Reinforcing admixture for premixed high-flow-state pervious concrete and preparation method of reinforcing admixture

A technology of permeable concrete and high fluidity, applied in the field of concrete admixtures, can solve the problems that limit the promotion and development of ready-mixed permeable concrete, and achieve the effects of increasing the construction time, improving the utilization rate, and improving the bond strength

Inactive Publication Date: 2020-10-16
武汉开思新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The promotion and development of ready-mixed permeable concrete in commercial mixing stations with great restrictions

Method used

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  • Reinforcing admixture for premixed high-flow-state pervious concrete and preparation method of reinforcing admixture

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A reinforcing admixture for ready-mixed high-fluid permeable concrete, including the following components: nano-silica microspheres, vitrified microspheres, water-soluble polymers, water-based blocked polyisocyanates, water-reducing agents, soluble Organic iron salts, air-entraining agents, retarders, and early strength agents; among them, nano-silica microspheres, vitrified microspheres, water-soluble polymers, water-based blocked polyisocyanates, water-reducing agents, and soluble organic iron salts , the mass ratio of air-entraining agent, retarder and early strength agent is 60:10:0.2:5:5:2:0.1:0.5:1;

[0024] The above water-based blocked polyisocyanate is a non-ionic water-based blocked polyisocyanate with an NCO content of 5%, a pH of 6 and a viscosity of 250 mPa.s. In practice, water-based blocked polyisocyanate with an NCO content of 5-6.2% can effectively cross-link and solidify each other without causing the reaction speed to be too fast and too violent. A pH...

Embodiment 2

[0037] A reinforcing admixture for ready-mixed high-fluid permeable concrete, including the following components: nano-silica microspheres, vitrified microspheres, water-soluble polymers, water-based blocked polyisocyanates, water-reducing agents, soluble Organic iron salts, air-entraining agents, retarders, and early strength agents; among them, nano-silica microspheres, vitrified microspheres, water-soluble polymers, water-based blocked polyisocyanates, water-reducing agents, and soluble organic iron salts The mass ratio of air-entraining agent, retarder and early strength agent is 65:15:1:5:9:3:0.2:0.8:1;

[0038] The above water-based blocked polyisocyanate is a non-ionic water-based blocked polyisocyanate with an NCO content of 5.5%, a pH of 7, and a viscosity of 350 mPa.s.

[0039] The deblocking temperature of the above water-based blocked polyisocyanate is 65°C.

[0040]Above-mentioned nano-silica microbead comprises one or more in fumed silica, precipitated silica an...

Embodiment 3

[0051] A reinforcing admixture for ready-mixed high-fluid permeable concrete, including the following components: nano-silica microspheres, vitrified microspheres, water-soluble polymers, water-based blocked polyisocyanates, water-reducing agents, soluble Organic iron salts, air-entraining agents, retarders, and early strength agents; among them, nano-silica microspheres, vitrified microspheres, water-soluble polymers, water-based blocked polyisocyanates, water-reducing agents, and soluble organic iron salts The mass ratio of air-entraining agent, retarder and early strength agent is 70:20:1.2:6:10:3:0.2:2:5;

[0052] The above water-based blocked polyisocyanate is a non-ionic water-based blocked polyisocyanate with an NCO content of 6.2%, a pH of 8, and a viscosity of 400 mPa.s.

[0053] The deblocking temperature of the above-mentioned aqueous blocked polyisocyanate is 75°C.

[0054] Above-mentioned nano-silica microbead comprises one or more in fumed silica, precipitated s...

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Abstract

The invention provides a reinforcing admixture for premixed high-flow-state pervious concrete and a preparation method of the reinforcing admixture. The reinforcing admixture is prepared from nano silicon dioxide microspheres, glass beads, soluble organic ferric salt, a water-soluble high-molecular polymer and water-based closed polyisocyanate, wherein the nano silicon dioxide beads can play a role in micro-aggregate filling, the compactness of the cementing slurry is improved, and the activity of the nano silicon dioxide beads can improve the interface area of the pervious concrete cementingslurry and aggregate and improve the bonding strength. The vitrified micro-beads can improve the fluidity of the pervious concrete. The soluble organic iron salt utilizes the coordination effect of carboxylic acid groups of organic acid on iron ions, the dissolving stability of iron ions in water is improved, and the phenomenon that iron ions react with hydroxide radicals in an aqueous solution toform flocculent precipitates to cause false coagulation of a pervious concrete mixture is prevented, the iron ions and the hydroxide radicals in the pervious concrete gradually form insoluble amorphous precipitates in the later hydration period, micropores in a cement cured product are blocked, durability is improved, and van alkali is inhibited.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a reinforcing admixture for ready-mixed high-flow permeable concrete and a preparation method thereof. Background technique [0002] With the promotion of my country's "sponge city" urban construction, there are more and more permeable concrete pavement projects. In the past, permeable concrete pavement construction was mainly based on on-site mixing production, which had defects such as small output, difficult measurement, large pollution of on-site mixing powder, high requirements for on-site construction sites, and unstable production quality of different construction teams. With the increase of urban projects, many construction sites do not meet the conditions for on-site mixing production, so the construction method of pre-mixing permeable concrete at commercial mixing stations is adopted and then transported to on-site pouring. However, the permeable concrete m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B14/06C04B14/22C04B24/04C04B24/383C04B24/38C04B24/2641C04B24/125C04B2103/302C04B2103/304C04B2103/22C04B22/08C04B24/122C04B24/16C04B22/14
Inventor 吴杰
Owner 武汉开思新材料有限公司
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