Concrete admixture, preparation method thereof and concrete targeted regulation and control method

Abstract

The invention is suitable for the technical field of concrete, and provides a concrete admixture, a preparation method and application thereof, and concrete. The concrete admixture comprises a slump retaining admixture and a water reducing admixture; wherein the slump retaining admixture comprises, by weight, 0.05%-2% of sodium gluconate, 1%-5% of a water reducing agent, 20%-30% of a slump retaining agent, 0.01%-0.05% of an air entraining agent, and 0.03%-0.08% of a defoaming agent, with the balance being water; the water reducing admixture comprises, by weight, 0.05%-2% of sodium gluconate, 17%-27% of a water reducing agent, 1%-5% of a slump retaining agent, 0.01%-0.05% of an air entraining agent, and 0.03%-0.08% of a defoaming agent, with the balance being water. The concrete admixture provided by the invention can be subjected to double-doping or multi-doping targeted adjustment, so that the quality of concrete can be accurately controlled.

Description

technical field [0001] The invention belongs to the technical application of concrete, and in particular relates to a concrete admixture, a preparation method thereof, and a concrete targeting control method. Background technique [0002] Concrete admixture, usually refers to the admixture with polycarboxylic acid molecule as the main component, which is added during the concrete mixing process to improve the performance of concrete, and the dosage is generally not more than 5% of the cement mass. Concrete admixtures are the foundation of modern high-strength, high-performance, high-durability concrete, and the soul of modern concrete. Concrete admixtures are divided into four categories according to their main functions: A. Admixtures for improving the rheological properties of concrete mixtures. B. An admixture to adjust the setting time and hardening performance of concrete. Including retarder, early strength agent. C. Admixtures to improve the durability of concrete. ...

AI Technical Summary

Problems solved by technology

At present, since concrete companies use fixed admixtures such as water-reducing components, slump-preserving components, retarding components, and early-strength antifreeze components, when various factors of concrete are changing, it can only be adjusted by adjusting the admixtures. The ratio of the admixture’s slump-retaining component, water-reducing component, retarding component, etc. cannot be changed from time to time, so the admixture and concrete components cannot be accurately matched from time to time, and the admixture can only be adjusted. The total dosage leads to uncontrollable construction performance at the factory, large fluctuations in workability on site, high manufacturing cost, low strength, and deviation in durability

Therefore, the current concrete admixture is seriously mismatched with the concrete components that change from time to time, which brings great inconvenience to the actual work and is seriously unscientific.

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