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Large-flow-state cement-based grouting material for semi-flexible pavement and preparation method of large-flow-state cement-based grouting material

A technology of semi-flexible pavement and grouting material, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. Combine good results

Active Publication Date: 2021-07-20
CHINA CHEM TRANSPORTATION CONSTR GRP NO 4 ENG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the contradiction between fluidity and early strength of cement-based grouting materials for semi-flexible pavements, which cannot meet the requirements of existing road construction, the present invention provides a large-flow cement-based grouting material for semi-flexible pavements. Partial synergy, especially through the use of modified microbeads, on the basis of ensuring the early strength to meet the rapid opening of traffic in municipal road projects, the fluidity of the grouting material is improved, and the difficulty of construction is reduced. It has large fluidity, fast flow rate, High hourly strength, no bleeding and segregation, low cost and small shrinkage, etc.

Method used

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  • Large-flow-state cement-based grouting material for semi-flexible pavement and preparation method of large-flow-state cement-based grouting material
  • Large-flow-state cement-based grouting material for semi-flexible pavement and preparation method of large-flow-state cement-based grouting material
  • Large-flow-state cement-based grouting material for semi-flexible pavement and preparation method of large-flow-state cement-based grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A large fluid cement-based grouting material for semi-flexible pavement, the parts by weight of each component are: 50 parts of rapid hardening sulfoaluminate cement, 25 parts of modified microbeads, 20 parts of fine aggregate, 0.02 parts of early strength agent 0.3 parts of water reducer, 0.08 parts of water retaining agent, 0.1 part of defoamer, 4.5 parts of expansion agent and 30 parts of water.

[0032] The rapid-hardening sulfoaluminate cement is rapid-hardening early-strength sulfoaluminate cement of 42.5 strength grade.

[0033] The fine aggregate is ultrafine quartz sand with a particle size of 100-200 mesh, SiO 2 Content ≥ 96 wt.%.

[0034] Described accelerator is lithium carbonate.

[0035] The water reducer is a powder water reducing polycarboxylate water reducer.

[0036] The water retaining agent is 400 viscosity cellulose ether.

[0037] The defoamer is a polyether modified polysiloxane defoamer.

[0038] The expansion agent is calcium sulfoaluminate...

Embodiment 2

[0046] According to the method of Example 1, the semi-flexible pavement is prepared with a large flow state cement-based grouting material. The difference is that the preparation method of the modified microbeads is: get 85 parts of fly ash microbeads, 5 parts of 2000 molecular weight polyethylene Glycol and 10 parts of sodium lauryl sulfate are fully mixed with a high-speed mixer for 15 minutes at a speed of 2000 r / min. Among them, the particle size of fly ash microbeads is 0.1-5.0 μm.

[0047] According to JTT / 1238-2019 "Cement-based grouting materials for semi-flexible mixtures", the large-flow cement-based grouting materials for semi-flexible pavements prepared in this example were tested, and the results are as follows:

[0048]

[0049] According to the technical indicators of JTG F40-2004 "Technical Specifications for Highway Asphalt Pavement Construction" of the Ministry of Transport, the semi-flexible pavement of this embodiment is poured into the large-void asphal...

Embodiment 3

[0052] According to the method of Example 1, the large-flow cement-based grouting material for semi-flexible pavement is prepared. The difference is that the preparation method of the modified microbeads is: get 90 parts of fly ash microbeads, 3 parts of 1500 molecular weight polyethylene Glycol and 7 parts of sodium dodecyl sulfonate are fully mixed with a high-speed mixer for 15 minutes at a speed of 2500 r / min to obtain the product. Among them, the particle size of fly ash microbeads is 0.1-5.0 μm.

[0053] According to JTT / 1238-2019 "Cement-based grouting materials for semi-flexible mixtures", the large-flow cement-based grouting materials for semi-flexible pavements prepared in this example were tested, and the results are as follows:

[0054]

[0055] According to the technical indicators of JTG F40-2004 "Technical Specifications for Highway Asphalt Pavement Construction" of the Ministry of Transport, the semi-flexible pavement of this embodiment is poured into the la...

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Abstract

The invention discloses a large-flow-state cement-based grouting material for a semi-flexible pavement and a preparation method of the large-flow-state cement-based grouting material. The large-flow-state cement-based grouting material comprises the components in parts by weight: 35-60 parts of quick-hardening sulfoaluminate cement, 15-40 parts of modified microbeads, 10-30 parts of fine aggregate, 0.01-0.3 part of an early strength agent, 0.1-0.5 part of a water reducing agent, 0.05-0.2 part of a water-retaining agent, 0.001-0.1 part of a defoaming agent, 4-5.5 parts of an expanding agent and 20-35 parts of water. Through cooperative matching of the components, on the basis of relatively high hour strength, the performance improvement of high fluidity, high flow velocity and high pouring rate is realized, and the concrete has the advantages of short construction period, no need of vibration, convenience in construction, high cost performance and the like, and meets the requirement of rapid traffic opening in road engineering.

Description

technical field [0001] The invention relates to a large-flow cement-based grouting material for semi-flexible pavements and a preparation method thereof. The large-flow cement-based grouting material for semi-flexible pavements has high early strength and high fluidity, and is filled in porous open-graded asphalt mixture. In the voids of the material, the asphalt pavement material can significantly improve the anti-rutting ability, weather resistance and other properties, and belongs to the technical field of road engineering materials. Background technique [0002] The semi-flexible pavement is a new type of rigid and flexible composite pavement formed by pouring a large-flow cement mortar into the large-pore asphalt mixture. Therefore, the pavement has both the flexibility of the asphalt pavement and the rigidity of the cement concrete pavement. . Semi-flexible pavement materials have been proven to significantly improve the rutting resistance, water damage and weather re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B20/02C04B18/08C04B111/70
CPCC04B28/06C04B20/023C04B18/082C04B2201/50C04B2111/70C04B2111/0075C04B2103/10C04B2103/302C04B2103/465C04B2103/50C04B22/14Y02W30/91
Inventor 段培牟长江程凯杨学帅孙浩牛腾卢晓磊
Owner CHINA CHEM TRANSPORTATION CONSTR GRP NO 4 ENG CO LTD
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