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Sleeve grouting material for connecting fiber reinforced steel bars and preparation method thereof

A technology of sleeve grouting and fiber reinforcement, which is applied in the field of building materials, can solve problems such as insufficient strength and toughness of grouting materials, failure of material structure, failure of mechanical structure, etc., and achieve the effect of good volume stability and high toughness in the later stage

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

The above weaknesses are specifically manifested as: when subjected to internal or external concentrated stress, its mechanical structure is prone to instantaneous failure
The reason is that the strength and toughness of the grouting material are not enough. When the concentrated stress is applied, the energy brought by the stress cannot be effectively transmitted in the entire grouting material material, so the energy is mainly concentrated on the surface of the material, and first causes Cracks appear on the surface of the material, and then the cracks extend from the surface to the inside, eventually leading to the overall failure of the material structure

Method used

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  • Sleeve grouting material for connecting fiber reinforced steel bars and preparation method thereof
  • Sleeve grouting material for connecting fiber reinforced steel bars and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A sleeve grouting material for fiber-reinforced steel bar connection, consisting of the following materials: 400 parts of cement, 100 parts of admixture, 480 parts of sand, 1.5 parts of defoamer, 7 parts of composite water reducer, and 45 parts of composite retarder , 36 parts of composite expansion agent, 9 parts of composite early strength agent, 6.5 parts of composite fiber, 140 parts of water, in parts by weight.

[0028] 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.

[0029] 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.

[0030] Among them, the compounding ratio of sand is: 96 parts of 20-40 mesh quartz sand, 264 parts of 40-70 mesh dry sand, 120 parts of...

Embodiment 2

[0039] A sleeve grouting material for fiber-reinforced steel bar connection, consisting of the following materials: 395 parts of cement, 95 parts of admixture, 480 parts of sand, 1.5 parts of defoamer, 7 parts of composite water reducer, and 45 parts of composite retarder , 36 parts of composite expansion agent, 9 parts of composite early strength agent, 6.5 parts of composite fiber, 140 parts of water, in parts by weight.

[0040] Among them, the compounding ratio of cement is: 323.9 parts of 52.5 grade ordinary Portland cement, 47.4 parts of 52.5 grade sulphoaluminate cement, and 23.7 parts of 62.5 grade high alumina cement, calculated in parts by weight.

[0041] Among them, the compounding ratio of the admixture is: 38 parts of Class I fly ash, 23.75 parts of active silica fume, superfine brucite powder (d 97 =2um) 33.25 parts, in parts by weight.

[0042] Among them, the compounding ratio of sand is: 96 parts of 20-40 mesh quartz sand, 264 parts of 40-70 mesh dry sand, 1...

Embodiment 3

[0051] A sleeve grout for fiber-reinforced steel bar connections, consisting of the following materials: 410 parts of cement, 110 parts of admixtures, 480 parts of sand, 1.5 parts of defoaming agent, 7 parts of composite water reducer, and 45 parts of composite retarder , 36 parts of composite expansion agent, 9 parts of composite early strength agent, 6.5 parts of composite fiber, 140 parts of water, in parts by weight.

[0052] 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.

[0053] 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.

[0054] Among them, the compounding ratio of sand is: 96 parts of 20-40 mesh quartz sand, 264 parts of 40-70 mesh dry sand, 120 p...

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Abstract

The invention belongs to the field of construction materials, and particularly discloses a sleeve grouting material for connecting fiber reinforced steel bars. The sleeve grouting material is preparedfrom the following materials in parts by weight: 390-410 parts of cement, 90-110 parts of a doping material, 460-500 parts of sands, 1.4-1.6 parts of a defoaming agent, 6-8 parts of a composite waterreducer, 40-50 parts of a composite retarder, 35-40 parts of a composite swelling agent, 7-10 parts of a composite early strength agent, 6-8 parts of composite fibers and 135-145 parts of water. According to the sleeve grouting material for connecting fiber reinforced steel bars and the preparation method thereof, the performance indexes of the grouting material accord with specification requirements, the composite fiber can effectively achieve the effects of reinforcement, toughening and preventing crack extension in comparison with the sleeve grouting material for connecting steel bars without fiber reinforcement, and the rupture strength, tensile strength and structural stability of the grouting material can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of building materials, and specifically discloses a sleeve grouting material for connecting fiber-reinforced steel bars 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 in...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/70C04B2201/50C04B2201/52C04B7/02C04B14/36C04B18/08C04B18/146C04B14/06C04B24/42C04B2103/302C04B24/06C04B18/0445C04B22/085C04B22/147C04B24/122C04B14/4643C04B14/38C04B14/48C04B2103/0068
Inventor 肖超黄俊张皓玉
Owner 成都宏基建材股份有限公司
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