Toughening and corrosion-resistant concrete additive

An additive and corrosion-resistant technology, which is applied in the field of toughened and corrosion-resistant concrete additives and its preparation, can solve the problems of compatible concrete structure damage and high engineering cost, improve stress distribution and failure form, reduce construction costs, reduce Effect of Crack Width

Active Publication Date: 2019-04-16
武汉市浩盛特种建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the project of adding fiber-composite high-performance concrete and external anti-corrosion and rust inhibitors has a high engineering cost and needs to add a variety of admixtures. The compatibility problem between admixtures may also cause damage to the concrete structure.

Method used

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  • Toughening and corrosion-resistant concrete additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a kind of toughened and corrosion-resistant concrete additive, including the following raw materials in mass percentage: mineral powder 35%, silicon micropowder 40%, polypropylene fiber 9%, modified furan resin 9%, silane coupling agent 0.1% , p-toluenesulfonic acid 0.2%, sodium sulfate 6.7%.

[0034] The modified furan resin is a phenolic modified furan resin.

[0035] The preparation method of a toughened and corrosion-resistant concrete additive described in this embodiment comprises the following steps: mixing mineral powder, modified furan resin, and silane coupling agent uniformly in proportion, and placing them in a grinder to grind to obtain a mixture , and then put the above-mentioned mixture, silicon micropowder, polypropylene fiber, p-toluenesulfonic acid, and sodium sulfate into a stirring container in proportion, and stir evenly at room temperature to obtain the additive.

[0036] This embodiment provides a method for using the tou...

Embodiment 2

[0044] This embodiment provides a toughening and corrosion-resistant concrete additive. Compared with Example 1, the difference is that the preparation method of the modified furan resin is: alkylated hydroxymethylphenol, furfuryl alcohol by mass ratio Mix 3:1, gradually raise the temperature to 140°C, add toluene to azeotropically remove water, and circulate distillation. After the water phase and toluene are removed by distillation, the temperature is lowered and cooled, and the material is discharged when the reaction reaches a suitable viscosity (4 cups for 25 seconds), and the modified furan resin is obtained.

[0045] Additives were prepared according to the method described in Example 1 to act on concrete to obtain concrete specimens for testing.

Embodiment 3

[0047] This embodiment provides a kind of toughened and corrosion-resistant concrete additive, compared with embodiment 1, the difference is that,

[0048] The preparation method of the modified furan resin is as follows: mix alkylated hydroxymethylphenol and furfuryl alcohol in a mass ratio of 3:1, gradually raise the temperature to 140° C., add toluene to azeotropically remove water, and circulate distillation. After the water phase and toluene are removed by distillation, the temperature is lowered and cooled, and the material is discharged when the reaction reaches a suitable viscosity (4 cups for 25 seconds), and the modified furan resin is obtained.

[0049] The preparation method of the alkylated hydroxymethyl phenol is as follows: heat and melt the phenol, then add an appropriate amount of concentrated sulfuric acid, heat the mixture to 100° C., then gradually add styrene, and the reaction is exothermic. When all the styrene has been added, the temperature should rise ...

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Abstract

The invention discloses a toughening and corrosion-resistant concrete additive. The toughening and corrosion-resistant concrete additive is characterized by being prepared from, by mass, 30-40% of mineral powder, 30-40% of silicon micropowder, 6-12% of polypropylene fiber, 6-12% of modified furan resin, 0.1-0.2% of a silane coupling agent, 0.1-0.2% of p-toluenesulfonic acid and 4-8% of sodium sulfate. The toughening and corrosion-resistant concrete additive has the advantages that through the synergistic action of the silicon micropowder, the polypropylene fiber and the furan resin, the toughness and corrosion resistance of concrete can be significantly improved, the raw materials are easy to obtain, the preparation process is simple, the construction is simple and convenient, the incorporation of thermosetting resin can reduce the dosage of a gel material, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a toughening and corrosion-resistant concrete additive, a preparation method and an application method thereof. Background technique [0002] At present, high-performance concrete is mainly used in the form of pressure-bearing structures in engineering, and is rarely used in the forms of tension-bend structures. For some concrete structures with special requirements, the partial concrete structure, such as the mid-span closing section of the rigid frame bridge, will be in a complex stress state and will have a large tensile stress. Due to the natural brittle nature of concrete, its tensile, The flexural strength is very low and can cause cracking. The water-gel ratio of high-performance concrete is low, and the increase in compactness is beneficial to durability, but the accompanying autogenous shrinkage deformation is also large, which can easily lead to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B24/30C08G16/04C04B28/00C04B103/61
CPCC04B24/30C04B28/00C04B40/0039C04B2103/61C04B2111/20C04B2111/2015C04B2111/2046C04B2201/50C04B2201/52C08G16/04C04B18/141C04B14/062C04B16/0633C04B24/42C04B24/20C04B22/147C04B14/02C04B14/06C04B18/08C04B2103/302
Inventor 杨亚运凌鼎山方周
Owner 武汉市浩盛特种建材有限责任公司
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