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Use method with calcium-aluminum hydrotalcite as concrete early strength agent

A cement concrete and hydrotalcite technology, applied in the field of cement concrete early strength agent, can solve the problems of adding calcium aluminum hydrotalcite

Inactive Publication Date: 2010-03-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the problem of adding calcium aluminum hydrotalcite in specific construction

Method used

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  • Use method with calcium-aluminum hydrotalcite as concrete early strength agent
  • Use method with calcium-aluminum hydrotalcite as concrete early strength agent
  • Use method with calcium-aluminum hydrotalcite as concrete early strength agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 1 kg of No. 42.5 cement with 3 kg of standard sand, and stir evenly with a mixer. Then add 50 grams of calcium aluminum hydrotalcite, and stir evenly with a stirrer. Finally, slowly add 600 grams of tap water and stir with a stirrer until there are no lumps. The prepared concrete is then used at the construction site. Experimental results show that the compressive strength of concrete prepared by this method increases to 171% and the flexural strength increases to 161% after one day.

Embodiment 2

[0020] Mix 5 kg of No. 42.5 cement and 5 kg of standard sand, and stir evenly with a mixer. Then add 100 grams of calcium aluminum hydrotalcite, and stir evenly with a stirrer. Finally, 4.2 kg of tap water was slowly added, and stirred with a stirrer until there were no lumps. The prepared concrete is then used at the construction site. Experimental results show that the compressive strength of concrete prepared by this method increases to 170% and the flexural strength increases to 155% after 12 hours.

Embodiment 3

[0022] Mix 50 kg of No. 42.5 cement and 50 kg of standard sand, and stir evenly with a mixer. Then add 500 grams of calcium aluminum hydrotalcite, and stir evenly with a stirrer. Finally, 40 kg of tap water was slowly added, and stirred with a stirrer until there were no lumps. The prepared concrete is then used at the construction site. Experimental results show that the compressive strength of concrete prepared by this method increases to 143% and the flexural strength increases to 131% after 24 hours.

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Abstract

The invention discloses a using method for adopting calcium aluminum hydrotalcite as early a strength agent for cement concrete and belongs to the application technology field of hydrotalcite materials. The using steps are as follows: cement and freestones are mixed according to the ratio that the cement weight is 20 to 100 percent of the total weight of the cement and the freestone materials andthe adding weight of the cement is recorded; the calcium aluminum hydrotalcite is added according to the ratio of 0.1 to 5 percent of the adding weight of the cement and the cement is stirred and mixed uniformly; water that accounts for 40 to 90 percent of the cement is added weight and uniform stirring and mixing is carried out again; finally, the well mixed concrete is added to a construction position. The using method has the advantages of improving the anti-fold capability and the compression resistant capability respectively to 60 to 70 percent and 70 to 80 percent and having easy operation.

Description

technical field [0001] The invention belongs to the technical field of application of hydrotalcite materials, in particular to a method for using calcium aluminum hydrotalcite as an early strength agent for cement concrete. In the specific operation, the calcium-aluminum hydrotalcite is added as a new type of high-efficiency cement concrete early strength agent to the concrete composed of a certain proportion at a ratio of 0.1% to 5% of the cement mass. According to the difference of the added amount and the difference of the cement concrete paste, the improvement of the early flexural and compressive properties of the cement concrete material is 60%-70% and 70%-80% respectively. Background technique [0002] Cement concrete is by far the main engineering material. Its history is not long, about 160 years ago, due to the advent of Portland (hydraulic) cement, its importance is prominent in construction engineering. It is still an indispensable and irreplaceable engineering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B14/06C04B22/06
CPCC04B14/26C04B28/02
Inventor 张法智张博文徐赛龙段雪
Owner BEIJING UNIV OF CHEM TECH