Composite cement additive

Abstract

The invention discloses a composite cement additive. The cement additive is prepared by mixing, by weight, 16-22 parts of calcium hydroxide, 10-16 parts of isopropanol, 8-12 parts of zinc chloride, 2-8 parts of 2-methyl-dodecane-5-one, 4-10 parts of dodecyl dimethyl betaine, 2-6 parts of lignosulfonate, 1-5 parts of alkyl succinimide, 6-10 parts of acetophenone, 2-8 parts of ammonium sulfate, 4-10 parts of tetrabutylammonium borohydride, 5-9 parts of palmitic acid and 6-12 parts of stigmastenol. The prepared cement additive can increase cement yield and enhance cement strength, has small influences on early-stage compressive strength of cement, can meet engineering requirements, can improve cement mechanical properties and a pore structure, improves anti-freezing and grinding assisting performance of the cement, reduces permeability of the cement, adjusts cement setting time, increases concrete compactness, and achieves the functions of energy conservation and environmental protection. Compared with additives sold in the market, the cement additive is remarkable in performance improvement and has wide market popularization prospects.

Description

technical field [0001] The invention belongs to the technical field of cement additives, in particular to a composite cement admixture. Background technique [0002] With the development of the construction industry today, the demand for cement, as a building material with extensive application value, is increasing. At the same time, the requirements for the variety and quality of cement are also increasing. How to ensure or improve Under the conditions of cement strength and various physical properties, reducing the production and application costs of cement has become a hot topic. [0003] As we all know, adding certain admixtures to cement can improve the amount of mixed materials in cement and some other properties. In recent years, through a large number of scientific experiments, people have continuously improved cement admixtures and developed different properties. Cement admixture; the main defects of existing cement admixtures are: single function, poor comprehensi...

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Problems solved by technology

[0003] As we all know, adding certain admixtures to cement can improve the amount of mixed materials in cement and some other properties. In recent years, through a large number of scientific experiments, people have continuously improved cement admixtures and developed different properties. Cement admixture; the main defect of the existing cement admixture is: single function, poor comprehensive performance, in order to meet the needs of cement technology development, develop a kind of can not only improve the physical and chemical properties and construction performance of cement, but also ensure the quality of cement at the same time The admixtures to reduce the cost of cement production and increase the output of cement are the problems that need to be solved at present

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