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Special high strength grouting material for connecting reinforcement sleeve

A technology for steel bar sleeves and grouting materials, which is applied in the field of high-strength grouting materials for steel bar sleeve connections, which can solve problems such as insufficient performance, and achieve the effects of large fluidity loss, good retarding effect, and firm connection

Inactive Publication Date: 2016-01-13
SHANGHAI URBAN CONSTR MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is to provide a special high-strength grouting material for steel bar sleeve connection to meet the technical requirements of large-diameter steel bar connection in prefabricated components.

Method used

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  • Special high strength grouting material for connecting reinforcement sleeve
  • Special high strength grouting material for connecting reinforcement sleeve
  • Special high strength grouting material for connecting reinforcement sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The formula of special high-strength grouting material for steel bar sleeve connection of this embodiment is shown in Table 1

[0046] Table 1

[0047] raw material

1t production ratio / kg

Sulphoaluminate cement

45

PII52.5

412

Quartz sand

529

Superplasticizer

2

Methyl cellulose ether 500 viscosity

0.2

Latex powder (vinyl acetate-ethylene copolymerization, Tg=15°C, film-forming temperature 4°C)

1

Analytical pure tartaric acid L+

0.38

sodium gluconate

0.02

Defoamer

0.6

Composite expansion agent

10

water

124

[0048] The special high-strength grouting material for the sleeve connection of steel bars in this embodiment is used for the steel bar connection of large sleeves of bridges, wherein the sleeve length is 800 mm, the diameter is 60 mm, and the diameter of the built-in steel bar is 40 mm.

[0049] The special high-strength grout ...

Embodiment 2

[0054] The formula of special high-strength grouting compound for the connection of steel bar sleeve of this embodiment is shown in Table 3,

[0055] table 3

[0056]

[0057]The special high-strength grouting material for steel bar sleeve connection in this embodiment is used for steel bar sleeve connection in the construction of PC components in a certain substation in Shanghai.

[0058] The special high-strength grout for steel bar sleeve connection in this embodiment is tested according to JGT408-2013 sleeve grout for steel bar connection, and the test results are shown in Table 4.

[0059] Table 4

[0060]

[0061] For the preparation method of the above embodiment, refer to a high-performance grouting material for prefabricated building construction disclosed in CN103265253A and its preparation method.

Embodiment 3

[0063] The special high-strength grouting material formula for the connection of the reinforcement sleeve of this embodiment is shown in Table 5,

[0064] table 5

[0065] raw material

1t production ratio / kg

Shuanghe Sulphoaluminate Cement

23

Onoda PII52.5

433

Quartz sand

529

Superplasticizer

3

Methyl cellulose ether 500 viscosity

0.2

latex powder

1

Analytical pure tartaric acid L+

0.34

sodium gluconate

0.03

Defoamer

0.6

Composite expansion agent

10

water

122

[0066] The special high-strength grouting material for steel bar sleeve connection in this embodiment is used for steel bar sleeve connection in PC component construction. The sleeve length is 380 mm, the inner diameter is 45 mm, and the built-in steel bar diameter is 32 mm.

[0067] The special high-strength grout for steel bar sleeve connection in this embodiment is tested accor...

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Abstract

The present invention discloses a special high strength grouting material for connecting a reinforcement sleeve. The special high strength grouting material for connecting the reinforcement sleeve comprises grouting material powder and water, wherein the grouting material powder is prepared from the following raw materials in percentage by weight: 45% to 50% of cement, 0.1% to 0.3% of a water reducing agent, 0.06% to 0.1% of a defoamer, 1% to 3% of a water retention tackifier, 0.025% to 0.05% of a composite retarder, 1% to 2% of a composite expansion agent; and and the balance of quartz sand, totalling 100, wherein the mass ratio of the grouting material powder to the water is 1 to (0.23-0.28). The special high strength grouting material for the connecting reinforcement sleeve provided by the present invention has the characteristics of high strength, high adhesion and slight expansion with no shrinkage; the high strength grouting material can be poured into the reinforcement sleeve to enable fixed connection formed between reinforcements and between the reinforcements and the sleeve, and has excellent durability.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a special high-strength grouting material for steel bar sleeve connection. Background technique [0002] In recent years, prefabricated concrete structures (referred to as PC structures) have developed to a certain extent in my country. Most of the components of PC structures are prefabricated in factories and assembled on site. Compared with cast-in-place concrete structures, they are improving the construction quality At the same time, it can save resources and energy, reduce pollution and carbon emissions, and reduce on-site construction personnel, etc., and has broad development prospects in the future urban construction field. [0003] The performance and quality of prefabricated component reinforcement connections are an important guarantee for the integrity and safety of building structures. One of the main categories of PC structures - the complete set of tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/06C04B111/70
Inventor 覃爽徐亚玲朱永明黄晖皓
Owner SHANGHAI URBAN CONSTR MATERIAL CO LTD
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