Prefabrication method capable of preventing mass concrete components from cracking

A technology of mass concrete and concrete, which is applied in the field of prefabrication of mass concrete components, can solve problems such as difficult diffusion, cracks in mass concrete, and large volume, and achieve the effect of reducing the temperature difference between inside and outside and solving cracking

Inactive Publication Date: 2018-04-03
CCCC SHANGHAI DREDGING
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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 ac

Method used

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Embodiment Construction

[0021] Below in conjunction with embodiment the present invention is further described.

[0022] According to the reasons why mass concrete components are prone to quality problems such as temperature difference and cracks, the present invention performs temperature control and detection in the whole process of component prefabrication, and finally forms a kind of concrete that can prevent mass concrete by optimizing structure, optimizing raw materials, mixing ratio and pouring process The prefabrication process of component cracking, the specific steps are as follows:

[0023] (1) Modeling.

[0024] First, uniformly distributed vertical pressure relief holes are designed in the mass concrete component, and a temperature measuring element is placed in the center of the component, so that the temperature of the component can be monitored during the fabrication process. The diameter of the pressure relief hole is 425mm, the hole center spacing is 850mm, and the distance between...

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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, ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B40/00C04B40/02C04B40/04C04B111/24C04B111/34C04B111/74
CPCC04B28/04C04B2111/24C04B2111/343C04B2111/74C04B14/06C04B14/14C04B14/28C04B18/08C04B2103/302C04B40/0067C04B40/04C04B40/00C04B40/0277
Inventor 杨增海冯庆李晟陈旭嵇文远赵甲
Owner CCCC SHANGHAI DREDGING
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