A method for early strength, anti-cracking and anti-freezing of concrete floor slabs in winter construction

Abstract

The invention belongs to the technical field of concrete construction, and particularly relates to a method for early strength, crack control and antifreezing of a concrete floor during winter construction. The method comprises the steps that after a concrete mixture is subjected to floor pouring, bricks or other materials are laid around the floor for blocking, curing water is prepared in a container and is formed by adding early strength components or early strength components and antifreezing components into tap water, the curing water keeps immersing the floor, and curing is carried out for at least seven days. According to the method, the adding manner of an early strength agent is changed, the early concrete strength under the low temperature condition is improved, and no bad influence is generated on the later strength and other physical and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of concrete construction, and in particular relates to a method for early strength cracking and freezing prevention of concrete floor slabs in winter construction. Background technique [0002] For the floor pouring of reinforced concrete buildings, especially in the winter when the temperature is low, the strength of the floor concrete increases slowly. Due to various reasons, the cracking of the concrete floor is more prominent, which is a major problem in construction. In order to improve the early stage of concrete Strength, usually by adding accelerators to concrete, but after adding accelerators, the slump loss of concrete is faster. If the transportation distance is long and some unforeseen factors are added, stagnation often occurs. If the time is too long, some stay for as long as four or five hours or even longer. In this case, because the concrete slump is too small, inappropriate methods such as...

AI Technical Summary

Problems solved by technology

[0002] For the floor pouring of reinforced concrete buildings, especially in the winter when the temperature is low, the strength of the floor concrete increases slowly. Due to various reasons, the cracking of the concrete floor is more prominent, which is a major problem in construction. In order to improve the early stage of concrete Strength, usually by adding accelerators to concrete, but after adding accelerators, the slump loss of concrete is faster. If the transportation distance is long and some unforeseen factors are added, stagnation often occurs. If the time is too long, some stay for as long as four, five hours or even longer

In this case, due to the small slump of concrete, inappropriate methods such as adding water are often used to increase the slump of concrete, which has a very adverse effect on the construction quality of concrete.

[0003] Adding early strength agents (commonly used are sodium sulfate, triethanolamine, etc.) , these factors will lead to cracking of floor concrete