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Duct grouting slurry with low water-binder ratio and preparation method thereof

A technology for grouting and grouting of ducts, applied in the field of grouting and its preparation, can solve the problems of cement instability affecting project quality, difficulty in meeting standard requirements, affecting construction period, etc., and achieving filling degree and volume stability. Good, the effect of improving the strength guarantee rate and reducing labor costs

Active Publication Date: 2012-07-25
湖北恒利建材科技有限公司
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  • Application Information

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Problems solved by technology

After the implementation of the new standard, it is difficult for many traditional grouting agents to be mixed with on-site cement to meet the standard requirements, and the instability of cement seriously affects the quality of the project
In addition, some cast-in-place beam projects have a tight construction period due to various reasons, and it takes almost seven days for ordinary grouting materials to reach the design strength, and even longer in winter, which affects the construction period

Method used

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  • Duct grouting slurry with low water-binder ratio and preparation method thereof
  • Duct grouting slurry with low water-binder ratio and preparation method thereof
  • Duct grouting slurry with low water-binder ratio and preparation method thereof

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preparation example Construction

[0024] According to CN201110433678.5, the preparation method of the high-performance water reducer HL-8010 includes the following steps:

[0025] (1) Add deionized water to the reactor, then add 63 to 82 parts by weight, preferably 70 to 80 parts by weight of ether macromers, prepare it into a solution of 55 to 65% by weight, and heat up to 50 to 80 °C, preferably 60-70 °C, generally 60 °C to completely dissolve;

[0026] (2) After the materials in the reactor are all dissolved, add 2 to 10% of the total monomer weight in the reactor, preferably 4 to 6% aqueous peroxide solution, and the aqueous peroxide solution has a concentration of 2%. hydrogen peroxide;

[0027] (3) 6 to 15 parts by weight, preferably 9 to 11 parts by weight of small molecule monomers and chain transfer agents are formulated with deionized water to form a solution of 20 to 30% by weight as material A, wherein the chain transfer agent is the small molecule 3 to 5% of the weight of molecular monomers;

...

Embodiment 1

[0048] Embodiment 1 (common type tunnel pressure slurry)

[0049] The parts by weight of each component are as follows:

[0050]

[0051]

Embodiment 2

[0052] Embodiment 2 (plastic-preserving type channel pressure slurry)

[0053] The parts by weight of each component are as follows:

[0054]

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Abstract

The invention provides a duct grouting slurry with low water-binder ratio for a post-tensioned prestressed concrete beam. At the construction site, the duct grouting slurry only needs to be mixed with water uniformly according to the ratio so as to be used for duct grouting. The duct grouting slurry comprises a cementing material, a plasticizing agent, an expanding agent, a water-retaining agent, a stabilizing agent, a retarder, a steel bar corrosion inhibitor and an early strength agent. The duct grouting slurry has the advantages that the water-binder ratio is small (0.26-0.32), the flowability is good and is only 10-22 seconds, the early strength is high (reaching up to 20MPa in 3h), slurry cannot be layered or cannot weep water, and only expands slightly, is good in filling extent and volume stability, convenient in site operation and is particularly suitable for construction in winter and suitable for the project which needs to be completed in shorter time.

Description

technical field [0001] The invention relates to a tunnel press grout and a preparation method thereof. The tunnel press grout is mainly used for tunnel press grouting of post-tensioned prestressed concrete beams, and is especially suitable for construction in winter. Background technique [0002] With the rapid development of my country's economy, infrastructure construction has entered a period of rapid development, and expressways have spread to almost every administrative county and city. The quality of the project is directly related to the safety of people's lives and properties. The main function of pipeline grouting is to protect the prestressed steel bar from being exposed to corrosion, to make the prestressed steel bar and the concrete beam have good adhesion, to ensure the effective transmission of prestressed force, and to eliminate or alleviate the repeated load of the prestressed concrete structure. Fatigue damage of anchorage caused by stress change. In order...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04C04B28/06
Inventor 周晓波魏运权魏运超胡从文王国亮
Owner 湖北恒利建材科技有限公司
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