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Grouting material for prefabricated member reinforcing steel bar connection, and preparation method thereof

A technology for prefabricated components and grouting materials, applied in the field of construction engineering materials, can solve the problems of insufficient consideration of lateral restraint and reciprocation, insufficient safety reserves, poor adaptability, etc., and achieves excellent anti-reciprocating performance, easy construction and flow good effect

Inactive Publication Date: 2015-08-05
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide an expansive early-strength grouting material with high strength, excellent tensile and compressive properties, and excellent performance for reciprocating action, and to ensure that the grouting material has a certain degree of fluidity , to solve the problems of inconvenient construction, poor adaptability, insufficient safety reserves, and insufficient consideration of lateral restraint and reciprocating effects of grouting materials in the prior art

Method used

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  • Grouting material for prefabricated member reinforcing steel bar connection, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In the present embodiment, adopt the following method to make grouting material:

[0038] 1) Preparation of grouting material dry powder:

[0039] Prepare the component raw materials of grouting dry powder according to the following parts by weight: 35 kg of sulphoaluminate cement with a strength grade of not less than 52.5, 7 kg of ordinary Portland cement with a strength grade of not less than 52.5, 45 kg of aggregate, and ettringite expansion agent 1.5kg, calcium chloride early strengthening agent 1.5kg, polycarboxylate superplasticizer 0.5kg, emulsified silicone oil (as defoamer) 0.05kg, fumed silica (as anti-settling agent) 0.05kg.

[0040] Among them, the components of 45kg aggregate are: 9kg of fly ash, 3kg of quartz sand with a particle size of 0.5~1.0mm, 5kg of quartz sand with a particle size of 1.0~2.0mm, and 9kg of quartz sand with a particle size of 2.0~4.0mm , 5kg of hook-shaped steel fibers with a length of 3~8mm and a diameter of 0.5~1mm at the end, 9kg...

Embodiment 2

[0044] In the present embodiment, adopt the following method to make grouting material:

[0045] 1) Preparation of grouting material dry powder:

[0046] Prepare the component raw materials of the grouting material dry powder according to the following parts by weight: 40kg of sulphoaluminate cement with a strength grade of not less than 52.5, 5kg of ordinary Portland cement with a strength grade of not less than 52.5, 50 kg of aggregate, and 2.1 kg of calcium oxide expansion agent kg, calcium chloride early strength agent 2.1kg, polycarboxylate superplasticizer 0.8kg, emulsified silicone oil (as defoamer) 0.15kg, modified bentonite (as anti-settling agent) 0.15kg.

[0047]Among them, the components of 50kg aggregate are: 10kg of fly ash, 4kg of quartz sand with a particle size of 0.5~1.0mm, 6kg of quartz sand with a particle size of 1.0~2.0mm, and 10kg of quartz sand with a particle size of 2.0~4.0mm , 5kg of hook-shaped steel fibers with a length of 3~8mm and a diameter of ...

Embodiment 3

[0051] In the present embodiment, adopt the following method to make grouting material:

[0052] 1) Preparation of grouting material dry powder:

[0053] Prepare the component raw materials of the grouting material dry powder according to the following parts by weight: 40kg of sulphoaluminate cement with a strength grade of not less than 52.5, 5kg of ordinary Portland cement with a strength grade of not less than 52.5, 50 kg of aggregate, and 1.8 kg of calcium oxide expansion agent kg, calcium chloride early strength agent 2.4kg, polycarboxylate superplasticizer 0.6kg, emulsified silicone oil (as defoamer) 0.15kg, modified bentonite (as anti-settling agent) 0.15kg.

[0054] Among them, the components of 50kg aggregate are: 10kg of fly ash, 4kg of quartz sand with a particle size of 0.5~1.0mm, 6kg of quartz sand with a particle size of 1.0~2.0mm, and 10kg of quartz sand with a particle size of 2.0~4.0mm , 5kg of hook-shaped steel fibers with a length of 3~8mm and a diameter of...

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Abstract

The present invention discloses a grouting material for prefabricated member reinforcing steel bar connection. According to the present invention, a plurality of additives are selected to dope and the scientific and rational aggregate screening is performed so as to substantially improves the tensile strength and the swellabitity of the grouting material and significantly improve the pullout resistance and the reciprocating resistance of the prefabricated member bush connection; the selective matching of the cement material is strengthened and the appropriate additives are adopted so as to effectively improve the early strength of the grouting material and ensure the positive increase of the strength; the appropriate proportion of the water reducer is added so as to reduce the water consumption, ensure the fluidity of the grouting material, easily construct, and make the grouting material compact and reliable; and the grouting material of the present invention has characteristics of high strength, good fluidity, excellent reciprocating resistance, no construction season environment limitation, swellabitity suitable for bush connection, and the like, has significant targeting advantage during the connection of the prefabricated member having the bush, and provides the great promotion effect for promotion use of the prefabricated member.

Description

technical field [0001] The invention relates to the technical field of building engineering materials, in particular to a grouting material used for prefabricated component reinforcement connection and a preparation method thereof. Background technique [0002] Because of its convenient construction and stable and reliable quality, prefabricated components are actively exploring the improvement of their performance at home and abroad and are gradually being popularized. However, the reliability of the connection of prefabricated components has always been a key factor affecting the quality of prefabricated structures. How to connect two prefabricated components The steel bars between components make them look like a whole, which has become the difficulty and focus of prefabricated component technology and product promotion. Since the steel bars in prefabricated components are already fixed in the concrete, they cannot rotate freely like conventional steel bars, so they canno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B18/08C04B14/06C04B14/48C04B16/08
CPCY02W30/91
Inventor 杨佑发王旭孙阳磊李帅
Owner CHONGQING UNIV
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