A semi-rigid base reinforcement grouting material and grouting method thereof

A technology of semi-rigid base and grouting material, which is applied in the direction of buildings, roads, roads, etc. It can solve the problems of difficult to grasp the amount of grouting, less amount of grouting, and uplift of the road surface, so as to shorten the traffic closure time and avoid the expansion rate Excessively large, the effect of enhancing the carrying capacity

Inactive Publication Date: 2016-06-29
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The grouting method and the grouting material are widely used, and there are many related patents. For example, the publication number is CN102140772, which discloses a "method for controlling road grouting"; Grouting material and its preparation method", but most of the grouting materials involved are ordinary cement grouting materials or polymer grouting materials. Ordinary cement grouting materials have the advantages of long curing time, late opening to traffic, and difficult traffic when driving in separate lanes. Disadvantages such as affecting health; Compared with cement grouting materials, polymer grouting materials have higher cost, poor bonding compatibility with base inorganic materials, difficult to control the amount of grouting, too little grouting is not dense enough, grouting Excessive volume will cause the road surface to rise and bulge, affecting driving safety and comfort

Method used

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  • A semi-rigid base reinforcement grouting material and grouting method thereof
  • A semi-rigid base reinforcement grouting material and grouting method thereof
  • A semi-rigid base reinforcement grouting material and grouting method thereof

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Embodiment 1

[0033] Example 1: Preparation of a semi-rigid base reinforcement grouting slurry of the present invention, and weighed according to the mass ratio: sulfoaluminate cement 99.6%; powder polycarboxylate water reducing agent 0.09%; boric acid 0.24%; lithium carbonate 0.04%; Azodicarbonamide 0.03%; no mineral filler is added; the above-mentioned raw materials are uniformly mixed by a method of mechanical stirring to obtain a semi-rigid base-layer reinforcement grouting slurry. During on-site construction, a pulper with a rotating speed of 700r / min was used, and the mass ratio of water to slurry was 0.3. Water was added first and then the slurry was added. After all the powder was added, the slurry was stirred for 3 minutes.

Embodiment 2

[0034] Example 2: Preparation of a semi-rigid base reinforcement grouting slurry of the present invention, weighed by mass ratio: sulfoaluminate cement 95.6%; powder polycarboxylate water reducing agent 0.08%; tartaric acid 0.25%; Lithium hydroxide 0.02% and lithium carbonate 0.02%; azodicarbonamide 0.02% and azobisisoheptanenitrile 0.01% as plastic expansion agent; microbead powder 4%; the raw materials in the above proportions are mixed by mechanical stirring A semi-rigid base reinforcement grouting material is uniformly obtained. During on-site construction, a pulping machine with a rotating speed of 550r / min was used, and the mass ratio of water to slurry was 0.3. Water was added first and then the slurry was added. After all the powder was added, the slurry was stirred for 5 minutes.

Embodiment 3

[0035] Example 3: Preparation of a semi-rigid base reinforcement grouting material of the present invention, and weighed by mass ratio: sulfoaluminate cement 96%; powder naphthalene-based superplasticizer 0.68%; tartaric acid 0.1% and boric acid 0.15%; hydrogen Lithium oxide 0.01% and lithium chloride 0.02%; azobisisobutyronitrile 0.02% and azobisisoheptanenitrile 0.02%; slag powder 3%; the above-mentioned raw materials are mixed uniformly by mechanical stirring to obtain a Semi-rigid base reinforcement grouting. During on-site construction, a pulping machine with a rotating speed of 650 r / min was used, and the mass ratio of water to slurry was 0.33. Water was added first and then the slurry was added. After all the powder was added, the slurry was prepared by stirring for 3 minutes.

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Abstract

The invention relates to a semi-rigid base reinforcement grouting slurry and a grouting method thereof. The raw materials according to mass percentage are: cement 95-99.7, water reducing agent 0.06-1.0, retarder 0.1-0.3, accelerator 0.03-0.07, plastic Expansion agent 0.02~0.04, mineral filler 0~4.79, obtained by stirring. The grouting method is: firstly locate the hole position 0.25 meters around the grouting crack, the hole distance is 0.75-1.0 meters, and drill down from the hole to the top of the roadbed; first add water in the mixer and then add the slurry, the quality of the water and the grouting slurry Ratio ≤ 0.35, stirring speed ≥ 500r / min, stirring time ≤ 5min; lower grouting pipe, grouting pressure 0.5-1.0MPa, the time from slurry stirring to grouting is ≤ 30min; sealant or asphalt is used after grouting. Plug the grouting hole. The invention has the characteristics of low cost of grouting, good fluidity, fast setting and high strength, simple construction of grouting method and the like.

Description

technical field [0001] The invention belongs to the road maintenance engineering technology, relates to a semi-rigid base layer reinforcement grouting slurry and a grouting method, and furthermore relates to a semi-rigid base grouting slurry for treating pumping diseases and a grouting method. Background technique [0002] The structural design of asphalt pavement for high-grade highways in my country is usually composed of cushion, base, subbase, lower, middle and upper layers. As a common base structure, semi-rigid base layer mainly refers to the base layer paved with cement, lime, fly ash stabilized aggregate or stabilized soil materials. When the water enters the semi-rigid base layer through the asphalt surface layer, the driving load A great hydrodynamic pressure will be generated on the surface of the semi-rigid base or inside the soil, so that the surface of the semi-rigid base or the soil will soften and expand, and the silty parts of the base surface such as cement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B28/06E01C3/04
Inventor 许亮侯书恩靳洪允刘敏
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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