Prefabrication method capable of preventing mass concrete components from cracking

Abstract

A prefabrication method capable of preventing mass concrete components from cracking comprises steps as follows: modeling, concrete configuration, pouring, curing and form stripping. The temperature difference between inside and outside of mass concrete is effectively reduced while design strength requirements of a prefabricated component are met through optimization of structure sizes, selectionof high-quality cement, reasonable use of a mineral additive and reasonably graded aggregate, initially set matching rate calculation and test of the concrete as well as measures including concrete temperature stress, heat insulation temperature rise checking calculation and the like, so that the problem of cracking of prefabricated mass concrete components is solved.

Description

technical field [0001] The invention relates to a prefabrication method for large-volume concrete components, in particular to a prefabrication method for preventing large-volume concrete components from cracking. Background technique [0002] The definition of mass concrete is that the minimum geometric dimension of the concrete structural entity is not less than 1m, or the concrete is expected to cause harmful cracks due to temperature changes and shrinkage caused by cement hydration in the concrete. The application of mass concrete emerges at the historic moment with the modernization of society, and with the rapid development of the world economy, it is more and more widely used. In the early 1980s, mass concrete technology began to be popularized and applied in my country, and was quickly widely used in high-rise buildings, subways, bridges and marine engineering. Due to the large volume and complex structure of mass concrete, and concrete is a poor conductor of heat, ...

AI Technical Summary

Problems solved by technology

Due to the large volume and complex structure of mass concrete, and the fact that concrete is a poor conductor of heat, the traditional prefabrication process of mass concrete components tends to cause the heat of cement hydration to accumulate inside the structure and is difficult to diffuse. The temperature deformation is constrained to generate temperature stress, which will cause cracks in the mass concrete and affect the integrity and durability of the component