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Quick-setting and quick-hardening early-strength and high-strength pavement patching material and preparation method thereof

A pavement repair and high-strength technology, applied in the field of building materials, can solve the problems of inability to meet the requirements of rapid repair of the pavement, unstable crystal forms of hydration products, and high cost of aluminate cement, so as to enhance the repair and use performance of the pavement, and the construction process is simple. Convenience, high strength and the effect of stable growth in later strength

Pending Publication Date: 2022-04-15
陕西秦汉恒盛新型建材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rapid-hardening portland cement has low early strength and large shrinkage in the later stage; aluminate cement has high cost, and the hydration product is unstable and prone to crystal transformation, resulting in later strength shrinkage; rapid-hardening sulfoaluminate and fluoroaluminic acid The setting time of salt cement is not easy to control, and the strength tends to shrink in the later stage; magnesium phosphate cement has the problem of poor water resistance, which cannot meet the needs of rapid road repair

Method used

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  • Quick-setting and quick-hardening early-strength and high-strength pavement patching material and preparation method thereof
  • Quick-setting and quick-hardening early-strength and high-strength pavement patching material and preparation method thereof

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Effect test

Embodiment 1

[0031] The fast-setting, rapid-hardening, early-high-strength pavement repair material of the present embodiment is prepared by the following components in parts by mass: 4.8 parts of ordinary Portland cement, 38.4 parts of rapid-hardening sulfoaluminate cement, and 4.8 parts of fly ash, which can be dispersed 0.5 part of latex powder, 0.5 part of modified fiber, 1.2 parts of water reducer, 11.5 parts of water, 38.4 parts of sand; the dispersible latex powder is a copolymer of ethylene / vinyl acetate; the preparation process of the modified fiber is : Put the polypropylene fiber in the silane coupling agent solution for 12 hours at 60°C, then wash it with deionized water, filter it, and dry it in a vacuum oven at 60°C for 8 hours, then cool it to room temperature, and put it in a dry place. Dried in a dish to constant weight to obtain modified polypropylene fibers, wherein the silane coupling agent solution is ultrasonically mixed with deionized water, absolute ethanol, and KH-5...

Embodiment 2

[0038] The fast-setting, rapid-hardening, early-high-strength pavement repair material of the present embodiment is prepared by the following components in parts by mass: 2.4 parts of ordinary Portland cement, 31.1 parts of rapid-hardening sulfoaluminate cement, 10.8 parts of mineral powder, and fly ash 3.6 parts, 0.5 parts of dispersible latex powder, 0.2 part of modified fiber, 1.4 parts of water reducer, 11.7 parts of water, 38.3 parts of sand; the dispersible latex powder is a copolymer of ethylene / vinyl acetate and styrene and butyl The mixture of diene copolymerized rubber powder mixed at a mass ratio of 1:1; the preparation process of the modified fiber is as follows: the polypropylene fiber is placed in the silane coupling agent solution for 12 hours at 60 ° C, and then deionized Wash with water, filter and place in a vacuum oven at 60°C to dry for 8 hours, then cool to room temperature, and put in a drying dish to dry to constant weight to obtain modified polypropylene...

Embodiment 3

[0045] The fast-setting, rapid-hardening, early-high-strength pavement patching material of the present embodiment is made of the following components in parts by mass: 14.2 parts of ordinary Portland cement, 23.7 parts of rapid-hardening sulfoaluminate cement, 2.4 parts of mineral powder, and fly ash 7.1 parts, 0.5 parts of dispersible latex powder, 0.5 part of modified fiber, 1.4 parts of water reducer, 12.3 parts of water, 37.9 parts of sand; the dispersible latex powder is a copolymer of ethylene / vinyl acetate, styrene and butyl The mixture of diene copolymer rubber powder and acrylate and styrene copolymer rubber powder mixed in a mass ratio of 1:1:1; the preparation process of the modified fiber is: put the polypropylene fiber into the silane coupling at 60°C Treated in the joint agent solution for 12 hours, then washed with deionized water, filtered, placed in a vacuum oven at 60°C, dried for 8 hours, cooled to room temperature, and dried to constant weight in a drying d...

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Abstract

The invention discloses a quick-setting and quick-hardening early-strength pavement patching material, which is prepared from the following components in parts by mass: 2.4 to 33.7 parts of ordinary Portland cement, 9.6 to 38.4 parts of quick-hardening sulphoaluminate cement, 0 to 10.8 parts of mineral powder, 0 to 7.1 parts of fly ash, 0.2 to 0.5 part of dispersible latex powder, 0.2 to 0.5 part of modified fiber, 1.1 to 1.4 parts of water reducing agent, 11.1 to 12.3 parts of water and 37.9 to 38.6 parts of sand. The invention also discloses a method for preparing the quick-setting, quick-hardening, early-strength and high-strength pavement patching material, which comprises the following steps: stirring a part of raw materials, adding water and a water reducing agent, adding modified fibers, and stirring to obtain the quick-setting, quick-hardening, early-strength and high-strength pavement patching material. According to the invention, the advantages of the components are integrated, the respective defects are made up, rapid setting, rapid hardening and high strength are realized, and the requirement of rapid pavement repair is met; the preparation process is simple, and rapid construction is realized.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a fast-setting rapid-hardening early-high-strength pavement repair material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the national economy, my country's transportation industry has achieved rapid development. As of the end of 2019, the total mileage of national highways reached 5.0125 million kilometers, an increase of 166,000 kilometers over 2018. Among them, cement concrete pavement occupies an important position in my country's pavement structure because of its advantages such as high mechanical strength, strong bearing capacity, good durability, and good economy. However, with the prolongation of service time, the pavement is exposed to the natural environment for a long time, and is exposed to the sun, rain and driving impact, resulting in different degrees of damage to the pavement, mainly inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B20/02C04B111/72C04B111/20C04B16/06
Inventor 王武锁任双倩宋心赵世冉王欢袁倩男
Owner 陕西秦汉恒盛新型建材科技股份有限公司
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