Energy-saving environmental-protection thickener for mortar preblending and dry-mixing

Abstract

The invention relates to a building material, particularly a necessary admixture for mortar preblending and dry mixing. The energy-saving environmental-protection thickener for mortar preblending and dry-mixing is prepared from the following materials in percentage by weight: 30-40% of bentonite tailings, 10-15% of zeolite powder, 10-15% of fly ash, 10-15% of ore slag micropowder, 3-8% of calciumhydroxide powder, 3-8% of gypsum powder, 1-5% of starch ether, 2-5% of lignosulphonate and 2-4% of polycarboxylate multipolymer. The thickener is prepared by the following steps: electronically weighing the materials according to the preset proportion, and evenly and mechanically stirring by using a zero-gravity double-shaft mixing machine. The product has the advantages of favorable sagging resistance, moisture retention, workability, plastic reduction and seepage resistance.

Description

technical field [0001] The invention relates to a building material, in particular to an admixture used in ready-mixed dry-mixed mortar. Background technique [0002] With the further development of the country's economic construction, China has become the world's construction site. The heavy energy burden and serious environmental pollution have become prominent problems restricting the sustainable development of our country. With the extensive use of some new wall materials in construction projects, The country attaches great importance to building energy conservation, and self-mixed mortar on site can no longer meet the project quality and construction requirements. Energy-saving and consumption-reducing development of building dry powder is urgent, in line with the national sustainable development strategy, and is listed as one of the key development and development projects by the country. The energy-saving and environmentally friendly mortar thickener is designed to pr...

AI Technical Summary

Problems solved by technology

Cement mortar has poor water retention and workability, and a large amount of cement is used, which is easy to hollow and crack

Add chemical water-retaining agent (mainly cellulose ether) or add air-entraining materials (lime king, etc.) on site to improve operational performance, these materials will generate air bubbles in the mortar mixture, reduce the strength of the mortar, and easily seep water , poor freeze-thaw resistance, affecting the durability of buildings

Lime mixed mortar uses lime as the water-retaining thickening material, which has poor water resistance and cannot be used below the ±00 line, and lime production consumes a lot of energy, causing serious air pollution and greenhouse gas emissions

At present, the water-retaining and thickening materials used in self-mixed mortar on site will affect the quality and service life of buildings.

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