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Anti-cracking concrete for inverted siphon construction

A concrete and inverted siphon technology, applied in the field of concrete materials, can solve the problems of poor crack resistance, cracked, difficult to repair, etc.

Inactive Publication Date: 2007-10-31
HEBEI RES INST OF INVESTIGATION & DESIGN OF WATER CONSERVANCY & HYDROPOWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing reinforced concrete inverted siphons at home and abroad have the disadvantages of poor crack resistance and difficult repair after cracks appear. Some reinforced concrete pipes are in a long-term working state with cracks.

Method used

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Embodiment Construction

[0008] The mixing ratio of the anti-crack concrete for inverted siphon construction provided by the present invention will be further described below.

[0009] Optimize the concrete mix ratio through tests and simulation calculations, adopt a reasonable water-binder ratio, increase water reducers, air-entraining agents, sand ratios, and high fly ash, etc., reduce cement consumption, and reduce hydration heat temperature rise. Reasonably select concrete raw materials, optimize concrete mix ratio, and take quality assurance measures in the process of concrete mixing, transportation, and pouring to prevent cracks. The quality and mix ratio of concrete raw materials determine the thermal and mechanical properties of concrete. It prevents cracks from two aspects: reducing the adiabatic temperature rise of concrete and improving the crack resistance. Including the selection of cement with low heat release, reducing the amount of cement to reduce the adiabatic temperature rise of con...

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PUM

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Abstract

The invention discloses a concrete material for inverted siphon construction in hydraulic engineering technique domain, which comprises the following steps: allocating ((kg / m3) 220-240kg cement, 55-60kg coal ash, 135-150kg water, 640-645kg sand with sand percentage at 33%, 655-660kg small stone with diameter at 5-20mm and 670-675kg middle stone with diameter at 20-40mm; choosing 0. 7% dehydragent and tenthousandth 0. 4 air-entrainer; getting the product. This invention provides concrete fitting ratio, which can prepare inverted siphon with good prevented cracking quality.

Description

Technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a concrete material for inverted siphon construction. Background technique [0002] The reinforced concrete inverted siphon has the advantages of convenient construction, low cost, and does not affect the flood discharge of the river. It has the characteristics of strong durability, convenient construction, small deformation, and small change in roughness. It is still widely used at home and abroad. However, reinforced concrete inverted siphons have poor crack resistance and are not easy to repair after cracks appear. No matter whether there are any cracks on the inverted siphon concrete pipe, longitudinal or horizontal, surface or through, wide cracks or micro cracks, it will affect The key to quality, but also engineering is not allowed. In order to prevent cracks, in the design of the inverted siphon, it is necessary to (1) reasonably select ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/14C04B18/08C04B14/06C04B103/30
CPCY02W30/91
Inventor 顾辉高海成牛桂林王学广谢子书陈增峰景书达李春英王志刚郝坤赵彦波于良碧刘迪安崔福占张喜忠
Owner HEBEI RES INST OF INVESTIGATION & DESIGN OF WATER CONSERVANCY & HYDROPOWER
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