High-anticorrosion composite Portland cement and production method thereof

A composite silicate and high-resistance technology, which is applied in the field of Portland cement, can solve the problems of low design service life of marine structures, poor corrosion resistance of ordinary cement concrete, and affecting the durability of marine structures. Small ion mobility coefficient, high sulfate corrosion resistance coefficient, and the effect of avoiding loss of fluidity

Inactive Publication Date: 2018-12-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ordinary cement concrete has poor corrosion resistance and is prone to cracking and spalling in the marine environment, which seriously affects the durability of marine structures, resulting in the life of marine structures being much lower than the design service life

Method used

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  • High-anticorrosion composite Portland cement and production method thereof
  • High-anticorrosion composite Portland cement and production method thereof
  • High-anticorrosion composite Portland cement and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The high anti-corrosion composite Portland cement in this example is mainly composed of silica fume, slag, cement clinker, fly ash and gypsum; the volume content of each component, the particle size or specific surface area of ​​each component and the The performance tests of the prepared high-corrosion composite Portland cement are shown in Table 3.

[0035] Table 3 Proportion and properties of a high-corrosion composite Portland cement

[0036]

Embodiment 2

[0038] The high anti-corrosion composite Portland cement in this example is mainly composed of silica fume, metakaolin, slag, cement clinker, fly ash and gypsum; the volume content of each component, the particle size or specific surface area of ​​each component and The performance test of the high anti-corrosion composite Portland cement prepared in this example is shown in Table 4.

[0039] Table 4 Proportion and properties of a high-corrosion composite Portland cement

[0040]

Embodiment 3

[0042]The high anti-corrosion composite Portland cement in this example is mainly composed of silica fume, slag, cement clinker, steel slag and gypsum; the volume content of each component, the particle size or specific surface area of ​​each component, and the The performance tests of the high-corrosion composite Portland cement are shown in Table 5.

[0043] Table 5 Proportion and properties of a high-corrosion composite Portland cement

[0044]

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Abstract

The invention belongs to the technical field of Portland cements, and discloses a high-anticorrosion composite Portland cement and a production method thereof. The high-anticorrosion composite Portland cement is mainly comprises, by volume, 0.5-8% of a sub-nanometer cementing material, 20-35% of a high-fineness auxiliary cementing materials, 30-55% of a medium-fineness Portland cement clinker, 20-45% of a low-fineness auxiliary cementing material or an inert filler and 3-8% of gypsum. The composite Portland cement has a good compressive strength and a high corrosion resistance, for example, the 28 d compressive strength is 45-65 MPa, the sulfate corrosion resisting coefficient is 1.1-1.3, the seawater erosion resisting coefficient is 1.2-1.4, and the chloride ion diffusion coefficient is 0.4 * 10<-12> to 0.8 * 10<-12> m<2>/s. The composite Portland cement is applied to fields with high requirements of the corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of Portland cement, and relates to a preparation method of a high-corrosion-resistance cement-based material, in particular to a high-corrosion-resistance composite Portland cement and a preparation method thereof. The composite portland cement of the invention is applied to the engineering field of marine environment. Background technique [0002] With the support of national strategies such as the "Belt and Road Initiative", a large number of marine projects have been constructed, and the application range of composite Portland cement has been further promoted. However, in the marine environment, the durability of cement-based materials is very prominent, and the service life of marine structures is seriously affected. The concentration of chloride ions in seawater is about 19g / L, and the concentration of sulfate radicals is about 2.2g / L, which is much higher than the concentration of magnesium ions (abou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26
CPCC04B7/26Y02P40/10
Inventor 张同生田文立郭奕群韦江雄余其俊
Owner SOUTH CHINA UNIV OF TECH
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