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High-fluidity sleeve grouting material for steel bar connection

A high-fluidity, sleeve grouting technology, applied in structural elements, building components, buildings, etc., can solve problems such as adverse effects on project quality and progress, poor fluidity advantages, and insufficient initial fluidity, and improve volume stability. The effect of improving the initial fluidity and excellent fluidity

Active Publication Date: 2019-08-16
武汉沃尔浦科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the engineering application of sleeve grouting material for steel bar connection, the fluidity of the grouting material is an important indicator affecting the construction quality and progress. The initial fluidity of the grouting material is insufficient or the fluidity loss is too large in half an hour, which will cause the grouting to be insufficient. Dense, need refilling or rework, which will adversely affect the quality and progress of the project to a certain extent
[0004] Most of the grouting materials produced by the existing technology have time-lapse loss, poor fluidity, and many materials are used, and the production process is complicated. Under the premise of satisfying the strength and vertical expansion rate, the sleeve grouting material does not segregate and does not bleed. , the greater the fluidity, the better, which can not only ensure the construction quality, but also speed up the progress of grouting construction, so it is of great practical significance to further improve the fluidity of grouting materials

Method used

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  • High-fluidity sleeve grouting material for steel bar connection
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  • High-fluidity sleeve grouting material for steel bar connection

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of grouting material for high-fluidity steel bar sleeve connection is composed of the following materials:

[0040]

[0041] Among them, the compounding ratio of the composite cementitious material is: 380g of 52.5 grade ordinary Portland cement, 20g of 42.5 grade sulphoaluminate cement.

[0042] The compounding ratio of fine aggregate is: 250g of 20-40 mesh quartz sand, 200g of 40-80 mesh quartz sand, and 150g of 80-120 mesh quartz sand.

[0043] The compounding ratio of functional components is: polycarboxylate superplasticizer 1.54g, boric acid 0.05g, hydroxypropyl methyl cellulose ether 0.05g, diatomaceous earth 109.6g, silica fume 109.6g.

[0044] The preparation method of functional components is as follows: add 109.6g of diatomaceous earth to 100g of cyclohexane to disperse evenly to form a suspension, add 0.025g of silane coupling agent KH550 and continue to disperse for 5 minutes, then add 1.54g of polycarboxylic acid Water reducer, 0.05g boric acid,...

Embodiment 2

[0048] A kind of grouting material for high-fluidity steel bar sleeve connection is composed of the following materials:

[0049]

[0050] Among them, the compounding ratio of the composite cementitious material is: 430g of 52.5 grade ordinary Portland cement, 20g of 42.5 grade sulphoaluminate cement.

[0051] The compounding ratio of fine aggregate is: 350g of 20-40 mesh quartz sand, 100g of 40-80 mesh quartz sand, and 100g of 80-120 mesh quartz sand.

[0052] The compounding ratio of functional components is: polycarboxylate superplasticizer 9.45g, boric acid 0.07g, hydroxypropyl methylcellulose ether 0.05g, diatomaceous earth 274g, silica fume 274g.

[0053] The preparation method of functional components is as follows: 274g of diatomite is added to 100g of cyclohexane to disperse evenly to form a suspension, add 0.03g of silane coupling agent KH550 and continue to disperse for 6 minutes, then add 9.45g of polycarboxylic acid Water agent, 0.07g boric acid, 0.05g hydroxy...

Embodiment 3

[0057] A kind of grouting material for high-fluidity steel bar sleeve connection is composed of the following materials:

[0058]

[0059] Among them, the compounding ratio of the composite cementitious material is: 450g of 52.5 grade ordinary portland cement, and 50g of 42.5 grade sulphoaluminate cement.

[0060] The compounding ratio of fine aggregate is: 150g of 20-40 mesh quartz sand, 200g of 40-80 mesh quartz sand, and 150g of 80-120 mesh quartz sand.

[0061] The compounding ratio of functional components is: polycarboxylate superplasticizer 2.50g, boric acid 0.13g, hydroxypropyl methyl cellulose ether 0.07g, diatomaceous earth 164.4g, silica fume 164.4g.

[0062] The preparation method of functional components is as follows: add 164.4g of diatomaceous earth to 100g of cyclohexane to disperse evenly to form a suspension, add 0.035g of silane coupling agent KH550 and continue to disperse for 7 minutes, then add 2.50g of polycarboxylic acid Water reducer, 0.13g tartari...

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Abstract

The invention provides a high-fluidity sleeve grouting material for steel bar connection. The high-fluidity sleeve grouting material mainly comprises a composite cementing material, fine aggregate, aworking performance modification component, a pore structure regulator, an early strength agent and water. The initial fluidity of the sleeve grouting material is as high as 340-360 mm, the sleeve grouting material is free of gradual loss, and even the half-hour fluidity of the sleeve grouting material is higher than the initial fluidity and can reach 360-380 mm. The grouting material is free of bleeding and sinking and extremely excellent in construction performance. The defects that an existing sleeve grouting material is large in fluidity loss, short in operable time, incompact in groutingand the like are overcome. The strength, the vertical expansion rate and other indexes of the grouting material are much higher than those of similar grouting materials.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a sleeve grouting material for connecting steel bars with high fluidity. Background technique [0002] At present, the steel sleeve grouting connection technology is widely used in prefabricated concrete structures, and the sleeve grouting material is used as a bonding material, so that the sleeve and the connected steel bars can be effectively combined to work together. [0003] In the engineering application of sleeve grouting material for steel bar connection, the fluidity of the grouting material is an important indicator affecting the construction quality and progress. The initial fluidity of the grouting material is insufficient or the fluidity loss is too large in half an hour, which will cause the grouting to be insufficient. It is dense and needs to be refilled or reworked, which will have a negative impact on the quality and progress of the project to a certa...

Claims

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Application Information

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IPC IPC(8): C04B28/06E04C5/16C04B111/70
CPCC04B28/06C04B2111/70C04B2201/50E04C5/162C04B7/02C04B14/06C04B24/24C04B22/0013C04B24/06C04B24/383C04B24/42C04B14/08C04B18/146C04B24/129C04B2103/12
Inventor 刘卓栋
Owner 武汉沃尔浦科技有限公司