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A c50 grade marine high performance concrete

A high-performance concrete and marine technology, applied in the field of concrete, can solve the problems of poor resistance to seawater erosion and low service life, and achieve the effects of improving durability, improving material composition, and reducing porosity

Active Publication Date: 2022-06-17
北部湾海洋新材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the disadvantages of poor seawater erosion resistance and low service life of high-performance concrete in the prior art, and studies seawater characteristics, climatic conditions and design service life requirements of general sea-crossing bridges, and comprehensively studies the impact of marine environment and climate on concrete life. Influencing factors, providing a C50 grade marine high-performance concrete, through optimizing the selection of concrete raw materials, improving the composition of the concrete mix and adding anti-corrosion, anti-rust and anti-seepage agents, to improve the chloride ion permeability resistance of marine high-performance concrete Anti-sulfate erosion ability, improve the volume stability of concrete and the ability of concrete to resist erosion and biological erosion, and greatly improve the service life guarantee ability of concrete

Method used

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  • A c50 grade marine high performance concrete
  • A c50 grade marine high performance concrete
  • A c50 grade marine high performance concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A C50 grade marine high performance concrete:

[0041] Table 1: Mix ratio unit of C50 grade marine high performance concrete: kg / m 3

[0042]

[0043] According to the above mixing ratio, the cement is 52.5 grade P·O ordinary Portland cement;

[0044] The fly ash is F class II grade fly ash, the slag powder is S95 grade granulated blast furnace slag powder, and the calcined kaolin is calcined secondary kaolin used in the rubber industry;

[0045] The fine aggregate is river sand, the fineness modulus of the fine aggregate is 2.8, the mud content is 0.9%, and the mud block content is 0.2%;

[0046] The coarse aggregate is 5-25mm continuous gradation, its crushing index is 9%, the content of needle-like particles is 4.5%, the content of mud is 0.2%, and the content of mud block is 0%;

[0047] The water-reducing agent is a retarded polycarboxylic acid-based high-performance water-reducing agent;

[0048] Described rust inhibitor is infiltration type containing amin...

Embodiment 2

[0054] A C50 grade marine high performance concrete:

[0055] Table 2: Mix ratio unit of C50 grade marine high performance concrete: kg / m 3

[0056]

[0057] According to the above mixing ratio, the cement is 52.5 grade P·O ordinary Portland cement;

[0058] The fly ash is Class I fly ash, the slag powder is S105 grade granulated blast furnace slag powder, and the calcined kaolin is calcined first-grade kaolin for rubber industry;

[0059] The fine aggregate is river sand, the fineness modulus of the fine aggregate is 2.7, the mud content is 1.1%, and the mud block content is 0.2%;

[0060] The coarse aggregate is 5-25mm continuous gradation, its crushing index is 10%, the content of needle-like particles is 3.9%, the content of mud is 0.2%, and the content of mud block is 0.1%;

[0061] The water-reducing agent is a retarded polycarboxylic acid-based high-performance water-reducing agent;

[0062] Described rust inhibitor is infiltration type containing amino alcohol r...

Embodiment 3

[0068] A C50 grade marine high performance concrete:

[0069] Table 3: Mix ratio unit of C50 marine high performance concrete: kg / m 3

[0070]

[0071] According to the above mixing ratio, the cement is 52.5 grade P·O ordinary Portland cement;

[0072] The fly ash is F class II grade fly ash, the slag powder is S95 grade granulated blast furnace slag powder, and the calcined kaolin is calcined secondary kaolin used in the rubber industry;

[0073] The fine aggregate is river sand, the fineness modulus of the fine aggregate is 2.9, the mud content is 1.4%, and the mud block content is 0.5%;

[0074] The coarse aggregate is 5-25mm continuous gradation, its crushing index is 9%, the content of needle-like particles is 4.5%, the content of mud is 0.4%, and the content of mud block is 0.2%;

[0075] The water-reducing agent is a retarded polycarboxylic acid-based high-performance water-reducing agent;

[0076] Described rust inhibitor is infiltration type containing amino al...

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Abstract

The invention discloses a C50 grade marine high-performance concrete, which is made of the following components: cement: 330-340kg / m 3 , Fly ash: 30‑40kg / m 3 , Mineral powder: 60-70kg / m 3 , Calcined kaolin: 30‑40kg / m 3 , Fine aggregate: 750‑800kg / m 3 , Coarse aggregate: 1050‑1100kg / m 3 , Water reducing agent: 8‑10kg / m 3 , Rust inhibitor: 8‑9kg / m 3 , Water: 150-160kg / m 3 , Acetylated distarch phosphate: 0.4‑0.6kg / m 3 , Trisodium monohydrogen pyrophosphate: 0.4‑0.6kg / m 3 . By optimizing the selection of concrete raw materials, improving the composition of concrete and adding anti-corrosion, anti-rust and anti-seepage agents, the anti-chloride ion permeability and anti-sulfate erosion of marine high-performance concrete can be improved, and the volume stability of concrete and the concrete volume stability can be improved. The ability to resist erosion and biological erosion can greatly improve the service life guarantee ability of concrete.

Description

【Technical field】 [0001] The invention relates to the technical field of concrete, in particular to a C50 grade marine high-performance concrete. 【Background technique】 [0002] With the development of modern science and technology and production, various ultra-long, ultra-high and ultra-large concrete structures, as well as high-rise buildings, sea-crossing bridges, submarine tunnels, offshore oil production platforms, nuclear reactors, toxic The need for construction of hazardous waste disposal projects, etc. is increasing. The construction of these concrete projects is difficult, the use environment is harsh, and the maintenance is difficult. Therefore, the concrete is required not only to have good construction performance, but also to try not to produce defects during pouring, but also to have good durability and long service life. [0003] Reinforced concrete is an important material and component for building bridge structures, and concrete structural defects are oft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/24C04B111/26C04B24/38C04B22/16C04B24/12C04B18/08C04B18/14C04B14/10
CPCC04B28/04C04B2111/26C04B2111/24C04B2111/2015C04B18/08C04B18/141C04B14/106C04B14/068C04B2103/302C04B24/122C04B24/243C04B22/16Y02W30/91
Inventor 包泳先张芳许旺发卻林王基成
Owner 北部湾海洋新材料研究院
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