Water-retaining, thickening and reinforcing additive for cement mortar and cement mortar containing additive

Abstract

The invention discloses a water-retaining, thickening and reinforcing additive for cement mortar and cement mortar containing the additive, wherein the additive is corn straw cellulose or/and modified corn straw cellulose. The water-retaining, thickening and reinforcing additive for cement mortar and the cement mortar containing the additive, disclosed by the invention, have the beneficial effects that the water-retaining, thickening and reinforcing additive for cement mortar is a green environment-friendly product which is free from toxicity, peculiar smell, pollution and corrosivity; if the water-retaining, thickening and reinforcing additive for cement mortar, disclosed by the invention, is doped into cement mortar, the water-retaining property of mortar can be effectively improved; the water-retaining property of freshly mixed mortar is more than 90% and meets standard requirements; simultaneously, the intensity of mortar is obviously increased; the use amount of cement is effectively reduced; the intensity of mortar is increased by above 25%; the 14d tensile adhesive intensity is increased by above 13%; the cost of the water-retaining and thickening material is reduced by above 16%; a utilization way of the industrial by-product, namely cellulose, separated from corn straws, is effectively provided; furthermore, the utilization value is higher. The cost of the water-retaining, thickening and reinforcing additive for cement mortar, disclosed by the invention, is 4000-8000 yuan/ton, and the water-retaining, thickening and reinforcing additive for cement mortar, disclosed by the invention, is wide in source of used raw materials, proper in cost, convenient to use, high in operability and beneficial to popularization.

Description

technical field [0001] The invention belongs to the technical field of building materials, and particularly relates to a water-retaining, thickening and reinforcing additive for cement mortar. Background technique [0002] Cement mortar is a building material with a large amount and a wide range of uses in construction projects. It is mainly used for the masonry of masonry structures and the plastering of interior and exterior walls of buildings. At present, the commonly used water-retaining and thickening materials in cement mortar are cellulose. Ether-based, expensive, cellulose ether will greatly reduce the mortar strength while retaining water and thickening to improve the workability of the mortar. The amount of water causes the mortar to shrink and crack due to water loss. SUMMARY OF THE INVENTION [0003] In order to solve the problems of high cement consumption, high water demand, easy cracking of the mortar and high cost in the mortar, the present invention provi...

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Problems solved by technology

[0003] In order to solve the problems of high cement consumption, high water demand, easy cracking of mortar and high cost in mortar, the present invention provides a water-retaining thickening and enhancing additive for cement mortar, which can not only improve the water-retaining performance of mortar, but also improve workability , and can greatly improve the thixotropic performance of the mortar mixture, and the mortar added with the additive of the present invention has high compressive strength, enhances the adhesion with the base wall surface, improves the bonding strength of the mortar, and reduces the shrinkage of the mortar. Avoid mortar cracking and also reduce costs

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