Concrete for maritime works and application thereof

A technology of marine concrete and cementitious materials, applied in the field of building materials, can solve problems such as chemical corrosion and erosion, and achieve the effects of good crack resistance, good carbonation resistance, and excellent chemical corrosion resistance

Pending Publication Date: 2019-07-05
ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concrete obtained by directly applying the existing concrete formula on the building will have obvious chemica

Method used

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  • Concrete for maritime works and application thereof
  • Concrete for maritime works and application thereof
  • Concrete for maritime works and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The application provides a marine concrete, which includes: machine-made sand, gravel, cementitious material, admixture and water. Wherein, the sand rate of marine concrete is 41%-45%, and the cementitious material includes cement and mineral admixture, and the mineral admixture accounts for 60-80% of the total cementitious material, and the admixture The dosage is 1.0-1.5%, and the water-binder ratio of the marine concrete is less than 0.4.

[0044] In the marine concrete of Example 1, the amount of cementitious material is 411kg / m 3 . The use of machine-made sand accounts for 43% of marine concrete, that is, the sand rate is 43%. The maximum particle size of the crushed stones used is 25 mm, and in some implementation manners, crushed stones continuously graded from 5 mm to 25 mm may also be used. The dosage of the admixture is 1.0%. The admixture can be selected from polycarboxylate high-performance water reducing agent, and the water reducing rate of the admixtur...

Embodiment 2

[0052] The application provides a marine concrete, which includes: machine-made sand, gravel, cementitious material, admixture and water. Wherein, the sand rate of marine concrete is 41%-45%, and the cementitious material includes cement and mineral admixture, and the mineral admixture accounts for 60-80% of the total cementitious material, and the admixture The dosage is 1.0-1.5%, and the water-binder ratio of the marine concrete is less than 0.4.

[0053] In Example 2, the marine concrete includes machine-made sand 136kg / m 3 , gravel 1022kg / m 3 , cementitious material 390kg / m 3 , admixture 3.9kg / m 3 and water 152kg / m 3 . Cementitious materials include: cement 118kg / m 3 , fly ash 136kg / m 3 , mineral powder 136kg / m 3 . The water-binder ratio of the above-mentioned marine concrete is 0.39.

[0054] The maximum particle size of the gravel is 25mm, and the sand rate is about 45%. The sand rate refers to the percentage of the mass of the machine-made sand to the total ma...

Embodiment 3

[0058] The application provides a marine concrete, which includes: machine-made sand, gravel, cementitious material, admixture and water. Wherein, the sand rate of marine concrete is 41%-45%, and the cementitious material includes cement and mineral admixture, and the mineral admixture accounts for 60-80% of the total cementitious material, and the admixture The dosage is 1.0-1.5%, and the water-binder ratio of the marine concrete is less than 0.4.

[0059] In Example 3, the marine concrete includes machine-made sand 790kg / m 3 , gravel 1047kg / m 3 , cementitious material 411kg / m 3 , admixture 4.11kg / m 3 and water 152kg / m 3 . Cementitious materials include: cement 123kg / m 3 , fly ash 144kg / m 3 , mineral powder 144kg / m 3 . The water-binder ratio of the above-mentioned marine concrete is 0.37.

[0060] The gravel adopts 5mm-25mm continuous graded gravel, and the sand rate is about 43%. The sand rate refers to the percentage of the mass of machine-made sand in the total m...

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Abstract

The present invention relates to the field of building materials, and provides concrete for maritime works. The concrete at least includes manufactured sand, broken stone, a binder material, an admixture and water, wherein the concrete has a sand ratio of 41% to 45%, the binder material comprises cement and a mineral admixture, the mineral admixture occupies 60-80% of the total amount of the cementitious material, the doping ratio of the admixture is 1.0-1.5%, and the water-to-binder ratio of the concrete is less than 0.4. The concrete has good fluidity, stable performance, excellent mechanical properties, chemical corrosion resistance against sulfate penetration, against chloride ion penetration and the like, and good durability, and can be adapted to maritime construction and other wading environments. The concrete can improve the service lifetime and safety of buildings.

Description

technical field [0001] The invention mainly relates to the field of building materials, in particular to marine concrete and its application. Background technique [0002] Currently, water-wading buildings, such as sea-crossing or river-crossing bridges, lighthouses, and tunnels, are faced with complex effects such as chemical corrosion such as chloride ion erosion in water, alternating wet and dry, and wave impact. [0003] The concrete used in the prior art generally lacks the functions related to construction and normal use in water bodies. The concrete obtained by directly applying the existing concrete formula on the building will have obvious chemical corrosion, and will appear relatively serious erosion under the action of alternating wet and dry and wave impact. In the application scenario of reinforced concrete, the steel bars wrapped in concrete are more susceptible to corrosion due to the lack of corrosion resistance, penetration resistance, and durability of the...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/02C04B111/20C04B111/24C04B111/34
CPCC04B28/02C04B28/04C04B2111/20C04B2111/24C04B2111/343C04B2201/50C04B18/08C04B18/141C04B14/02C04B14/06C04B2103/302C04B2103/0068
Inventor 崔春亮刘怀刚陈传磊吴建峰高世强肖向荣李鸿文谢马贤彭寄望陈振宇陶坡赵胜
Owner ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD
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