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A kind of self-compacting powder concrete for marine engineering and its preparation method and application

A technology of powder concrete and marine engineering, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high cost and large consumption, and achieve fast early strength, low heat of hydration, and adjustment range big effect

Active Publication Date: 2017-07-04
黄贺明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of grouting material contains a large amount of sulphoaluminate and is also mixed with a large amount of quartz sand to improve the corrosion resistance of the concrete structure. The admixture contains early strength agents and other components to improve the early strength of the concrete structure. However, the amount of sulfoaluminate components, quartz sand and other components used in this grouting material is large, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A self-compacting powder concrete for marine engineering, the self-compacting powder concrete is made of the following raw materials in proportion by mass:

[0057] 450 parts of ordinary Portland cement;

[0058] 180 parts of microsilica fume;

[0059] 120 parts of secondary fly ash;

[0060] 220 parts of limestone powder;

[0061] 30 parts of nanometer calcium carbonate powder;

[0062] 850 parts of river sand;

[0063] 10 parts of early strength superplasticizer;

[0064] 2 parts of thickener;

[0065] 4 parts of self-curing agent;

[0066] 25 parts of micro expansion agent;

[0067] 155 parts of water;

[0068] 4 servings of organic fiber.

[0069] Preparation and use method of the self-compacting powder concrete for marine engineering

[0070] Wherein, the average particle size of the ordinary Portland cement is 30-60 μm, the average particle size of the silica fume is 5-20 μm, the average particle size of the secondary fly ash is 10-30 μm, and the average p...

Embodiment 2

[0073] Except that each mass portion proportioning of raw materials is different, other is the same as embodiment 1;

[0074] The self-compacting powder concrete is made of the following raw materials in proportion by mass:

[0075] 550 parts of ordinary Portland cement;

[0076] 210 parts of microsilica fume;

[0077] 200 parts of secondary fly ash;

[0078] 300 parts of limestone powder;

[0079] 50 parts of nanoscale calcium carbonate powder;

[0080] 1100 parts of river sand;

[0081] 14 parts of early strength superplasticizer;

[0082] 5 parts of thickener;

[0083] 10 parts of self-curing agent;

[0084] 40 parts of micro expansion agent;

[0085] 200 parts of water;

[0086] 6 servings of organic fiber.

Embodiment 3

[0088] Except that each mass portion proportioning of raw materials is different, other is the same as embodiment 1;

[0089] The self-compacting powder concrete is made of the following raw materials in proportion by mass:

[0090] 480 parts of ordinary Portland cement;

[0091] 190 parts of microsilica fume;

[0092] 150 parts of secondary fly ash;

[0093] 250 parts of limestone powder;

[0094] 35 parts of nanoscale calcium carbonate powder;

[0095] 900 parts of river sand;

[0096] 11 parts of early strength superplasticizer;

[0097] 2 parts of thickener;

[0098] 5 parts of self-curing agent;

[0099] 30 parts of micro expansion agent;

[0100] 170 parts of water;

[0101] 4 servings of organic fiber.

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Abstract

The invention discloses self-compacting powder concrete for ocean engineering as well as preparation method and an application. According to the concrete, coal ash and limestone flour are simultaneously added, the precipitation amount of calcium hydroxide is reduced, and the problem in the prior art that the concrete is poor in corrosion resistance can be solved; moreover, the concrete is doped with nano-scale calcium carbonate and silica fume, so that the self-compacting property of the concrete structure is improved. The comprehensive cost of the concrete is low, the material source is wide, and a great amount of industrial wastes can be doped; the seawater corrosion resistance is good, the self-compacting property is good, the expandability is high, hydration heat is low, the adjusting range of the working expandability is large, the early strength is high, the strength of the concrete is greater than 50Mpa at the first day and greater than 130Mpa at the 28th day, and the self-compacting powder concrete is suitable for different types of ocean engineering.

Description

technical field [0001] The invention relates to the technical field of concrete production, in particular to a self-compacting powder concrete used in marine engineering, a preparation method and application thereof. Background technique [0002] At present, a large amount of concrete needs to be used in the construction of offshore facilities. During construction, it is required to complete the project in a short period of time under the harsh environment of the sea. There are strict requirements on the workability, pumpability, and early strength of concrete materials. At the same time , After the construction work is completed, the construction materials must work in underwater conditions rich in chlorides, sulfates and magnesium salts. The alkaline substances in the concrete itself react with the acidic substances, resulting in a decrease in the alkalinity of the concrete and the passivation of the steel bars. Moreover, the chloride ions carried by the concrete itself an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/06C04B18/08C04B14/28C04B111/74
CPCY02W30/91
Inventor 刘福财李斌王贻远肖敏陈桂祥李斯思孙俊阳黄贺明张信祯
Owner 黄贺明
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