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Grouting material for road reinforcement and preparation method thereof

A grouting material and road technology, which is applied in the field of road reinforcement grouting material and its preparation, can solve the problems of affecting the stability and service life of road structures, reducing the grouting ability of grout, and deteriorating the stability of grout, and achieving controllable setting time. , Good filling and dispersion effect, and the effect of improving compressive strength and tensile strength

Active Publication Date: 2015-10-21
SHANGHAI LIYANG ROAD REINFORCEMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the water-cement ratio of the grout can improve the fluidity of the grout, but the stability of the grout becomes worse, and bleeding and stratification are serious. Under the action of grouting pressure, the grout is more likely to segregate and gather at one end of the grouting pipe, preventing it from penetrating into the sand. In the pores, the groutability of the grout is greatly reduced
As we all know, the water-cement ratio required for hydration of Portland cement does not exceed 0.42. The larger the water-cement ratio, the longer the setting time of the slurry, the lower the strength of the hardened body, and the greater the shrinkage, which will eventually lead to the development of slurry strength. slow, poor durability
Moreover, pouring more water into the subgrade and base course than required for cement hydration will seriously affect the stability and service life of the road structure, and its negative effects are self-evident

Method used

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  • Grouting material for road reinforcement and preparation method thereof
  • Grouting material for road reinforcement and preparation method thereof
  • Grouting material for road reinforcement and preparation method thereof

Examples

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preparation example Construction

[0019] The present invention also provides a preparation method of the above-mentioned grouting material, which includes the following steps: weighing the raw materials of each component according to the predetermined dosage ratio, stirring and mixing evenly to form a dry powder mixture and bagging it for later use; during actual construction, the dry powder Put the mixture in a mixer, add water accounting for 20% to 40% of the total weight of the dry powder, and mix well before grouting. The preferred stirring process is as follows: first stir for 2 minutes after adding water, then stop stirring for 30 seconds and then stir again for 2 minutes, so that the slurry obtained by stirring in this way has better fluidity than the slurry obtained by conventional continuous stirring.

[0020] The high-performance grouting material for road reinforcement provided by the invention is composed of cement, mineral powder, silicon powder, water reducer, early strength agent, expansion agent...

Embodiment 1

[0034]

[0035]

[0036] After the above-mentioned raw materials are blended evenly according to the percentage by weight, they are packed into bags for moisture-proof storage, and when used on site, 35% water of the dry mixture is added and stirred before being used. After being used at high temperature in summer at a certain construction site, the average temperature during construction is 36°C, and the grouting material is easy to construct. On-site sampling analysis shows that the performance of the slurry is good: after adding water and stirring, the fluidity is 25s, and the fluidity within 1.0h is tested every five minutes, and it is kept within 30s, and has good groutability; the slurry The final setting time is 250min, the construction time can be longer and the construction performance is superior. After on-site sampling, put it in a standard mortar laboratory to obtain other properties of the slurry: the slurry does not bleed and separate within 24 hours, the e...

Embodiment 2

[0038]

[0039] After the above-mentioned raw materials are blended evenly according to the weight percentage, they are stored in bags to prevent moisture, and when used on site, 32% water of the dry mixture is added and stirred before being used. After being used at a construction site at low temperature in winter, the average temperature during construction is 5°C, and the grouting material is easy to construct. On-site sampling analysis shows that the performance of the slurry is good: after adding water and stirring, the fluidity is 20s, and the fluidity within 1.5h is tested every five minutes, and it is kept within 30s, and has good groutability; the slurry The final setting time is 360min, which is easy to construct. On-site sampling was placed in a standard mortar laboratory to obtain other properties of the slurry: the slurry did not bleed and separate within 24 hours, the expansion rate was 0 at 28 days, the compressive strength at 1 day was 38.6 MPa, and the compre...

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Abstract

The invention discloses a grouting material used for road reinforcement and a preparation method thereof. The grouting material comprises the following components by weight percent: 30-80% of cement, 15-65% of mineral powder, 2-5% of silica powder, 0.3-1% of water reducer, 0.3-5.5% of early strength agent, 0-10% of expanding agent and 0-5% of thickening agent. The grouting material and the preparation method have the beneficial effects that the pore structure of cement paste is improved by adding two kinds of mineral admixtures including mineral powder and silica powder to cement; the two kinds of mineral admixtures have better filling and dispersing effects on the cement paste and can improve the volume stability and flowing property of the grouting material and improve the operability and later strength of the grouting material; by adding the water reducer and the early strength agent, the paste setting time can be ensured to be controllable and the grout can be ensured to have better flowing property and early strength in the reasonable range of the water cement ratio.

Description

technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to a grouting material for road reinforcement and a preparation method thereof. Background technique [0002] In recent years, in the field of road reinforcement, the grouting method has been widely used in road engineering due to its advantages of convenient construction, technical feasibility, and good social benefits. The grouting materials used for road reinforcement mainly include cement, cement + water glass, cement + fly ash. These grouts are used as grouting materials. In order to achieve better construction performance, these traditional grouting fluids often use relatively large water-cement ratios, often 1:1 or even greater. Increasing the water-cement ratio of the grout can improve the fluidity of the grout, but the stability of the grout is degraded, and bleeding and stratification are serious. Under the action of grouting pressure, the grout is m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
Inventor 季晓丽
Owner SHANGHAI LIYANG ROAD REINFORCEMENT TECH