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Corrosion-inhibiting sleeve grout material for rebar splicing and manufacturing method thereof

A sleeve grouting and functional technology, applied in the field of building materials, can solve the problems of reducing the connection strength of grouting material and steel bars, affecting the stability of building connection units, and adverse effects on the overall structural system, achieving excellent rust resistance and prolonging service life. , The effect of delaying rust

Inactive Publication Date: 2018-12-18
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

In the steel bar sleeve grouting connection technology, the sleeve grouting material for steel bar connection exists in the form of directly covering the surface of the ribbed steel bar, and is in direct contact with the steel bar surface for a long time. If the steel bar is corroded, it will not only reduce the mechanical properties of the steel bar itself It will also reduce the connection strength between the grouting material and the steel bar, which will affect the stability between two or more building connection units, and even have a negative impact on the overall structural system

Method used

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  • Corrosion-inhibiting sleeve grout material for rebar splicing and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A sleeve grouting material for steel bar connection with antirust function, which is composed of the following materials: 400 parts of cement, 100 parts of admixture, 480 parts of sand, 1.5 parts of defoaming agent, 19 parts of rust inhibitor, and composite water reducer 7 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.

[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, ...

Embodiment 2

[0039] A sleeve grouting material for steel bar connection with antirust function, which is composed of the following materials: 395 parts of cement, 95 parts of admixture, 480 parts of sand, 1.5 parts of defoaming agent, 19 parts of rust inhibitor, and composite water reducer 7 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.

[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 me...

Embodiment 3

[0051] A sleeve grouting material for steel bar connection with antirust function, which is composed of the following materials: 410 parts of cement, 110 parts of admixture, 480 parts of sand, 1.5 parts of defoaming agent, 19 parts of rust inhibitor, and composite water reducer 7 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.

[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 mes...

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Abstract

The invention belongs to the field of building materials and discloses a corrosion-inhibiting sleeve grout material for rebar splicing. The grout material includes, by weight, 390-410 parts of cement,90-110 parts of an admixture, 460-500 parts of sand, 1.4-1.6 parts of a defoamer, 15-20 parts of a corrosion inhibitor, 6-8 parts of a composite water reducing agent, 40-50 parts of a composite retarder, 35-40 parts of a composite expanding agent, 7-10 parts of a composite early strength agent and 135-145 parts of water. A manufacturing method of the grout material includes weighing the componentmaterials according to the ratio and fully stirring the materials according to a certain stirring manner. The composition of the grout material is optimized according to a high amount of experiment data. The prepared grout material has good fluidity, compressive strength, vertical expansivity and corrosion inhibiting performance. The corrosion inhibiting performance of the grout material is obviously better than that of common commercially available sleeve grout materials for rebar splicing.

Description

technical field [0001] The invention belongs to the field of building materials, and specifically discloses a sleeve grouting material for steel bar connection with antirust function 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/70C04B2201/50C04B2201/52C04B7/02C04B18/08C04B18/146C04B22/066C04B14/06C04B24/42C04B2103/61C04B2103/302C04B2103/22C04B2103/0068C04B2103/12C04B22/002
Inventor 肖超黄俊
Owner 成都宏基建材股份有限公司
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