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High-strength and high-toughness light polyurethane rubber bridge deck paving material and preparation thereof

A polyurethane rubber and bridge deck pavement technology, which is applied in the field of bridge deck pavement materials, can solve the problems of unfavorable promotion and high cost, and achieve the effects of improving water stability, prolonging service life, and meeting energy conservation and environmental protection

Active Publication Date: 2019-10-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of cement in this concrete material is greater than 20%, and the cost is higher compared with traditional asphalt mixture, which is not conducive to popularization

Method used

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  • High-strength and high-toughness light polyurethane rubber bridge deck paving material and preparation thereof
  • High-strength and high-toughness light polyurethane rubber bridge deck paving material and preparation thereof
  • High-strength and high-toughness light polyurethane rubber bridge deck paving material and preparation thereof

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Experimental program
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Effect test

preparation example Construction

[0037] The present invention provides a kind of preparation method of the polyurethane rubber mixture that is used as bridge deck paving material, and its flow process sees figure 1 As shown, the specific steps are:

[0038] 1) Mix crushed stone aggregates with different particle sizes and rubber particles with a particle size of 1 to 5 mm at room temperature for 60 seconds according to a certain ratio to obtain uniformly mixed aggregates;

[0039] 2) Stir the two-component modified polyurethane component A and component B at room temperature for 120s to obtain a polyurethane cement;

[0040] 3) mixing the polyurethane cement into the uniform aggregate and stirring for 60s to obtain the polyurethane rubber particle mixture;

[0041] 4) Finally, rubber particles with a particle size of 0-1mm, cement and mineral powder were mixed into the mixture of polyurethane rubber particles and stirred for 90s, compacted and cured at room temperature for 48 hours to prepare a lightweight, hi...

Embodiment 1

[0043] According to the polyurethane rubber compound embodiment 1 provided by the present invention, it contains the following materials and parts by mass of each material, as shown in Table 1 below:

[0044] Table 1

[0045]

[0046] Mineral aggregates are basalt crushed stone aggregates with a particle size of 10-15mm, basalt crushed stone aggregates with a particle size of 5-10mm, and limestone crushed stone aggregates with a particle size of no more than 5mm, and the ratios of the mass parts of the three aggregates are: 15:55:30, the mineral aggregates of various particle sizes meet the performance requirements of "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2004).

[0047] The preparation method of above-mentioned polyurethane rubber mixture, its process reference figure 1 In the process shown, the prepared polyurethane rubber mixture is compacted and molded at a temperature of 0-40°C, and the performance test is performed after 48 ...

Embodiment 2

[0049] The polyurethane rubber mixture embodiment 2 provided according to the present invention contains the following materials and parts by mass of each material, as shown in Table 2 below:

[0050] Table 2

[0051]

[0052] Mineral aggregates are basalt crushed stone aggregates with a particle size of 10-15mm, basalt crushed stone aggregates with a particle size of 5-10mm, and limestone crushed stone aggregates with a particle size of 0-5mm, and the ratios of the mass parts of the three aggregates are: 10:50:40, mineral aggregates of various particle sizes meet "male Technical Specifications for Asphalt Pavement Construction (JTG F40-2004) performance requirements.

[0053] The preparation method of above-mentioned polyurethane rubber mixture, its process reference figure 1 In the process shown, the prepared polyurethane rubber mixture is compacted and molded at a temperature of 0-40°C, and the performance test is performed after 48 hours of curing. Refer to the "T...

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Abstract

The invention relates to a high-strength and high-toughness light polyurethane rubber bridge deck paving material and preparation thereof. According to the formula, the bridge deck paving material isspecifically prepared from the components in parts by weight: 100 parts of mineral aggregate, 3-15 parts of a polyurethane cementing agent, 0-5 parts of cement, 0-5 parts of mineral powder, 0-40 partsof rubber particles with a grain size of 1-5 mm and 0-20 parts of rubber particles with a grain size of less than 1 mm. Compared with the prior art, the high-toughness polyurethane is utilized as thecementing agent, the high-strength and high-toughness light polyurethane rubber bridge deck paving material has high strength, high toughness and fatigue resistance and has a compact structure and good coordination ability with bridge deck deformation, and the occurrence of bridge deck cracks can be prevented; mixed rubber granules can not only prepare light mixtures, but also control the relative bulk density of the mixture to be 1.8-2.5 g / cm<3>, the waste rubber can be effectively utilized, and a new concept of green roads is met.

Description

technical field [0001] The invention belongs to the technical field of bridge deck pavement materials, and relates to a preparation method of a high-strength, high-toughness lightweight polyurethane rubber bridge deck pavement material. Background technique [0002] Bridges are important connections and components of expressways. If the bridge pavement material is insufficient in strength, water resistance, high temperature stability, and flexibility, etc., it will lead to cracks, wrapping and potholes in the bridge pavement, which will eventually lead to Moisture enters the interior of the bridge and has a great impact on the durability of the bridge. Although in the past ten years, epoxy asphalt mixture has been used more and more in bridge deck pavement due to its excellent high temperature stability and high strength. However, since epoxy asphalt is a thermosetting material, it is brittle after curing, has poor flexibility, and has poor coordination with the deformation...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017C04B2111/0075C04B2201/50C04B14/14C04B14/28C04B24/282C04B18/20
Inventor 丛林杨帆史佳晨郭桂宏谭乐任敏达
Owner TONGJI UNIV
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