Reinforcing slurry for semi-rigid base and grouting method of reinforcing slurry

A semi-rigid base, grouting technology, applied in buildings, roads, roads, etc., can solve the problems of difficult to grasp the grouting amount, road uplift and uplift, and delay in opening traffic, so as to shorten the traffic closure time and avoid excessive expansion rate. Large, enhance the effect of carrying capacity

Inactive Publication Date: 2014-09-10
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 grouting material are widely used, and there are many related patents. For example, the publication number is CN 102140772, which discloses a "method for controlling road grouting"; Road maintenance grout and its preparation method", but most of the grout involved is ordinary cement grout or polymer grout. Ordinary cement grout has the advantages of long maintenance time, late opening to traffic, and construction in separate lanes. , driving affects health and other shortcomings; compared with cement grouting material, polymer grouting material has higher cost, poor bonding compatibility with base inorganic materials, difficult to control the amount of grouting, too little grouting is not dense enough, Too much grouting will cause the road surface to rise and bulge, which will affect driving safety and comfort

Method used

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  • Reinforcing slurry for semi-rigid base and grouting method of reinforcing slurry
  • Reinforcing slurry for semi-rigid base and grouting method of reinforcing slurry
  • Reinforcing slurry for semi-rigid base and grouting method of reinforcing slurry

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Embodiment 1

[0033] Embodiment 1: Prepare a kind of semi-rigid base layer reinforcement grout of the present invention, take by mass ratio: sulfoaluminate cement 99.6%; Powdered polycarboxylate superplasticizer 0.09%; Boric acid 0.24%; Lithium carbonate 0.04%; Azodicarbonamide 0.03%; no mineral fillers; mix the above raw materials uniformly by mechanical stirring to obtain a semi-rigid base layer reinforcement grout. During on-site construction, use a pulping machine with a rotating speed of 700r / min, and the mass ratio of water to grouting material is 0.3. Add water first and then add slurry. After adding all the powder, stir for 3 minutes to make slurry.

Embodiment 2

[0034] Embodiment 2: prepare a kind of semi-rigid base layer reinforcement grout of the present invention, take by mass ratio: sulfoaluminate cement 95.6%; Powdered polycarboxylate superplasticizer 0.08%; Tartaric acid 0.25%; Lithium hydroxide 0.02% and lithium carbonate 0.02%; plastic expansion agent adopts azodicarbonamide 0.02% and azobisisoheptanonitrile 0.01%; microbead powder 4%; the raw materials of the above ratio are mixed by mechanical stirring A semi-rigid base reinforcement grout is uniformly obtained. During on-site construction, use a pulping machine with a rotating speed of 550r / min, and the mass ratio of water to grouting material is 0.3. Add water first and then add slurry. After adding all the powder, stir for 5 minutes to make a slurry.

Embodiment 3

[0035] Embodiment 3: Prepare a kind of semi-rigid base layer reinforcement grout of the present invention, take by mass ratio: sulfoaluminate cement 96%; Powdered naphthalene series superplasticizer 0.68%; Tartaric acid 0.1% and boric acid 0.15%; Hydrogen 0.01% of lithium oxide and 0.02% of lithium chloride; 0.02% of azobisisobutyronitrile and 0.02% of azobisisoheptanonitrile; 3% of slag powder; the raw materials of the above ratio are mixed uniformly by mechanical stirring to obtain a Semi-rigid base reinforcement grout. During on-site construction, use a pulping machine with a rotational speed of 650r / min, and the mass ratio of water to grouting material is 0.33. Add water first and then inject slurry. After adding all the powder, stir for 3 minutes to make slurry.

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Abstract

The invention relates to reinforcing slurry for a semi-rigid base and a grouting method of the reinforcing slurry. The reinforcing slurry comprises the raw materials by mass percent: 95-99.7% of cement, 0.06-1.0% of water reducer, 0.1-0.3% of retarder, 0.03-0.07% of coagulant, 0.02-0.04% of plastic expanding agent, and 0-4.79% of mineral filler, and the reinforcing slurry is prepared through stirring the raw materials. The grouting method comprises the steps of locating hole sites at 0.25-meter positions of the periphery of a crack in the pitch, and drilling down at the hole sites to the top of a roadbed, wherein the distance between every two holes is 0.75-1.0m; adding water into a stirrer, then adding the slurry, wherein the mass ratio of water to slurry is less than or equal to 0.35, the stirring speed is greater than or equal to 500r / min, and the stirring time is less than or equal to 5 minutes; grouting into a grouting pipe, wherein the grouting pressure is 0.5-1.0MPa, and the time for stirring and grouting is less than or equal to 30 minutes; and after grouting, sealing the grouting holes with sealant or pitch. The reinforcing slurry has the characteristics of low cost, good fluidity, fast speed in condensation and high strength, and the grouting method is simple.

Description

technical field [0001] The invention belongs to road maintenance engineering technology, and relates to a semi-rigid base layer reinforcing grouting material and a grouting method thereof, and further to a semi-rigid base layer grouting material and a grouting method for treating grouting diseases. Background technique [0002] The asphalt pavement structure design of high-grade highways in my country usually consists of a cushion layer, a base layer, a sub-base layer, a lower layer, a middle layer, and an upper layer. Semi-rigid base, as a more common base structure, mainly refers to the base paved with cement, lime, fly ash stabilized aggregates or stabilized soil materials. When water enters the semi-rigid base through the asphalt surface, the traffic load will A huge hydrodynamic pressure will be generated on the surface of the semi-rigid base or inside the soil foundation, so that the surface of the semi-rigid base or the soil will soften and expand, and the silty parts...

Claims

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Application Information

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Patent Type & Authority Applications(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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