Grouting material for low-temperature steel bar sleeve connection and preparation method and application thereof

A technology of sleeve connection and low-temperature steel bar, which is applied in the field of building materials, can solve the problems of unsatisfactory, high energy consumption, insufficient grouting material strength, fluidity and durability, etc., and achieve good fluidity, good strength and expansion rate, Excellent construction effect

Active Publication Date: 2020-04-03
BEIJING MUNICIPAL ENG RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many difficulties in increasing the curing temperature of grouting materials by heat storage or external heat source heating, and the energy consumption is high. In addition, grouting materials generally have the disadvantages of insufficient strength, fluidity and durability under low temperature conditions, and cannot meet the conditions of low ambient temperature. Next, complex building construction needs

Method used

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  • Grouting material for low-temperature steel bar sleeve connection and preparation method and application thereof
  • Grouting material for low-temperature steel bar sleeve connection and preparation method and application thereof
  • Grouting material for low-temperature steel bar sleeve connection and preparation method and application thereof

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preparation example Construction

[0058] The present invention also provides the preparation method of the grouting material for low-temperature steel bar sleeve connection described in the above technical solution, comprising the following steps:

[0059] The gel material, aggregate, mineral admixture, water reducing agent, defoaming agent, early strength agent, retarder, plastic expansion agent and antifreeze agent are mixed to obtain the grouting material for low temperature steel bar sleeve connection.

[0060] In the present invention, the components in the preparation method are the same as the components in the grouting material for low-temperature steel bar sleeve connection described in the above technical solution, and will not be repeated here.

[0061] The present invention does not specifically limit the mixing, and the mixing well known to those skilled in the art can be used. In the present invention, the mixing device is preferably a mixer, more preferably a mechanical power grouting mixer or a...

Embodiment 1～2

[0072] The reagents used in Examples 1-2 are all commercially available.

[0073] Mix gel material, aggregate, mineral admixture, water reducer, defoamer, early strength agent, retarder, plastic expansion agent and antifreeze at -5°C to obtain the low temperature steel sleeve The grouting material for connection, wherein the gel material is 52.5 grade Portland cement, sulfoaluminate cement and high belite cement mixed in a mass ratio of 1:1:1; the aggregate is river sand, and the The mass ratio of coarse river sand with particle size of 20-40 mesh and fine river sand with particle size larger than 40 mesh and less than or equal to 70 mesh is 3:1; Glass microbeads with a wall thickness of 1.2-1.8 μm are obtained by mixing according to a mass ratio of 1:1; the water reducing agent is a polycarboxylate water reducing agent; the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol; the early strength agent is calcium formate; antifreeze is sodium nitrate; retarder ...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to a grouting material for low-temperature steel bar sleeve connection and a preparation method and application thereof. The grouting material comprises the following components in parts by mass: 100 parts of a gel material, 100 parts of aggregate, 22 to 25 parts of a mineral admixture, 0.5 to 0.8 parts ofa water reducing agent, 0.08 to 0.12 part of a defoaming agent, 0.05 to 0.08 parts of an early strength agent, 0.02 to 0.04 parts of a retarder, 0.03 to 0.05 parts of a plastic expanding agent and 0.05-0.15 parts of an antifreezing agent. Experimental results show that the grouting material for low-temperature steel bar sleeve connection is suitable for a construction environment at -5 DEG C to 10 DEG C, the fluidity reaches 330 mm, after construction and curing, the compressive strength reaches 96.5 MPa, the vertical expansion rate reaches 0.08% after 3 hours, and the strength and the expansion rate are good.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a grouting material for low-temperature reinforcement sleeve connection, a preparation method and application thereof. Background technique [0002] The grouting material for steel sleeve connection is made of high-strength materials as aggregate, cement as binder, and supplemented with high fluidity, micro-expansion, anti-segregation and other substances. Add a certain amount of water at the construction site and mix evenly and then ready to use. When prefabricated concrete components are connected by steel sleeve grouting, the early strength and expansion rate of the grout for steel sleeve connection fundamentally affect the construction quality and construction period. [0003] Compared with concrete engineering, the thickness of the grouting material in the sleeve is less than 10mm, and the volume is less than 0.2L. It is basically impossible to ensure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/70
CPCC04B28/06C04B2111/70C04B7/02C04B14/06C04B18/08C04B14/22C04B2103/302C04B24/10C04B24/06C04B24/32C04B24/04C04B22/085C04B2103/0068
Inventor 夏春蕾李世元杨思忠任成传张印川赵志刚
Owner BEIJING MUNICIPAL ENG RES INST
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