super retarded concrete

Abstract

The invention relates to super-retarded concrete, which is characterized by comprising the following raw materials (by weight): 320-330 parts of cement, 60-70 parts of mineral powder, 40-50 parts of fly ash, 710-730 parts of sand, 1050-1100 parts of broken stone, 165-175 parts of water and 8.1-9 parts of an additive. The super-retarded concrete has long setting time and enough later strength.

Description

technical field [0001] The invention relates to the field of building materials, more specifically, it relates to a super retarded concrete. Background technique [0002] The setting time of concrete is an important index of concrete workability, which directly affects the operational time of concrete, the arrangement and construction period of construction procedures, and also affects other workability indicators, concrete hardening performance and performance after hardening. [0003] On the one hand, ultra-retarded concrete requires that the concrete has a long setting time in the early stage, and on the other hand, the concrete must have sufficient late strength to meet the design requirements. This is the difficulty in the development of ultra-retarded concrete. Under the same external environment, the setting time of concrete depends on the selection and dosage of raw materials. It mainly involves the type and strength grade of cement, the amount of fly ash, the part...

AI Technical Summary

Problems solved by technology

Adding admixtures is the main means of preparing ultra-retarded concrete, but not the only means

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