concrete components and water undergo a complex chemical reaction to form hard hydrates to bond the aggregates together to form a compressive overall structure. Due to the natural formation process of concrete hardening, the solidified concrete has inevitable shortcomings , There are a large number of interconnected pores in the solidified concrete structure. The greater the slump of the paste concrete, the more and larger the dehydration pores after solidification. Carbon dioxide, sulfur dioxide, nitrogen oxides, chlorine, salt and water in the environment Elements enter the interior of the concrete through capillary pores, and reactions such as alkali carbon and alkali silicon occur inside, corroding the steel bars in the concrete structure and causing volume expansion, causing the concrete structure to be damaged, eroded, and deteriorated, resulting in a decrease in strength, which seriously affects the structural safety of the concrete The service life of concrete projects is about 60-100 years, but some concrete projects start to be repaired due to weathering and peeling less than 20 years. High density, poor impermeability, easy to be eroded by external substances and damaged, so that its performance is drastically reduced