Silicate cement of precenting chlorate corrosion

A technology of portland cement and chloride salt, applied in the field of portland cement, can solve the problems of high technical threshold, increased cost, difficult to popularize and use in anti-chloride salt corrosion concrete, easy to ensure quality and reduce project cost , easy-to-use effects

Inactive Publication Date: 2006-06-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (3) Since the quality of cement and mineral admixtures produced by different manufacturers is different, each specific project must study the compatibility of cement, mineral admixtures and chemical admixtures, and special anti-chlorine The mix design of salt-corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0044] Example 1

[0045] The raw material mass ratio of Portland cement 1 with moderate resistance to chloride salt erosion is cement clinker: granulated blast furnace slag: fly ash: limestone: gypsum=26:35:27:5:7. Its performance test values ​​are shown in Table 1.

Example Embodiment

[0046] Example 2

[0047] The mass ratio of the raw materials of Portland cement 1 with high resistance to chloride salt erosion is cement clinker: granulated blast furnace slag: fly ash: limestone: gypsum: grinding aid = 26: 50: 14: 4: 5: 1, The grinding aid is triethanolamine. Its performance test values ​​are shown in Table 1.

Example Embodiment

[0048] Example 3

[0049] The raw material mass ratio of Portland cement 2 with medium resistance to chloride corrosion is cement clinker: fly ash: gypsum: rust inhibitor: expansion agent: grinding aid=54:30:4:8:3:1, The grinding agent is diethanolamine. Its performance test values ​​are shown in Table 2.

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Abstract

A silicate cement able to resist against corrosion of Cl salt is proportionally prepared from silicate cement clinker, mixture material, gypsum, assistant and optional short fibers through proportional mixing.

Description

technical field [0001] The invention belongs to the field of Portland cement, in particular to a Portland cement resistant to chlorine salt erosion. Background technique [0002] Reinforced concrete structures have been used for hundreds of years in chloride-salt environments (such as marine environments, deicing salt environments, saline-alkali environments, and environments containing a large amount of chloride ions in water and soil, etc.), but ordinary Portland cement is used to prepare concrete. At the same time, due to the poor resistance to chloride ion erosion of concrete, the steel bars in the structure will corrode quickly, resulting in premature failure of the building. According to the survey, the durable life of reinforced concrete structures made of ordinary Portland cement is usually only about 20 years in the marine environment, which is far from meeting the requirement of 50 years or even longer. [0003] To solve this problem, slag cement was initially use...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/04C04B22/14C04B111/20
Inventor 杨医博梁松莫海鸿陈尤雯
Owner SOUTH CHINA UNIV OF TECH
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