Cement concrete pavement rapid repair material and preparation method thereof

A technology for cement concrete and repairing materials, applied in the field of materials, can solve the problems of repairing material road surface not being able to restore traffic in time, poor bonding performance of old and new materials, and reduced strength, etc.

Active Publication Date: 2021-04-30
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the research on cement-based pavement materials at home and abroad has been relatively mature, but there are many problems. Ordinary Portland cement-based pavement repair materials are easy to construct, but the early compressive strength is low, the setting time is long, and hardening is slow. New and old materials The bonding performance is poor, and the pavement of repair materials cannot be restored to traffic in time, while the new and old materials of special cement pavement repair materials have good adhesion, fast setting and hardening, and high early compressive strength, but they face the problem of reduced strength in the later stage, and their manufacturing costs Too high, not suitable for large-scale promotion and repair, not widely used

Method used

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  • Cement concrete pavement rapid repair material and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0041] Put 0.07 parts of modified carbon nanofibers, 0.06 parts of dispersant and 9 parts of water in 17 parts of composite alkali activator solution, stir for 240s, and then put it under the power of 900W for 50min to obtain a uniform mixed solution; then weigh 50 parts of fly ash, 14 parts of granulated blast furnace slag, 6 parts of red mud, 3 parts of rice husk ash, and 0.1 part of co-solvent were poured into the stirring pot and stirred for 90 seconds to obtain the mixture; then the uniform mixed solution obtained above was added to The mixture was stirred for 90 seconds to obtain a geopolymer slurry, and finally 1 part of silane coupling agent was added thereto, stirred for 180 seconds, then poured, vibrated, and cured under natural conditions to obtain the rapid road surface repair material.

Embodiment 2

[0045] Put 0.06 parts of modified carbon nanofibers, 0.05 parts of dispersant and 9 parts of water in 17 parts of composite alkali activator solution, stir for 240s, and then put it under the power of 900W for 60min to obtain a uniform mixed solution; then weigh 54 parts of fly ash, 10 parts of granulated blast furnace slag, 6 parts of red mud, 3 parts of rice husk ash, and 0.2 parts of co-solvent were poured into the stirring pot, and stirred for 120s to obtain the mixture; then the uniform mixed solution obtained above was added to The mixture was stirred for 90 seconds to obtain a geopolymer slurry, and finally 1 part of silane coupling agent was added thereto, stirred for 180 seconds, then poured, vibrated, and cured under natural conditions to obtain the rapid road surface repair material.

Embodiment 3

[0047]Put 0.06 parts of modified carbon nanofibers, 0.05 parts of dispersant and 9 parts of water in 20 parts of composite alkali activator solution, stir for 240s, and then put it under the power of 1000W for 55min to obtain a uniform mixed solution; then weigh 52 parts of fly ash, 9 parts of granulated blast furnace slag, 6 parts of red mud, 3 parts of rice husk ash, and 0.1 part of co-solvent were poured into the stirring pot, and stirred for 120s to obtain the mixture; then the uniform mixed solution obtained above was added to The mixture was stirred for 90 seconds to obtain a geopolymer slurry, and finally 1 part of silane coupling agent was added thereto, stirred for 240 seconds, then poured, vibrated, and cured under natural conditions to obtain the rapid pavement repair material.

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Abstract

The invention discloses a cement concrete pavement rapid repair material and a preparation method thereof. The cement concrete pavement rapid repair material comprises the following components in parts by weight: 50-60 parts of fly ash, 8-18 parts of granulated blast furnace slag, 6-8 parts of red mud, 3-6 parts of rice hull ash, 15-30 parts of a composite alkali activator, 9-12 parts of water, 1-3 parts of a silane coupling agent, 0.05-0.06 part of a dispersing agent, 0.1-0.3 part of a cosolvent and 0.06-0.08 part of modified carbon nanofibers. The concrete pavement rapid repair material provided by the invention has good anti-cracking performance, and the silane coupling agent forms a hydrophobic layer in capillary pores and micro-cracks due to excellent hydrophobicity, so that water is prevented from entering; the structure of the geopolymer is improved from the inside of the geopolymer by fully utilizing the filling effect, the volcanic ash effect and the nano nucleation effect of the modified carbon nanofibers, communicating holes are greatly reduced, the pore structure is optimized, the porosity is reduced, and the compressive strength is improved; by adding the slag and other raw materials, the normal-temperature preparation of the pavement repair material is realized, and the initial setting time and final setting time are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a cement concrete pavement rapid repair material and a preparation method thereof. Background technique [0002] At present, the research on cement-based pavement materials at home and abroad has been relatively mature, but there are many problems. Ordinary Portland cement-based pavement repair materials are easy to construct, but the early compressive strength is low, the setting time is long, and hardening is slow. New and old materials The bonding performance is poor, and the pavement of repair materials cannot be restored to traffic in time, while the new and old materials of special cement pavement repair materials have good adhesion, fast setting and hardening, and high early compressive strength, but they face the problem of reduced strength in the later stage, and their manufacturing costs Too high, it is not suitable for large-scale promotion and repair, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/006C04B2111/0075C04B2201/50C04B18/0409C04B18/101C04B14/386C04B2103/0068C04B2103/408C04B24/38Y02P40/10
Inventor 卢亦焱李杉李发平杨哲铭陈淼陈得锋
Owner WUHAN UNIV
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