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Sulfate-resistant concrete

A sulfate-resistant concrete technology, applied in the field of sulfate-resistant concrete and anti-corrosion concrete, can solve the problems of reducing the service life of concrete, easily destroying the concrete structure, and failing to achieve technical effects, etc., to prolong the service life, increase durability, and resist The attack effect of sulfate ion

Active Publication Date: 2015-06-03
CHINA SHANXI SIJIAN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the problem that the corrosive medium is a liquid medium and the sulfate ion severely corrodes the environment, it is easy to damage the concrete structure and reduce the service life of the concrete. However, the dosage of the existing composite concrete preservative is 4% of the cementitious material, and the ratio is too high. Low, it is difficult to achieve the anti-corrosion effect, or there are many types of concrete in actual use. In the case of poor control of anti-corrosion agents, the satisfactory technical effect cannot be achieved if the addition ratio is inappropriate. It provides a sulfate-resistant concrete

Method used

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Effect test

Embodiment 1

[0024] Embodiment 1: The concrete mix number of this embodiment is 01, and each proportioning raw material is composed of:

[0025] The total amount of cementitious material is 450kg / m3, the total amount of sand is 720kg / m3, and the total amount of gravel is 900kg / m3, of which: cement is 55% of the total weight of cementitious material, which is 247.5kg / m3; Mineral powder 95# is 25% of the total weight of the cementitious material, which is 112.5kg / m3; silica fume is 4% of the total weight of the cementitious material, which is 18kg / m3; fly ash is 18% of the total weight of the cementitious material, 81kg / m3; preservative is 0.8% of the total weight of the cementitious material, which is 3.6kg / m3; water reducing agent is 0.8% of the total weight of the cementitious material, which is 3.6kg / m3; 0.8% of the weight is 3.6kg / m3; the air-entraining agent is 0.015% of the total weight of the cementitious material, which is 0.0675kg / m3.

Embodiment 2

[0026] Embodiment 2: The concrete mix number of this embodiment is 02, and each proportioning raw material is composed of:

[0027] The total amount of cementitious material is 660kg / m3, the total amount of sand is 850kg / m3, and the total amount of gravel is 1150kg / m3, of which: cement is 60% of the total weight of cementitious material, which is 396kg / m3; granulated blast furnace ore Powder 95# is 15% of the total weight of the cementitious material, which is 99kg / m3; silica fume is 10% of the total weight of the cementitious material, which is 66kg / m3; fly ash is 15% of the total weight of the cementitious material, which is 99kg / m3; preservative is 1% of the total weight of the cemented material, 6.6kg / m3; water reducing agent is 0.5% of the total weight of the cemented material, 3.3kg / m3; 0.5%, which is 3.3kg / m3; the air-entraining agent is 0.01% of the total weight of the cementitious material, which is 0.066kg / m3.

Embodiment 3

[0028] Embodiment 3: The concrete mix number of this embodiment is 03, and each proportioning raw material is composed of:

[0029] The total amount of cementitious material is 560kg / m3, the total amount of sand is 890kg / m3, and the total amount of gravel is 1180kg / m3, of which: cement is 67% of the total weight of cementitious material, which is 375.2kg / m3; Mineral powder 95# is 11% of the total weight of the cementitious material, which is 61.6kg / m3; silica fume is 6% of the total weight of the cementitious material, which is 33.6kg / m3; fly ash is 16% of the total weight of the cementitious material , is 89.6kg / m3; preservative is 1.5% of the total weight of the cemented material, which is 8.4kg / m3; water reducing agent is 1% of the total weight of the cemented material, which is 5.6kg / m3; rust inhibitor is gelled 1% of the total weight of the material is 5.6kg / m3; the air-entraining agent is 0.02% of the total weight of the cementitious material, which is 0.112kg / m3.

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Abstract

The invention belongs to the technical field of concrete of constructional engineering, and provides a sulfate-resistant concrete for solving the problems that, in the sulfate ion severely corroded environment, concrete structure is easy to destroy, service life of the concrete is reduced, but mixing amount of the existing compound concrete antiseptic is 4% of usage amount of cementitious material, proportion is too low, antiseptic effect is difficult to realize, or various types of concretes are used in actual application, under the condition of improper control on the antiseptic, technical effects cannot be satisfactory if adding proportion is inappropriate. The sulfate-resistant concrete is prepared from the cementitious material, sand, broken stones, cement, pelletized blast furnace mineral powder 95#, silica fume, fly ash, antiseptic, water-reducing agent, corrosion inhibitor and air entraining agent according to certain proportion. The sulfate-resistant concrete has the strength of C35 standard, effectively prevents damage caused by external force and inner stress, resists corrosion of sulfate ions, and has good compactness and anti-penetrability performance, thus, durability of the concrete is increased and service life of the concrete is prolonged. The sulfate-resistant concrete is safe and reliable, and completely overcomes corrosion of sulfate ions.

Description

technical field [0001] The invention belongs to the technical field of construction engineering concrete, and in particular relates to a sulfate-resistant concrete, which is the anti-corrosion concrete under the severe corrosion environment of sulfate ion in which the corrosion medium is a liquid medium. Background technique [0002] Concrete usually uses cement as the cementitious material, mixed with sand and stone coarse and fine aggregates, and mixed with water in a certain proportion to form capillary porous concrete. Since the amount of water added during mixing is more than the hydration water of cement, excess The water in the form of free water stays between the capillary pores of the concrete, and the liquid corrosive medium containing sulfate ions enters the interior of the concrete structure through the capillary pores, thereby achieving internal and external double erosion of the concrete and destroying the concrete structure. reduce the service life of concrete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08
Inventor 鞠治吉张志远戎彧颖王东荣崔彩霞王鹏许维勇蔚存荣曹志刚尹晋尧胡志国李春晖杨小林闫海龙杜鹏程
Owner CHINA SHANXI SIJIAN GRP
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