Rapid traffic repair material and construction method for partial replacement of cement concrete pavement

A technology of cement concrete and repair materials, which can be applied to cohesive pavement paved on site, roads, roads, etc., and can solve problems such as damage, overall incoordination of color pavement, and easy water damage

Active Publication Date: 2020-12-25
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If asphalt mixture is used for repair, but because it is an organic material, there are problems of poor interface bonding and deformation inconsistency with inorganic materials such as cement concrete, and because the asphalt mixture is easy to water damage, it is repaired with asphalt mixture. In the rainy season, damage will occur 3-4 months after the repair, and the color is seriously inconsistent with the overall road surface

Method used

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  • Rapid traffic repair material and construction method for partial replacement of cement concrete pavement

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Experimental program
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Embodiment

[0015] Basic recipe:

[0016] The rapid repair concrete is composed of raw materials according to the following percentages: 400kg of composite cement, 682kg of wear-resistant medium sand, crushed stone (113kg of small stone, 432kg of medium stone and 655kg of large stone), 4kg of polycarboxylate superplasticizer, 140kg of water, and a small amount of compound admixture.

[0017] The interface agent is composed of raw materials according to the following percentages: 76% of composite cement, 6% of composite modifier, 0.5% of polycarboxylate water reducer, and 18% of water.

[0018] in,

[0019] Composite cement is C 2 S modified sulfoaluminate cement P.S42.5 (Guangxi Yunyan brand), of which C 2 S dosage is 4.2%, C 2 S. The weight ratio of sulphoaluminate cement is 1:3.

[0020] The wear-resistant medium sand is composed of river sand (Xinlong sand field river sand zone II sand) and steel slag in a mass ratio of 10:1.

[0021] The sand rate of the concrete is between 36% a...

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Abstract

The invention discloses a quick traffic opening repair material for the local plate replacement of a cement concrete pavement. The quick traffic opening repair material comprises rapid repair concreteand an interface agent, wherein the rapid repair concrete comprises the following raw materials: composite cement, wear-resistant medium sand, broken stone, a polycarboxylic acid water reducing agent, water and a composite admixture according to a specific ratio, and the interface agent comprises the following raw materials: composite cement, a composite modifier, a polycarboxylic acid water reducing agent and water according to a specific ratio. The invention further discloses a corresponding construction method. According to the present invention, with the repair material and the construction method thereof, the centralized production and the medium-short-distance transportation can be achieved while the setting time and the early strength at the pouring site can be adjusted so as to meet the traffic opening requirement at the 12th h after the construction, such that the important value is provided for the achievement of the low-cost pavement maintenance and the rapid traffic opening recovery.

Description

technical field [0001] The invention belongs to the technical field of maintenance and repair of cement concrete pavement, and in particular relates to a quick-opening repair material and a construction method for partial plate replacement of cement concrete pavement. Background technique [0002] Cement concrete pavement is the main structural form of my country's road network and highway pavement, which has the characteristics of low cost and high strength. However, with the development of the domestic economy and the increase of heavy-duty traffic, most of the concrete in operation has various diseases. When the disease develops to a certain extent, it is necessary to chisel out the partial plate and replace the plate. At present, ordinary Portland cement concrete is still used for partial replacement of concrete, and its curing time reaches 14 days, and it takes 7 days to open to traffic with special measures. If asphalt mixture is used for repair, but because it is an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06E01C7/14
CPCC04B28/06C04B2111/0075C04B2201/10C04B2201/50E01C7/147C04B14/068C04B18/142C04B14/02C04B24/24C04B22/002C04B24/06C04B24/10C04B22/082C04B22/124C04B24/2623
Inventor 周胜波熊剑平姚新宇李庚飞禤炜安
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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