Seashore building cement resisting strong wind and big waves

A construction cement and coastal technology, applied in the field of cement, can solve the problems that the concrete structure cannot reach the service life, the structure is difficult to reach the designed service life, and the durability of the concrete structure is affected, so as to achieve excellent durability, improve strength and compactness, Excellent environmental protection effect

Inactive Publication Date: 2015-12-30
广西云燕特种水泥建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, many coastal water conservancy projects mainly use ordinary cement, and the corresponding seawater erosion-resistant concrete is mixed on site according to the requirements. However, due to the on-site mixing process and quality control problems, it is difficult for some structures to achieve the ideal design service life.
Poor construction will affect the durability of the concrete structure, such as defects in the concrete mixing process, incorrect dosage of admixtures, insufficient thickness of the steel protective layer, etc., which will make the concrete structure unable to reach the intended service life

Method used

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  • Seashore building cement resisting strong wind and big waves
  • Seashore building cement resisting strong wind and big waves
  • Seashore building cement resisting strong wind and big waves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A coastal building cement, comprising the following raw materials in parts by weight: 60 parts of slag; 10 parts of sulphoaluminate cement clinker; 5 parts of silica fume; 0.03 parts of composite activator; 4 parts of early strength agent; 0.3 part of water reducer ; 0.005 parts of air-entraining agent; 0.4 parts of retarder.

[0038] The sulphoaluminate cement clinker is the sulphoaluminate cement clinker produced by replacing aluminum ore with low-grade bauxite or aluminum slag at a ratio of 1:1, with a particle size of 3-30 μm; the weight percentage of its chemical composition For: Al 2 o 3 : 20%-40%, SiO 2 : 2%-10%, Fe 2 o 3 : 5%-15%, SO 3 : 5%-15%, C 4 A 3 S: 40%-65%, C 2 S: 10%-30%, C 4 AF: 20%-35%; the rest is CaO or CaCO 3 .

[0039] The slag is a powder obtained by grinding blast furnace slag, with a fineness of 400m 2 / kg~500m 2 / kg, the weight percentage of its chemical composition is: SiO 2： 30%-40%, Al 2 o 3 : 12%-18%, MgO: 8%-12%, Fe 2 o ...

Embodiment 2

[0048] A coastal building cement, comprising the following raw materials in parts by weight: 70 parts of slag; 30 parts of sulphoaluminate cement clinker; 10 parts of silica fume, 0.05 parts of composite activator; 3 parts of early strength agent; 0.4 part of water reducer ; 0.007 parts of air-entraining agent; 0.3 parts of retarder.

[0049] The sulphoaluminate cement clinker is the sulphoaluminate cement clinker produced by replacing aluminum ore with low-grade bauxite or aluminum slag at a ratio of 1:1, with a particle size of 3-30 μm; the weight percentage of its chemical composition For: Al 2 o 3 : 20%-40%, SiO 2 : 2%-10%, Fe 2 o 3 : 5%-15%, SO 3 : 5%-15%, C 4 A 3 S: 40%-65%, C 2 S: 10%-30%, C 4 AF: 20%-35%; the rest is CaO or CaCO 3 .

[0050] The slag is a powder obtained by grinding blast furnace slag, with a fineness of 400m 2 / kg~500m 2 / kg, the weight percentage of its chemical composition is: SiO 2： 30%-40%, Al 2 o 3 : 12%-18%, MgO: 8%-12%, Fe 2 o ...

Embodiment 3

[0059] A coastal building cement, comprising the following raw materials in parts by weight: 80 parts of slag; 20 parts of sulphoaluminate cement clinker; 5 parts of silica fume; 0.04 parts of composite activator; 3 parts of early strength agent; 0.5 part of water reducer ; 0.006 parts of air-entraining agent; 0.5 parts of retarder.

[0060] The sulphoaluminate cement clinker is the sulphoaluminate cement clinker produced by replacing aluminum ore with low-grade bauxite or aluminum slag at a ratio of 1:1, with a particle size of 3-30 μm; the weight percentage of its chemical composition For: Al 2 o 3 : 20%-40%, SiO 2 : 2%-10%, Fe 2 o 3 : 5%-15%, SO 3 : 5%-15%, C 4 A 3 S: 40%-65%, C 2 S: 10%-30%, C 4 AF: 20%-35%; the rest is CaO or CaCO 3 .

[0061] The slag is a powder obtained by grinding blast furnace slag, with a fineness of 400m 2 / kg~500m 2 / kg, the weight percentage of its chemical composition is: SiO 2： 30%-40%, Al 2 o 3 : 12%-18%, MgO: 8%-12%, Fe 2 o ...

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Abstract

The invention discloses seashore building cement resisting strong wind and big waves. The seashore building cement is prepared from the following raw materials in parts by weight: 60-80 parts of slag, 1-30 parts of sulphoaluminate cement clinker, 5-10 parts of silicon powder, 0.03-0.05 part of composite activating agent, 2-4 parts of early strength agent, 1-3 parts of water reducer, 0.005-0.007 part of air entraining agent, and 0.3-0.5 part of retarder. The production method comprises the steps of: respectively crushing, milling and homogenizing the slag, sulphoaluminate cement clinker, silicon powder, composite activating agent, and early strength agent, then batching, mixing and homogenizing according to the ratio, then adding the water reducer, air entraining agent, and retarder, and mixing and homogenizing to obtain a product. The green and ecological cement resisting strong wind and big waves also has good characteristics of high strength, seawater erosion resistance, seawater rushing resistance and the like besides of the performance of common cement, and is especially suitable for the engineering of ports and docks resisting wind and big wave impact and other erosion medium corrosion.

Description

technical field [0001] The invention relates to cement, in particular to a low-cost, energy-saving and environment-friendly green ecological cement. Background technique [0002] Most of the main structures of coastal water conservancy projects are concrete structures. And judging from the current development situation, in the next few decades, the materials used in the construction of coastal water conservancy projects will still be dominated by concrete structures. As we all know, once a durability problem occurs in a concrete project, it is very difficult to repair it. Therefore, the coastal water conservancy project should pay great attention to the durability design. For a long time, many coastal water conservancy projects mainly use ordinary cement, and the corresponding seawater erosion-resistant concrete is mixed on site according to the requirements. However, due to the on-site mixing process and quality control problems, it is difficult for some structures to achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B18/14
CPCY02W30/91
Inventor 黄芳杨毅农承战
Owner 广西云燕特种水泥建材有限公司
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