Seawater resistant cement

An anti-seawater and cement technology, applied in the field of cement, can solve the problems of anti-seawater erosion, seawater erosion resistance and poor freeze-thaw resistance, and achieve the effects of improving erosion resistance, improving erosion resistance and improving corrosion resistance.

Active Publication Date: 2010-03-03
ZHEJIANG MINGFENG CEMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the existing ordinary Portland cement in seawater erosion resistance, seawater erosion resistance and freeze-thaw resistance, and to invent a kind of silica-aluminum active mixed material, micro-expansion component and erosion component. seawater resistant cement

Method used

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Embodiment Construction

[0047] The present invention has the following two embodiments.

[0048] One. the percentage by mass of each component of the formula of the first embodiment is as follows:

[0049] Portland cement clinker: 50%;

[0050] Gypsum: 4%;

[0051] Manganese slag: 12%;

[0052] Fly ash: 12%;

[0053] Slag: 12%;

[0054] Active SiO 2 : 4%;

[0055] Silicon-aluminum active composite material: 4%;

[0056] Bulking agent: 2%.

[0057] Two. the percentages by mass of each component of the formula of the second embodiment are as follows:

[0058] Portland cement clinker: 45%;

[0059] Gypsum: 5%;

[0060] Manganese slag: 14%;

[0061] Fly ash: 14%;

[0062] Slag: 14%;

[0063] Active SiO 2 : 4%;

[0064] Shangyu porcelain stone: 2%;

[0065] Expanding agent> 2%.

[0066] The characteristic mechanism of anti-seawater of the present invention is as follows:

[0067] 1. Corrosion resistance

[0068] The performance of cement against sulfate, chloride and other salts is rela...

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Abstract

The invention relates to seawater resistant cement, in particular to seawater resistant cement with excellent seawater corrosion resistance, which comprises the following components in percentage by weight: 40 to 55 percent of cement clinker, 3 to 5 percent of gypsum, 12 to 15 percent of manganese slag, 12 to 15 percent of fly ash, 12 to 15 percent of slag, 2 to 5 percent of active silica, 2 to 5percent of resistant components and 2 to 5 percent of micro-expansion components. The manufacturing process of the seawater resistant cement comprises the following steps of: pre-extruding to crush the cement clinker, the gypsum, the resistant components, the active silica and the manganese slag in a roll squeezer, mixing the powder with the fly ash, the slag and the micro-expansion components ina miller to grind, putting the ground mixture in a homogenizing silo to mix with the air while stirring, pouring the mixture out of the silo to package in bulk and then conveying the packages out of the factory. The seawater resistant cement has the excellent properties such as high strength, compactness, seepage resistance, seawater corrosion resistance, seawater scouring resistance and the like, and is particularly applied to underground, harbors, docks and other projects eroded by erosion media such as a sulfate and the like.

Description

technical field [0001] The invention is a kind of cement, especially a seawater-resistant cement with excellent corrosion resistance to seawater. Background technique [0002] In the marine environment, the erosion of seawater on concrete is mainly caused by the following factors: SO in seawater 4 2- 、CI - , Mg 2+ The chemical erosion of ions; the crystallization of salts in concrete under dry and wet conditions; the mechanical wear and impact of sea waves; the corrosion of steel bars in concrete and the destructive effects of freeze-thaw cycles. Therefore, seawater-resistant cement is required to have properties such as corrosion resistance, freeze-thaw resistance, erosion resistance, and wear resistance. At present, ordinary Portland cement and a small amount of sulfate-resistant cement are mainly used in ports, docks, and marine engineering in my country. This type of cement has poor impermeability, wear resistance, and compactness, so it is resistant to seawater eros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26
CPCC04B2111/24C04B28/02Y02W30/91C04B18/08C04B18/141C04B18/144C04B18/146C04B22/008C04B22/143C04B40/0028C04B2103/61
Inventor 王瑶法
Owner ZHEJIANG MINGFENG CEMENT
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