Concrete for construction of extra-long concrete structures

Abstract

The invention relates to concrete used for construction of a super long concrete structure. The concrete is characterized by being prepared from, by mass, 302-304 parts of cement, 65-94 parts of mineral powder, 65-70 parts of fly ash, 665-705 parts of river sand, 1030-1045 parts of broken stone, 15.9-17.6 parts of CM-5 type compound antifreeze high-efficiency water reducing agent, 38-64 parts of HE-O type anti-crack water proofing agent and 170-173 parts of water. Post-pouring joints are avoided from being left in the building construction process of the super long concrete structure, the construction progress is accelerated, the construction period is shortened, no structural cracks exist, the overall stability of the structure is improved, and the waterproof quality of a project can be ensured.

Description

technical field [0001] The invention relates to the field of concrete, more specifically, it relates to a concrete used for super-long concrete structure construction. Background technique [0002] With the continuous acceleration of the urbanization process in our country, the urban population has begun to rise sharply. As a building form that can accommodate a considerable number of residents, high-rise buildings have become more and more popular. In the construction industry, super-long concrete is used as a construction process in construction projects. One of the main materials used in the building, its concrete components are the most important load-bearing components of the building structure. [0003] With the rapid development of my country's construction industry, super-long concrete structures have been widely used in construction engineering, and occupy an important position in modern engineering construction. In industrial and civil buildings, super-long concret...

AI Technical Summary

Problems solved by technology

According to the specification, after the shrinkage of the concrete on both sides of the post-cast belt is basically stable, it takes about 42 days before the post-cast belt can be backfilled with expansive concrete, which will obviously prolong the construction period.

Moreover, due to the time difference between post-pouring and concrete pouring, plastic shrinkage or dry shrinkage cracks often occur at the junction of new and old concrete.

The original intention of setting the post-casting belt is to prevent cracks in the structure, but due to various reasons, two through cracks are often artificially created at the post-casting belt, which may easily cause water leakage, cause corrosion of steel bars, and then affect the safety of the structure. It often becomes a hidden danger of leakage; in addition, the combination of post-cast concrete and pre-cast concrete is relatively weak, which will affect the integrity and safety of the structure

Images