Quick-setting cement-based capillary crystalline waterproof material and preparation method thereof

Abstract

The invention discloses a quick-setting cement-based capillary crystalline waterproof material and a preparation method thereof. The quick-setting cement-based capillary crystalline waterproof material comprises the following raw materials in parts by mass: 20 to 30 parts of sulphate aluminium cement with the particle size of 20 to 35 [mu] m, 10 to 15 parts of sulphate aluminium cement with the particle size of 3 to 10 [mu] m, 25 to 40 parts of quartz sand with the particle size of 40-80 [mu] m, 15 to 20 parts of quartz sand with the particle size of 10-30 [mu] m, 8 to 12 parts of an active master batch, 3-7 parts of a crystal nucleus type early strength agent, 0.5-2.5 parts of a polycarboxylate superplasticizer, 0.4-0.7 part of hydroxyethyl methyl cellulose and 1-2 parts of redispersiblelatex powder; wherein the active master batch is prepared from the following components in percentage by mass: 10 to 15 percent of potassium fluoride, 10 to 15 percent of tetrasodium aminotrimethylenephosphonate, 20 to 25 percent of sodium phosphate, 10 to 15 percent of sodium oxalate, 10 to 15 percent of magnesium sulfate and the balance of sodium silicate. The quick-setting cement-based capillary crystalline waterproof material can be rapidly hydrated during construction at the temperature of 0-10 DEG C, final setting is completed within 20 hours, the early strength is improved, and the repeated anti-seepage crystallization and repeated repairing effects are achieved.

Description

technical field [0001] The invention belongs to the technical field of osmotic crystalline waterproof materials, in particular to quick-setting cement-based osmotic crystalline waterproof materials and a preparation method thereof. Background technique [0002] The active chemical substances dissolved in the cement-based penetrating crystalline waterproof coating permeate and diffuse in the concrete with the surface water, and the Ca in the concrete 2+ 、Al 3+ A chemical reaction occurs to form dendritic crystals that are insoluble in water. The crystals are filled with capillary pores and combined with concrete to form a closed and dense waterproof structure. It will also produce crystallization to repair and heal itself. However, when the cement-based permeable crystalline waterproof coating is applied at a temperature of 0-10°C, the hydration rate is extremely slow. Therefore, the water storage time in the concrete mortar is too long, so that the active substances can fu...

AI Technical Summary

Problems solved by technology

However, when the cement-based permeable crystalline waterproof coating is applied at a temperature of 0-10°C, the hydration rate is extremely slow. Therefore, the water storage time in the concrete mortar is too long, so that the active substances can fully contact with the water, so that the active substances can be absorbed in the cement water. It will completely react during the melting process, lose the secondary anti-seepage crystallization effect, and the concrete structure will be damaged or cracks will appear in the later stage, which cannot be repaired and healed by itself. under construction

Images