High-early-strength concrete mixture and winter construction method thereof

Abstract

The invention discloses a high-early-strength concrete mixture and a winter construction method thereof, and belongs to the field of building materials. The high-early-strength concrete mixture is prepared by mixing and evenly stirring the following components in parts by weight: 193-256 parts of cement, 335-456 parts of sand, 784-885 parts of broken stone, 48-79 parts of fly ash, 69-105 parts ofmineral powder, 5-10 parts of a water reducer, 0.05-0.5 part of a compound early-strength agent, 0.3-0.6 part of a defoamer, 7-10 parts of a compound expanding agent and 124-198 parts of water. The high-early-strength concrete mixture has the advantages that the initial setting time and the final setting time of concrete are shortened, the early strength of concrete is improved, and the use efficiency of a template is accelerated.

Description

technical field [0001] The invention relates to the field of building materials, more specifically, it relates to a high-early-strength concrete mixture and its winter construction method. Background technique [0002] Concrete, referred to as concrete, is a collective name for engineering composite materials that are aggregated into a whole by cementitious materials. It uses cement as cementitious material, sand and stone as aggregates, and can be mixed with water and admixtures in a certain proportion. It is obtained by mixing and is widely used in civil engineering. [0003] In recent years, with the continuous and rapid development of my country's economy, the intensity and scale of my country's infrastructure construction have also continued to increase, and the application of concrete components has also increased. In the production of concrete components, in order to stretch the steel bars as soon as possible, speed up the turnover of the formwork and the utilization...

AI Technical Summary

Problems solved by technology

Chloride admixtures, such as sodium chloride and calcium chloride, can improve the early strength of cement, but the presence of chloride ions will corrode steel bars and cause concrete cracking; sulfate admixtures, such as sodium sulfate, can increase The early strength of cement, but too much mixing will cause the concrete to swell and crack in the later stage; organic amine admixtures, such as triethanolamine, must be mixed with other admixtures (sodium chloride, calcium chloride and sulfate), otherwise The effect of early strength is not obvious, and no matter which of the above substances will make the later strength of concrete insufficient, reduce durability and increase concrete production costs

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