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Underwater non-dispersible high-performance concrete

A high-performance concrete and high-performance technology, applied in the field of concrete, to achieve superior durability, good durability, and high strength

Inactive Publication Date: 2016-11-09
CCCC FIRST HARBOR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the excellent mechanical properties and durability of underwater concrete in my country at present.

Method used

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Embodiment Construction

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. One aspect of the embodiments of the present invention provides a kind of underwater non-dispersible high-performance concrete, and the composition ratio is as follows:

[0019]

[0020] In the above-mentioned embodiments provided by the present invention, the ordinary Portland cement with a strength grade of 52.5 is selected for concrete; -20mm (2 grades) continuously graded gravel, the aggregate gradation is adjusted according to the bulk density to ensure good compactness of the concrete; the traditional flocculant is used, and the dosage is 2.5% of the cementitious material; Water agent, the dosage is 1.0% of the amount of gelling material, and the water reducing rate is greater than 25%.

[0021] According to the JTS202-2-2011 "Quality Control Standard for Water Transport Engineering Concrete" and "Quality Control Standard for High Performance Conc...

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Abstract

The invention provides underwater non-dispersible high-performance concrete, and belongs to the technical field of concrete. The underwater non-dispersive high-performance concrete meets both the underwater non-dispersive performance requirement and the chloride penetration resistance requirement, and has high strength. The underwater non-dispersive high-performance concrete is prepared from 650 kg / m<3> of cementing materials, 625 kg / m<3> of sand, 725 kg / m<3> of broken stone, 16.25 kg / m<3> of flocculating agent, 6.5 kg / m<3> of high-performance water reducing agent and 240 kg / m<3> of water. The cementing materials are prepared from cement and mineral powder in the proportion of 4:1. The underwater non-dispersible high-performance concrete can be applied to underwater concrete structures.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to an underwater non-dispersible high-performance concrete. Background technique [0002] Since the Underwater Non-Dispersible Concrete (NDC) technology was introduced into my country in the 1980s, its application technology has been continuously developed and improved. Underwater non-dispersible concrete, also known as underwater pouring concrete, is a special concrete that can be poured underwater and will not separate aggregates and cement slurry under the action of water like ordinary concrete. At present, it is mainly used in the construction of underwater large-volume concrete in the fields of water conservancy, ocean, petrochemical, coal and other engineering fields, and its application range covers many provinces and cities across the country. Such as: Qinshan Nuclear Power Plant Phase III water intake project (pumping), Shanghai 600-ton gantry crane load-bearing platform ...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/12C04B14/06C04B14/02C04B2103/0068C04B2103/302C04B22/002
Inventor 王庆海马燕峰祝善鹏冯海暴
Owner CCCC FIRST HARBOR ENG
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