Cement concrete pavement rapid repair material and preparation method thereof

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...

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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

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