Method for improving immobilization of chloridion in hardened cement paste

A technology of chloride ion and cement slurry, which is applied in the field of building materials, to achieve the effect of improving the fixing capacity of chloride ion, widening the application and alleviating corrosion

Active Publication Date: 2017-05-31
BEIJING UNIV OF TECH
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Problems solved by technology

But do not see the report of using glass powder and triethanolamine to improve the chloride ion fixing ability of cement paste or mortar so far

Method used

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  • Method for improving immobilization of chloridion in hardened cement paste
  • Method for improving immobilization of chloridion in hardened cement paste
  • Method for improving immobilization of chloridion in hardened cement paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0024] Table 3 The influence of triethanolamine and glass powder mixture on the fixed amount of chloride ion and curing rate

[0025]

[0026] In order to make the data more intuitive, draw the data in the above table into a line graph as shown in figure 1 .

[0027] From Table 3 and figure 1 It can be seen that when 3% glass powder and 0.025-0.1% triethanolamine are mixed in, the amount of chloride ion fixation is 7.46-7.96mg / g, and the curing rate is 76.43-81.15%. The amount of chloride ion fixation increases with the increase of triethanolamine content. Large, at 0-0.025%, the growth rate is the largest.

[0028] Based on the above Comparative Example 1, Comparative Example 2, and Example 3, it can be seen that in the cement slurry, the addition of 3-5% glass powder and 0.025-0.1% triethanolamine can significantly increase the chloride ion concentration in the hardened cement slurry. the ability to fix.

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Abstract

The invention provides a method for improving immobilization of chloridion in hardened cement paste, and belongs to the technical field of building materials. According to the method provided by the invention, 3-5% by mass of glass fiber and 0.025-0.1% by mass of triethanolamine are put into coal ash doped cement paste, so that the immobilization property of the chloridion in the hardened cement paste can be remarkably improved. The hardened cement paste prepared by using the method can be applied to sea sand or marine concrete, is capable of effectively inhibiting damage of chloridion, and has a function of alleviating rusting of concrete reinforcement.

Description

technical field [0001] The method belongs to the technical field of building materials, and relates to a method for improving the fixing capacity of chloride ions in hardened cement slurry. Background technique [0002] Chloride ion attack is one of the most important reasons for the damage to the durability of concrete structures, so it has always been concerned by the reinforced concrete industry. Chloride ions are unavoidable in the construction environment, especially in eastern coastal cities or marine projects, where the chlorine content in seawater can reach 1.8% (about 0.5mol / L) [Sun Bingyi, Wang Yongchen, Lin Guangyan. Water bodies in the mouth of the Yellow River and adjacent sea areas Research on total alkalinity in medium [J]. Oceanographic Journal (Chinese Edition). 1988(03): 294-301; Liu Wei, Xie Youjun, Dong Biqin, etc. Sea sand properties and sea sand concrete mechanical properties research [J]. Silicate Bulletin. 2014 (01): 15-22]; in Portland cement concre...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B14/22C04B103/60
CPCC04B40/0039C04B2103/60C04B24/122C04B14/22
Inventor 严建华柏晓强崔素萍王剑锋韩策郝廷宇于子豪崔延帅
Owner BEIJING UNIV OF TECH
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