Marine engineering concrete with abrasion resistance and chlorine salt corrosion resistance

A technology of anti-abrasion and concrete, which is applied in the field of building materials, can solve the problems of lack of anti-chloride ion permeability and collaborative design of anti-abrasion performance, and achieve excellent anti-abrasion performance and anti-chloride ion penetration performance, preparation process Simple and convenient, simple source effect

Inactive Publication Date: 2020-02-11
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, marine concrete is usually designed for its chloride ion permeability resistance, sulfate erosion resistance, impermeability, etc., and there is a lack of collaborative design for chloride ion permeability resistance and abrasion resistance; further exploration Concrete with anti-scouring and anti-chlorine salt erosion has important research and application significance

Method used

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  • Marine engineering concrete with abrasion resistance and chlorine salt corrosion resistance

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Comparison scheme
Effect test

Embodiment 1

[0029] A marine anti-abrasion and chlorine-salt corrosion-resistant concrete, and its preparation method includes the following steps:

[0030] 1) Weigh the raw materials according to the ratio, and the raw materials and their dosage are: P.O42.5 cement 240kg / m 3 , Superfine mineral powder 100kg / m 3 , Ceramic powder 60kg / m 3 , Granite gravel 1150kg / m 3 , River sand 740kg / m 3 , Polycarboxylic acid superplasticizer 10kg / m 3 , Water 132kg / m 3 ;

[0031] 2) After the weighed P.O42.5 cement, superfine mineral powder, ceramic powder, granite crushed stone and river sand are mixed evenly, add polycarboxylic acid superplasticizer and water, and stir fully to obtain the Marine engineering anti-abrasion and chlorine salt corrosion resistant concrete.

Embodiment 2

[0033] A marine anti-abrasion and chlorine-salt corrosion-resistant concrete, and its preparation method includes the following steps:

[0034] 1) Weigh the raw materials according to the proportion, and the raw materials and their dosage are: P.O42.5 cement 210kg / m 3 , Superfine mineral powder 110kg / m 3 , Ceramic powder 70kg / m 3 , Granite gravel 1150kg / m 3 , River sand 785kg / m 3 , Polycarboxylic acid superplasticizer 11kg / m 3 , Water 124kg / m 3 ;

[0035] 2) After the weighed P.O42.5 cement, superfine mineral powder, ceramic powder, granite crushed stone and river sand are mixed evenly, add polycarboxylic acid superplasticizer and water, and stir fully to obtain the Marine engineering anti-abrasion and chlorine salt corrosion resistant concrete.

Embodiment 3

[0037] A marine anti-abrasion and chlorine-salt corrosion-resistant concrete, and its preparation method includes the following steps:

[0038] 1) Weigh the raw materials according to the ratio, and the raw materials and their dosage are: P.II 42.5 cement 200kg / m 3 , Superfine mineral powder 120kg / m 3 , Ceramic powder 70kg / m 3 , Basalt gravel 1180kg / m 3 , River sand 770kg / m 3 , Polycarboxylic acid superplasticizer 10kg / m 3 , Water 125kg / m 3 ;

[0039] 2) After the weighed P.II 42.5 cement, ultra-fine mineral powder, ceramic powder, basalt crushed stone, and river sand are mixed evenly, add polycarboxylic acid superplasticizer and water, and stir thoroughly to obtain the sea The concrete is resistant to erosion and corrosion by chlorine salt.

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Abstract

The invention discloses a marine engineering concrete with and abrasion resistance and chlorine salt corrosion resistance. The marine engineering concrete is prepared from cement, ceramic powder, superfine mineral powder, gravels, river sand, a polycarboxylate superplasticizer and water in proportion. The gravels such as granite with excellent abrasion resistance are selected, and the aggregate content of the gravels is maximized, so the abrasion resistance of the concrete is effectively improved; the ceramic powder is used as an admixture, so that the abrasion resistance of a cement paste isimproved, chloride ions are adsorbed by using calcium aluminate hydrate generated by a secondary hydration reaction in the later period of the cement paste to prevent the chloride ions from being transmitted inwards, and corrosion of reinforcing steel bars is reduced; and the superfine mineral powder is adopted as an admixture, so that the paste-aggregate interface bonding force is improved, the porosity of the paste is reduced, the abrasion resistance of the concrete is improved, and erosion ions are prevented from being transmitted inwards to reduce corrosion of steel bars. The prepared marine engineering concrete with and abrasion resistance and chlorine salt corrosion resistance has the advantages of high sand-carrying surge erosion resistance, high chloride ion erosion resistance andgreat engineering application values.

Description

Technical field [0001] The invention belongs to the field of building materials, and in particular relates to a marine anti-abrasion and chlorine salt corrosion-resistant concrete and a preparation method thereof. Background technique [0002] The bridge piers in the marine environment will suffer from the erosion of chloride salt for a long time, but will also be eroded by sand-laden surges. Under the action of erosion and abrasion of the sand-laden surge, the concrete protective layer of the bridge pier will have thinning of the thickness of the reinforced concrete protective layer and surface damage, thereby shortening the path of chloride ion penetration into the structure and accelerating the corrosion of steel. At the same time, the cracking of the concrete protective layer caused by the corrosion of steel bars will further aggravate the corrosion and erosion of chloride salts, which will affect the normal use and safe operation of the bridge. Therefore, when designing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/24
CPCC04B28/04C04B2111/20C04B2111/24C04B2201/50C04B18/023C04B14/02C04B14/06C04B14/048C04B14/14C04B2103/302
Inventor 陈晓润王军赵日煦张恒春黄汉洋刘凯
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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