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Concrete steel fiber antirust agent with self-antirust function and preparation method of concrete steel fiber antirust agent

A technology of steel fiber and concrete, which is applied in the field of steel fiber for concrete, and can solve problems such as the inability to deal with the rust prevention of steel fiber

Active Publication Date: 2014-04-23
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims at the problem that steel antirust agents in the prior art cannot deal with the rust prevention of steel fibers in concrete polluted by chloride salts, and provides a kind of antirust agent for steel fibers for concrete that can realize its own antirust and a preparation method thereof, and Application of the steel fiber antirust agent in the steel fiber preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: After preparing 20% ​​isopropanol and 0.5% carboxybenzotriazole and stirring evenly, add a mixture of aminopropyltriethoxysilane and propyltriethoxysilane with a mass ratio of 2:1, Make the mass fraction of silane solution 5%. Soak the ultrasonically cleaned steel fibers in this solution for 2 minutes, and then dry them in hot air at 80°C for 2 hours. According to CECS13-2009 "Fiber Concrete Test Method Standard" to test the bonding force between steel fiber and cement mortar, use salt water mixed concrete to evaluate the self-rust prevention ability of steel fiber in chloride-salt contaminated concrete, and evaluate the storage process of steel fiber by placing it in the open air Anti-corrosion ability in. The final results show that the ratio of the bond strength between anti-rust steel fiber and mortar to that of steel fiber without anti-rust treatment is 105%. After 180 days of curing of steel fiber concrete mixed with salt water, the corrosion rate of s...

Embodiment 2

[0038] Example 2: After preparing 30% methanol and 0.4% benzotriazole and stirring evenly, add bis(3-trimethoxysilylpropyl)amine and propyltriethoxy with a mass ratio of 2:1 Silane mixture, so that the mass fraction of silane solution is 10%. Soak the ultrasonically cleaned steel fibers in this solution for 2 minutes, and then dry them in hot air at 80°C for 2 hours. The ratio of the bond strength between the obtained antirust steel fiber and concrete to the steel fiber without antirust treatment is 99%. After 180 days of curing of the steel fiber concrete mixed with salt water, the corrosion rate of the steel fiber is 2.9%. After 180 days in the open air, the steel fiber The surface corrosion rate is 2.1%.

Embodiment 3

[0039] Example 3: After preparing 30% ethanol, 0.2% thiourea, and 0.2% benzotriazole and stirring evenly, add bis(3-trimethoxysilylpropyl)amine and Propyltriethoxysilane mixture, so that the mass fraction of silane solution is 8%. Soak the ultrasonically cleaned steel fibers in this solution for 2 minutes, and then dry them in hot air at 80°C for 2 hours. The ratio of the bond strength between the obtained anti-rust steel fiber and concrete to the steel fiber without anti-rust treatment is 107%. After 180 days of curing of the steel fiber concrete mixed with salt water, the corrosion rate of the steel fiber is 3.2%. After 180 days in the open air, the steel fiber The fiber surface rust rate is 2.3%.

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PUM

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Abstract

The invention discloses a concrete steel fiber antirust agent with a self-antirust function and a preparation method of the concrete steel fiber antirust agent. The concrete steel fiber antirust agent with the self-antirust function comprises organosilane, alcohol, a rust resistance component and water. The rust resistance component is absorbed on the surface of steel fiber to form a compact hydrophobic protection film, so that the steel fiber is good in anti-corrosion effect in the atmospheric environment; the concrete steel fiber antirust agent with the self-antirust function is excellent in self antirust function in concrete which is polluted by chlorine salt; the formed protection film has no influence on binding power between the steel fiber and the concrete, so that the effect of enhancing and resisting crack of the concrete is not influenced.

Description

technical field [0001] The invention relates to the field of steel fibers for concrete, and more specifically, the application relates to a self-rust-proof steel fiber and a preparation method thereof. Background technique [0002] The application environment of steel fiber for concrete is special. During the concrete mixing process, it is mixed with cement, stone, sand, water and other raw materials. With the progress of cement hydration reaction, it will bond with the concrete matrix and form a whole, thus improving Concrete strength, prevention of concrete cracking (that is, reinforcement, crack resistance), etc., so the bonding performance of steel fibers and concrete matrix is ​​extremely important. [0003] Long-term storage of steel fibers before application usually causes surface corrosion, and mixing them into concrete will directly affect their crack resistance and strengthening effects; Corrosion often occurs due to the effect, and yellow rust products are formed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/60
Inventor 刘加平陈翠翠蔡景顺刘建忠吕进
Owner JIANGSU SOBUTE NEW MATERIALS