Concrete mixture for large volume concrete construction in autumn period and construction method of poured walls thereof

Abstract

The invention relates to a concrete mixture for large volume concrete construction in autumn period and a construction method of poured walls thereof. The concrete mixture comprises the following raw materials in parts by weight: 182-218 parts of cement, 775 parts of medium sand, 1048 parts of cobblestones, 170 parts of water, 145-181 parts of a mineral admixture, and 7.8 parts of an additive. The mineral admixture comprises coal ash and slag powder, the usage amount of the coal ash is 39-40% of the usage amount of a gelling material, the gelling material comprises cement and the mineral admixture, the additive comprises a water reducer, a water-proofing agent, and an expanding agent, and the mass ratio of the water reducer to the water-proofing agent to the expanding agent is 5:2:3. The construction method comprises the following steps: preparation before construction, weighing of raw materials, stirring of raw materials, pouring, vibrating and maintenance. Under the prerequisite that concrete strength is guaranteed, double mixing technology is employed, in order to reduce the usage amount of the total gelling material, reduce the absolute usage amount of cement, and improve the usage amount of the admixture; the usage amount of the coal ash in the admixture is improved, in order to reduce hydration heat and adiabatic temperature rise of the concrete, and reduce cracking risk of the concrete.

Description

technical field [0001] The invention relates to the technical field of concrete building construction, more specifically, it relates to a concrete mixture used for mass concrete construction in autumn and a construction method for pouring a wall thereof. 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 favored by developers. In the construction industry, super-long concrete is used as a construction project. One of the main materials used in the process, its concrete members 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 enginee...

AI Technical Summary

Problems solved by technology

[0004] In particular, when concrete is poured in autumn, the atmospheric temperature is relatively high, and the temperature difference between day and night is large. At the same time, because the structure is a super-large-volume structure, if effective countermeasures are not taken, concrete cracks caused by temperature and shrinkage are likely to occur, or continuous pouring Failure to cause construction cold joints in time

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