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Grouting material for expressway bridge bearings and preparation method thereof

A technology for bridge bearings and expressways, which is applied in the field of grouting materials for expressway bridge bearings and its preparation, can solve problems such as prolonging the equipment turnover period, poor connection of bearings, and affecting construction quality, so as to improve mechanical properties and Durability, reduce tamping time, overcome the effect of mortar unevenness

Pending Publication Date: 2018-12-04
石家庄国辰知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing domestic grouting materials have disadvantages such as poor fluidity, short construction time, and slow strength development.
[0003] The fluidity of traditional grouting materials is easy to lose, and the strength develops slowly. It usually requires more than 7 days of maintenance, which prolongs the equipment turnover period and affects the construction progress; and because the volume shrinks during the hydration process of the grouting material, it is easy to cause the support to be not tightly connected after installation. , affecting the construction quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A grouting material for expressway bridge bearings, the grouting material comprises the following components:

[0030] Cement, quartz sand, fly ash, water reducer, coagulant, expansion agent, retarder, defoamer, thickener, polypropylene mesh fiber.

[0031] The grout comprises the following components in parts by weight:

[0032] 400 parts of cement, 300 parts of quartz sand, 10 parts of fly ash, 2 parts of water reducer, 1 part of coagulation accelerator, 1 part of expansion agent, 1 part of retarder, 2 parts of defoamer, 2 parts of thickener, 1 part polypropylene mesh fiber;

[0033] Belonging to the cement includes the following components in weight percent:

[0034] 63% of sulphoaluminate cement, 11% of ordinary Portland cement, 0.4% of anti-cracking fiber, 17% of filler, 0.2% of early strength agent; the compressive strength of the cement is ≥ 34Mpa, and the early strength agent is triethanolamine , calcium chloride, potassium nitrate, and a mixture of one or mo...

Embodiment 2

[0043] A grouting material for expressway bridge bearings, the grouting material comprises the following components:

[0044] Cement, quartz sand, fly ash, water reducer, coagulant, expansion agent, retarder, defoamer, thickener, polypropylene mesh fiber.

[0045] The grout comprises the following components in parts by weight:

[0046] 420 parts of cement, 350 parts of quartz sand, 12 parts of fly ash, 2.5 parts of water reducer, 1.1 parts of coagulation accelerator, 1.5 parts of expansion agent, 1.5 parts of retarder, 2.2 parts of defoamer, 2.5 parts of thickener, 1.1 parts of polypropylene mesh fiber;

[0047] Belonging to the cement includes the following components in weight percent:

[0048] 64% of sulphoaluminate cement, 12% of ordinary Portland cement, 0.5% of anti-cracking fiber, 18% of filler, 0.3% of early strength agent; the compressive strength of the cement is ≥ 34Mpa, and the early strength agent is three One or more mixtures of ethanolamine, calcium chloride...

Embodiment 3

[0057] A grouting material for expressway bridge bearings, the grouting material comprises the following components:

[0058] Cement, quartz sand, fly ash, water reducer, coagulant, expansion agent, retarder, defoamer, thickener, polypropylene mesh fiber.

[0059] The grout comprises the following components in parts by weight:

[0060] 450 parts of cement, 380 parts of quartz sand, 150 parts of fly ash, 3 parts of water reducer, 1.2 parts of coagulation accelerator, 2.5 parts of expansion agent, 2 parts of retarder, 2.5 parts of defoamer, 3 parts of thickener, 1.3 parts of polypropylene mesh fiber;

[0061] Belonging to the cement includes the following components in weight percent:

[0062] 65% of sulphoaluminate cement, 13% of ordinary Portland cement, 0.6% of anti-cracking fiber, 19% of filler, 0.35% of early strength agent; the compressive strength of the cement is ≥ 34Mpa, and the early strength agent is three One or more mixtures of ethanolamine, calcium chloride, po...

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Abstract

The invention discloses a grouting material for expressway bridge bearings, which comprises the following components in parts by weight: 400-500 parts of cement, 300-450 parts of quartz sand, 10-20 parts of fly ash, 2-4 parts of a water reducing agent, 1-1.5 parts of a coagulation accelerator, 1-4 parts of an expander, 1-3 parts of a retarder, 2-3 parts of a defoamer, 2-5 parts of a thickener, and1-1.5 parts of polypropylene reticular fibers. The invention further discloses a preparation method of the grouting material for expressway bridge bearings. The cement uses in the grouting material adopts sulphoaluminate cement and ordinary portland cement, which not only realizes the characteristics of early strength, but also avoids the problem of strength substantial decline caused by the useof the ordinary portland cement alone. The raw materials of the grouting material have a wide range of sources and low price. The preparation method is simple, and suitable for large-scale promotion,and the grouting material has good construction performance, can realize self-flow leveling, has long operation time, and has a smooth surface after being poured, and the shortcomings of traditional mortar such as irregularity, easy cracking, easy stripping and easy dusting can be overcome.

Description

technical field [0001] The invention relates to the technical field of expressway construction, in particular to a grouting material for expressway bridge bearings and a preparation method thereof. Background technique [0002] In recent years, the infrastructure is in a period of high-speed construction. During the construction of expressway bridges, the installation of a large number of prefabricated simply supported box girders and pot rubber bearings of cast-in-place girders is involved. Grouting is used to support and fix. In heavy machinery and other industries, when it comes to the installation and repair of large-scale equipment foundation supports, it is also necessary to grout the anchor bolts of the equipment foundation so that the equipment can run as soon as possible and production can continue. Therefore, how to quickly install and ensure high-quality installation or repair of bearings often becomes the key to controlling the construction progress and improving...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B111/70
CPCC04B28/06C04B2111/70C04B7/02C04B14/06C04B18/08C04B2103/302C04B2103/12C04B2103/0068C04B2103/22C04B2103/50C04B2103/44C04B16/0633C04B14/00
Inventor 王爱爽李明阳孟祥文
Owner 石家庄国辰知识产权服务有限公司
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