Permeable crystalline waterproof coating

Abstract

The invention discloses a permeable crystalline waterproof coating, which is prepared from the following components in percentage by weight: 30 to 65 percent of portland cement, 24 to 36 percent of quartz sand, 5 to 16 percent of filler, 1 to 4 percent of calcium ion compound, 1.5 to 4 percent of crystal precipitator, 1.5 to 3 percent of complexing aid, 1 to 3 percent of film forming aid, 0.4 to 1.6 percent of complexing agent, 0.4 to 2 percent of polycarboxylic acid water reducer and 0.2 to 0.4 percent of methylcellulose. The permeable crystalline waterproof coating has good penetration, and can grow insoluble crystals in capillary pores and microcracks on the surface of the concrete to block the capillary pore channels and the microcracks so as to improve the permeability of the concrete and fulfill the aims of resisting water and blocking leakage. The permeable crystalline waterproof coating can be widely applied to anti-permeability and waterproof construction of cellars, tunnels, subways, swimming pools, roof squares, toilets and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to a composition, in particular to a permeable crystalline waterproof coating for building waterproofing. Background technique [0002] Concrete is a heterogeneous, porous, highly permeable material with a microscopic crack structure and a rough surface. It absorbs water through capillaries, which is often accompanied by the adsorption of harmful substances. As far as water is concerned, water can cause frost and thawing of materials. If it is eroded by moisture in the air for a long time, it will cause the substrate to suffer from high stress of alternating dry and wet, causing surface cracks, and the generation and development of cracks will lead to harmful substances. Intrusion; substances dissolved in water, especially chloride ions, will destroy the passivation layer on the surface of steel bars, causing catastrophic corrosion; water can entrain pollutants and dust to ...

AI Technical Summary

Problems solved by technology

However, because the concrete surface is covered and the pores are blocked, it is airtight. When the moisture is discharged from the inside, the waterproof coating on the surface will be broken, resulting in shortening of the coating and its life.

In addition, these traditional waterproof materials have their own shortcomings that are difficult to overcome, such as aging, fading and peeling when exposed to the natural environment for a long time, poor alkali resistance, low adhesion, poor durability, and easy to absorb dust, etc.

In recent years, a new type of permeable crystalline waterproof coating has been widely used. It has the advantages of strong self-healing ability, good permeability, high bonding strength, and simple construction. This type of waterproof coating is cement-based waterproof coating, mainly composed of cement, quartz Sand and active chemical substances, among which there are many types of active chemical substances, such as organic silicon particles, fatty acids, potassium permanganate, sodium carbonate and other substances, but most of these substances have certain corrosion on the steel bars in mortar or concrete role, and the introduction of a large amount of metal potassium, sodium, etc. will enhance the alkali-aggregate reaction of mortar or concrete, resulting in a decrease in its own inherent strength

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