Preparation technology of high-efficiency set retarder

Abstract

The invention discloses a manufacturing process of a high-efficiency retarder, which comprises the following steps: 1) weighing an organosilicon modified acrylic emulsion, a film-forming agent, a water reducing agent and polyethylene glycol in parts by weight, and mixing them uniformly; 2) placing them in water Add amantadine ethylamine, phosphorous acid, sodium glucoheptonate, stir and heat to 60-80 ℃, and add formaldehyde solution dropwise; 3) after dissolving white sugar, add citric acid, tartaric acid, borax, maltodextrin, stir and mix. 4) Mix the slurry prepared in steps 1), 2), and 3) together, stir, and mix to obtain a retarder. The retarder of the invention has good retardation effect, stable chemical properties when applied to cement slurry, easy adjustment of thickening time, can avoid premature coagulation of cement, reduce the loss rate of cement strength, and has good Regularity and operability, low cost and simple operation.

Description

technical field [0001] The invention relates to a production process of a retarder, in particular to a production process of a high-efficiency retarder. Background technique [0002] Concrete is an essential engineering material in modern construction engineering. The construction quality of concrete mixing, transportation, pouring, maintenance and other links directly affects the quality of the project and the safety of use. Concrete retarder is a concrete admixture that can prolong the setting time of concrete. Concrete retarder is mainly used to prolong the hydration and hardening time of cement, so that the freshly prepared concrete can maintain a certain degree of plasticity for a long time. With the advancement of concrete engineering construction technology, the application of retarders and retarder superplasticizers is increasing. However, the existing temperature-resistant retarders have poor temperature resistance, high sensitivity to temperature, and slow develop...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing inorganic and organic retarders have certain deficiencies and shortcomings. They cannot play the role of prolonging the setting time of cement well, have poor temperature resistance, and are sensitive to temperature. Strong resistance, slow development of top strength, the purpose is to provide a high-efficiency retarder production process, with good retarding effect, stable chemical properties when applied to cement paste, easy to adjust thickening time, good regularity and operability High reliability, simple operation, improve production efficiency and reduce construction cost