Sea sand powder concrete

A technology for powder concrete and sea sand, which is applied in the field of concrete materials, can solve the problems of low production efficiency, high cost, and is not suitable for large-scale production of sea sand concrete, and achieves the effect of promoting hydration reaction and reducing water consumption.

Active Publication Date: 2015-11-25
黄贺明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this solution can solve the problem of corrosion of steel bars by chloride ions in sea sand, and enhance the strength and durability of concrete structures, the sea sand used in the solution needs to be desalinated, and the desalination process is costly and has low production efficiency. Suitable for mass production of sea sand concrete

Method used

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  • Sea sand powder concrete

Examples

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Effect test

Embodiment 1

[0048]A self-compacting sea-sand concrete, comprising the following raw materials in parts by weight:

[0049] 450 parts of ordinary Portland cement;

[0050] Mineral active admixture; 250 parts;

[0051] 50 parts of inert admixture;

[0052] 850 parts of sea sand;

[0053] 24 parts of early strength superplasticizer;

[0054] 145 parts of sea water;

[0055] 2 parts organic fiber;

[0056] 0.08mm~0.35mm copper-plated steel fiber 78 parts.

[0057] Among them, the average particle size of the cement is less than 60 μm, and the grade is not lower than 42.5 grade strength; the particle size range of the mineral active admixture is 0.10~60 μm; the average particle size of the inert admixture is 0.01~80 μm The average particle size of the sea sand is below 4.75mm, the particles are continuously graded medium sand and fine sand, and the mud content is less than 0.5%; the organic fiber is a PVA fiber with a high-strength elastic modulus, and its length is 6-12mm; The tensile ...

Embodiment 2

[0064] Except that the formula of sea sand powder concrete and the formula of inert admixture and mineral active admixture are different, other conditions are the same as embodiment 1;

[0065] A self-compacting sea-sand concrete, comprising the following raw materials in parts by weight:

[0066] 750 parts of ordinary Portland cement;

[0067] 450 parts of mineral active admixture;

[0068] 150 parts of inert admixture;

[0069] 1400 parts of sea sand;

[0070] 32 parts of early strength superplasticizer;

[0071] 220 parts of sea water;

[0072] 4 parts organic fiber;

[0073] 0.08mm~0.35mm copper-plated steel fiber 250 parts.

[0074] Wherein, the mineral active admixture includes the following raw materials by weight: 20% silica fume, 30% mineral powder, 25% fly ash, 20% ceramic polishing powder, and 5% steel slag; the inert admixture includes the following weight Percentage of raw materials: limestone powder 10%, nano calcium carbonate 80%, quartz stone powder 10%....

Embodiment 3

[0076] Except that the formula of sea sand powder concrete is different, other conditions are with embodiment 1;

[0077] A self-compacting sea-sand concrete, comprising the following raw materials in parts by weight:

[0078] 550 parts of ordinary Portland cement;

[0079] 330 parts of mineral active admixture;

[0080] 80 parts of inert admixture

[0081] 950 parts of sea sand;

[0082] 26 parts of early-strength superplasticizer;

[0083] 165 parts of sea water;

[0084] 2 parts organic fiber;

[0085] 0.08mm~0.35mm copper-plated steel fiber 100 parts.

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Abstract

The invention relates to sea sand powder concrete. The sea sand powder concrete comprises, by weight, 450-750 parts of cement, 250-450 parts of active mineral admixture, 50-150 parts of inert admixture, 850-1400 parts of sea sand, 24-32 parts of high efficiency slushing agents, 145-220 parts of seawater, 2-4 parts of organic fiber and 78-250 parts of copper-bearing steel fiber with the thickness ranging from 0.08 mm to 0.35 mm. According to the sea sand powder concrete, a compact stacking structure principle is adopted, the interior of the concrete is almost seamless in communication channel through optimization of particle size gradation, and a channel of internal ion medium migration is further eliminated through secondary hydration of the active mineral additive, so that the powder concrete obtained by stirring the raw materials through the seawater and the sea sand is ultra-high performance concrete with high durability, corrosion resistance and high mechanic property.

Description

field of invention [0001] The invention relates to the field of concrete materials, in particular to sea sand powder concrete prepared by using sea water and sea sand. Background technique [0002] With the rapid development of my country's economy, the demand for concrete in construction projects is increasing day by day. In the concrete manufacturing industry, a large amount of river sand is generally added to the concrete to obtain the desired strength of the final concrete structure. However, the mass production of concrete products has depleted limited river sand resources, which in turn endangers river flood control and urban water supply. [0003] Compared with river sand, sea sand resources are more abundant. Using sea sand to prepare concrete is an ideal choice to solve the problem of overexploitation of river sand resources. However, because sea sand contains a certain amount of chloride ions, sulfate ion anions and metal cation ions, the steel structure in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/06C04B14/28C04B18/16
CPCY02W30/91
Inventor 刘福财肖敏王贻远李斌张信祯黄贺明
Owner 黄贺明
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