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High-fluidity sleeve grouting slurry for rebar connection and preparation method thereof

A technology of sleeve grouting and high fluidity, applied in the field of building materials, can solve the problems of insufficient initial fluidity, poor fluidity retention ability, low initial fluidity, etc., and achieves improvement of initial fluidity and small loss of fluidity over time. , smooth surface effect

Inactive Publication Date: 2018-12-07
成都宏基建材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to further improve the fluidity of the sleeve grouting material for steel bar connection, overcome the insufficient initial fluidity or excess compared with the specification of the existing sleeve grouting material for steel bar connection in actual engineering applications problem, the invention provides a high fluidity sleeve grouting material for steel bar connection and its preparation method

Method used

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  • High-fluidity sleeve grouting slurry for rebar connection and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026]A high-fluidity sleeve grouting material for steel bar connection, consisting of the following materials: 400 parts of cement, 100 parts of admixture, 480 parts of sand, 0.06 parts of water-retaining agent, 1.5 parts of defoaming agent, and 7 parts of composite water-reducing agent parts, 45 parts of composite retarder, 36 parts of composite expansion agent, 9 parts of composite early strength agent, 140 parts of water, in parts by weight.

[0027] Among them, the compounding ratio of cement is: 328 parts of 52.5 grade ordinary Portland cement, 48 parts of 52.5 grade sulphoaluminate cement, and 24 parts of 62.5 grade high alumina cement, calculated in parts by weight.

[0028] Among them, the compounding ratio of the admixture is: 40 parts of Class I fly ash, 25 parts of active silica fume, superfine brucite powder (d 97 =2um) 35 parts, in parts by weight.

[0029] Among them, the compounding ratio of sand is: 96 parts of 20-40 mesh quartz sand, 264 parts of 40-70 mesh ...

Embodiment 2

[0038] A high-fluidity sleeve grouting material for steel bar connection, consisting of the following materials: 390 parts of cement, 90 parts of admixture, 480 parts of sand, 0.06 parts of water-retaining agent, 1.5 parts of defoaming agent, and 7 parts of composite water-reducing agent parts, 45 parts of composite retarder, 36 parts of composite expansion agent, 9 parts of composite early strength agent, 140 parts of water, in parts by weight.

[0039] Among them, the compounding ratio of cement is: 319.8 parts of 52.5 grade ordinary Portland cement, 46.8 parts of 52.5 grade sulphoaluminate cement, and 23.4 parts of 62.5 grade high alumina cement, calculated in parts by weight.

[0040] Among them, the compounding ratio of the admixture is: 36 parts of Class I fly ash, 22.5 parts of active silica fume, superfine brucite powder (d 97 =2um) 31.5 parts, in parts by weight.

[0041] Among them, the compounding ratio of sand is: 96 parts of 20-40 mesh quartz sand, 264 parts of 4...

Embodiment 3

[0049] A high-fluidity sleeve grouting material for steel bar connection, consisting of the following materials: 410 parts of cement, 110 parts of admixture, 480 parts of sand, 0.06 parts of water-retaining agent, 1.5 parts of defoaming agent, and 7 parts of composite water-reducing agent parts, 45 parts of composite retarder, 36 parts of composite expansion agent, 9 parts of composite early strength agent, 140 parts of water, in parts by weight.

[0050] Among them, the compounding ratio of cement is: 336.2 parts of 52.5 grade ordinary portland cement, 49.2 parts of 52.5 grade sulphoaluminate cement, and 24.6 parts of 62.5 grade high alumina cement, calculated in parts by weight.

[0051] Among them, the compounding ratio of the admixture is: 44 parts of Class I fly ash, 27.5 parts of active silica fume, superfine brucite powder (d 97 =2um) 38.5 parts, in parts by weight.

[0052] Among them, the compounding ratio of sand is: 96 parts of 20-40 mesh quartz sand, 264 parts of ...

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Abstract

The invention belongs to the field of building materials and particularly discloses a high-fluidity sleeve grouting slurry for rebar connection and a preparation method thereof. The grouting slurry isprepared from the following materials in parts by weight: 390-410 parts of cement, 90-110 parts of admixture, 460-500 parts of sand, 0.05-0.07 part of a water-retaining agent, 1.4-1.6 parts of a de-foaming agent, 6-8 parts of a compound water reducer, 40-50 parts of compound retarder, 35-40 parts of a compound expanding agent, 7-10 parts of a compound early strength agent and 135-145 parts of water. The preparation method for the grouting slurry comprises the steps of proportionally weighting the raw materials and uniformly stirring in a certain stirring manner. The sleeve grouting slurry forrebar connection prepared according to the invention is high in fluidity and can solve the problems of more insufficient initial fluidity or lower surplus initial fluidity and poorer fluidity holdingability than those of standard slurry of the present sleeve grouting slurry for rebar connection in practical engineering application.

Description

technical field [0001] The invention belongs to the field of building materials, and specifically discloses a high-fluidity sleeve grouting material for steel bar connection and a preparation method thereof. Background technique [0002] Reinforcement sleeve grouting connection is a new type of reinforcement connection method produced by the needs of engineering practice and technological development, especially suitable for the field of prefabricated buildings. The steel sleeve grouting connection joint is mainly composed of three parts: ribbed steel bar, sleeve and grouting material. The connection principle is: after the ribbed steel bar is inserted into the sleeve, the non-shrinkage or micro-expansion cement-based grouting material is poured into the sleeve to fill the gap between the sleeve and the steel bar. Therefore, the high-performance grouting material is the key to realize the longitudinal connection, and its performance plays a vital role in ensuring the integr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/70C04B2201/50C04B2201/52C04B7/02C04B14/06C04B14/36C04B18/08C04B18/146C04B18/0445C04B22/085C04B22/147C04B24/122C04B24/383C04B24/42C04B24/06C04B2103/302C04B2103/0068
Inventor 肖超黄俊
Owner 成都宏基建材股份有限公司
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