Method for using waste erythritol mother liquor as concrete retarder

Abstract

The invention relates to a method for using a simply processed waste erythritol mother liquor as a concrete retarder. The waste erythritol mother liquor which is generated in the erythritol fermenting production process mainly comprises medium components of glucose, mannan, monopotassium phosphate, citric acid and the like, and metabolic compounds of erythritol, glycerol, ribitol, other trace polyols and the like, and the waste erythritol fermentiion mother liquor which undergoes preliminary processing of impurity removal, anticorrosion, homogenization and the like can be applied to the retardation of concrete. Domestic and foreign tests and practical applications prove that saccharides of glucose, mannan and the like, hydroxycarboxylic acids of citric acid and the like, and inorganic salts of monopotassium phosphate and the like have good retardation effects, and the waste erythritol mother liquor has a good retardation effect and a certain water reducing effect on the concrete. A certain amount of the waste erythritol mother liquor can be added to the concrete to reach a required retardation effect. Raw materials of the waste rythritol mother liquor, which are from industrial wastes, have the characteristics of low cost, use convenience and the like, and play a role in energy saving, emission reduction and value creation.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a retarder in concrete admixtures. [0002] Background technique [0003] With the development of economy and society, the performance requirements of concrete are continuously improved, and the application of concrete admixtures is becoming more and more extensive. Retarders have the functions of delaying the setting time, reducing water consumption, and improving workability. The use of retarders can increase the available time in engineering construction and reduce the difficulties caused by the setting time limit to various engineering constructions. It has been widely used in large-capacity concrete, large-scale pouring of concrete, long-term parking or long-distance transportation of concrete. , pavement construction concrete and other concrete that need to delay the setting time. [0004] At present, there are two main types of concrete retarders used at h...

AI Technical Summary

Problems solved by technology

Inorganic retarders such as phosphate and metaphosphate, but the stability of their retarding effect is not good, so they are not often used alone

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