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Mass concrete cracking proof construction technology

A large-volume concrete and construction technology, which is applied in the direction of infrastructure engineering, construction, etc., can solve problems such as surface cracks and expansion cracks, and achieve the effects of reducing water consumption, reducing internal and external temperature differences, and ensuring quality

Active Publication Date: 2015-01-07
SEPCO ELECTRIC POWER CONSTR CORP
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AI Technical Summary

Problems solved by technology

[0015] Disadvantages of mass concrete construction: surface cracks and expansion cracks are prone to occur during the heating and cooling stages, and these cracks are divided into penetrating cracks, deep cracks and surface cracks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] Construction of Massive Concrete on the Foundation Floor of Turbine Generator

[0066] The bottom plate of the turbogenerator foundation is in the shape of a cuboid, with dimensions: length x width x thickness = 34.6m x 12.8m x 2.5m, the bottom elevation is -6.0m, the top elevation is -3.50m, and the plate thickness is 2.5m; the bottom plate is The overall cast-in-place reinforced concrete structure, the concrete strength grade is C30 (impermeability grade is S6); the concrete volume is about 1111m 3 .

[0067] During the construction process, proceed as follows:

[0068] 1. According to the large-volume concrete design and construction drawings, set up the steel skeleton; build the formwork around the steel skeleton according to the construction drawings; the formwork encloses the concrete pouring area of ​​length × width × thickness = 34.6m × 12.8m × 2.5m.

[0069] 2. According to the technical requirements of mass concrete, select the raw materials and mix ratio of...

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Abstract

The invention discloses a mass concrete cracking proof construction technology which can prevent the concrete from cracking and improve the concrete pouring quality. The mass concrete cracking proof construction technology comprises the following steps of firstly building a steel reinforcement framework and a template, then selecting the type and the ratio of the concrete, pouring the concrete, regulating the internal and external temperature difference and the maximum temperature of the concrete after concrete pouring is achieved; cooling the concrete by water-passing cooling, when the internal and external temperature difference of the concrete cannot be smaller than 25 DEG C by the water-passing cooling, reducing the internal and external temperature difference of the concrete by rising the temperature of the exterior of the concrete and maintaining naturally concrete temperature reducing when the internal and external temperature difference is smaller than 25 DEG C and the internal maximum temperature is smaller than 50 DEG C; removing the template when the concrete temperature is not changed to achieve construction of the concrete. According to the mass concrete cracking proof construction technology, cracking during a solidification process of the concrete is effectively avoided and the concrete quality is improved.

Description

technical field [0001] The invention relates to a concrete construction technology, in particular to a large-volume concrete anti-crack construction technology. Background technique [0002] Known: With the progress of society and the development of science and technology, mass concrete construction is becoming more and more common in the engineering construction process, the construction technology requirements are relatively high, and the construction difficulty increases. Especially in the construction, it is necessary to prevent concrete from hydrating heat The temperature difference produces temperature stress cracks. Therefore, we need to work hard to improve construction technology and quality to ensure the engineering safety and construction quality of mass concrete projects. We need to make sufficient preparations in terms of material selection, technical measures and other related links to ensure the construction of mass concrete. Especially the control of the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/02
CPCE02D15/02E02D2250/0007E02D2250/0023
Inventor 魏小彤王智王华荣陈勇赖志勇罗茂双
Owner SEPCO ELECTRIC POWER CONSTR CORP
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