Production method of high crack resistance concrete

A production method and concrete technology, applied in the field of comparison, can solve the problems of concrete structure damage, affecting the appearance of the structure, weakening the durability of the concrete structure, etc., and achieving the effect of not easy to break and high crack resistance.

Inactive Publication Date: 2016-01-20
CCCC FOURTH HARBOR ENG INST
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Problems solved by technology

The appearance of harmful cracks will not only affect the appearance of the structure, but also greatly accelerate the rate at which harmful substances erode the concrete, which will lead to faster damage to the concrete structure and weaken the overall durability of the concrete structure

Method used

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  • Production method of high crack resistance concrete

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Embodiment 1

[0029] see figure 1 Shown, high anti-cracking concrete production method of the present invention, described production method comprises the following steps:

[0030] 1. Detect and screen out concrete raw materials that meet the range of crack resistance and durability indicators: use the methods specified in the standard specifications to test the performance of various raw materials that make up the concrete. In addition to meeting the index requirements specified in the specifications for concrete raw materials, special Specifications for concrete raw materials with high crack resistance and durability.

[0031] The concrete raw materials include cement, fly ash, ground slag powder, water, sand, gravel and water reducer; the indicators of the concrete raw materials that meet the crack resistance and durability indicators include:

[0032] Cement clinker: C3A content ≤ 8%, alkali content ≤ 0.6%, cement specific surface area 300 ~ 350m 2 / kg;

[0033] Fly ash: Class II or ...

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Abstract

The invention relates to a production method for high-crack-resistance concrete, and especially the production method comprises: screening concrete raw materials, testing gelling material system hydration heat, testing gelling material system restriction crack, testing concrete temperature stress, optically selecting a high-crack-resistance concrete mix ratio through primary design on the concrete mix ratio, and producing the high-crack-resistance concrete according to the concrete mix ratio. The production method comprises: screening the concrete raw materials, testing the gelling material system hydration heat, testing the gelling material system restriction crack, testing the concrete temperature stress, optically selecting the best high-crack-resistance concrete mix ratio, and producing the high-crack-resistance concrete according to the concrete mix ratio. According to the production method, the best high-crack-resistance concrete mix ratio is optically selected, and the produced concrete has relatively high crack resistance, is not easy to crack and deform, and has safety and quality guarantees.

Description

technical field [0001] The invention relates to a production method of high-crack-resistant concrete, in particular to a method for selecting concrete raw materials, testing the heat of hydration of the cementitious material system, testing the constrained cracking of the cementitious material system, testing the temperature and stress of concrete, and optimizing the concrete mix ratio preliminary design. The concrete mix ratio with the best crack resistance performance, and the method of producing high crack resistance concrete according to the concrete mix ratio. Background technique [0002] At present, the number of submarine concrete tunnels in the world is increasing year by year, and the scale is expanding year by year, and the difficulty of prefabricated concrete tunnels is gradually increasing. Concrete tunnel structures are affected by factors such as large cross-section, large volume, structural form, and complex construction techniques, and are prone to hazardous...

Claims

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Application Information

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IPC IPC(8): C04B28/00
Inventor 张宝兰王迎飞刘行李超熊建波范志宏李士伟许小华何雨倩李建业刘家润
Owner CCCC FOURTH HARBOR ENG INST
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