Anti-cracking concrete for inverted siphon construction

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 ...

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.