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Polyurethane mixture mix proportion design method based on pavement performance

A technology of mix ratio design and road performance, applied in applications, household appliances, other household appliances, etc., can solve problems such as insufficient design indicators, achieve considerable economic benefits, reduce costs, and simplify the design process

Pending Publication Date: 2022-01-28
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for designing the proportion of polyurethane mixture based on road performance, so as to solve the problems such as the lack of design indicators of the proportion of polyurethane mixture at present.

Method used

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  • Polyurethane mixture mix proportion design method based on pavement performance
  • Polyurethane mixture mix proportion design method based on pavement performance
  • Polyurethane mixture mix proportion design method based on pavement performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] According to the specific steps of the above-mentioned embodiment, performance tests are performed on aggregates and mineral powders with particle sizes of 10-15mm, 5-10mm, and 0-5mm to meet the technical specifications. Using AC-13 gradation as the design gradation, the resulting synthetic gradation is shown in the following table:

[0055]

[0056] The void ratio VV value of the designed polyurethane mixture is 3%, the film thickness of the dense polyurethane mixture is 5-10 μm, the relative density of the polyurethane cement is 1.15, etc., and the initial polyurethane dosage is calculated according to the formula to be 3.38-6.76%; the proposed dosage of polyurethane 3%, 4%, 5%, 6%, 7%, using the Marshall compaction method to prepare Marshall specimens and rut specimens, the void ratio VV of Marshall specimens, scattering loss and anti-skid performance of rutting specimens Test, and take the amount of polyurethane binder as the abscissa and various road performance...

Embodiment 2

[0061] According to the specific steps above, the performance test of aggregates and mineral powders with a particle size of 10-15mm, 5-10mm, and 0-5mm meets the technical specifications. Using OGFC-13 gradation as the design gradation, the resulting synthetic gradation is shown in the following table:

[0062]

[0063] The porosity VV value of the designed polyurethane mixture is 18%, the film thickness of the macroporous polyurethane mixture is 10-20 μm, the relative density of the polyurethane binder is 1.15, etc., and the initial polyurethane dosage is calculated according to the formula to be 4.11-8.21%. The dosage is 4%, 5%, 6%, 7%, 8%. The Marshall test piece and the rut test piece are prepared by Marshall compaction method, and the void ratio VV, the scattering loss of the Marshall test piece, and the skid resistance of the rut test piece Carry out the test, and take the amount of polyurethane cement as the abscissa and various road performances as the ordinate to d...

Embodiment 3

[0068] According to the specific steps above, the performance test of aggregates and mineral powders with a particle size of 10-15mm, 5-10mm, and 0-5mm meets the technical specifications. Using SMA-13 ​​gradation as the design gradation, the final synthetic gradation is shown in the following table:

[0069]

[0070] The void ratio VV value of the designed polyurethane mixture is 4%, the film thickness of the dense polyurethane mixture is 5-10 μm, the relative density of the polyurethane cement is 1.15, etc., and the initial polyurethane dosage is calculated according to the formula to be 4.19-8.38%; the proposed dosage of polyurethane 4%, 5%, 6%, 7%, 8%, using the Marshall compaction method to prepare Marshall specimens and rutting specimens, the void ratio VV of Marshall specimens, scattering loss and anti-skid performance of rutting specimens Test, and take the amount of polyurethane binder as the abscissa and various road performances as the ordinate to determine the am...

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Abstract

The invention relates to a polyurethane mixture mix proportion design method based on pavement performance. The method comprises the following steps of: (1) selecting mineral aggregates and determining the gradation of the mineral aggregates; (2) determining a designed void ratio; (3) according to the specific surface area of the mineral aggregates and the designed thickness of a cementing agent film, determining the initial dosage of a used polyurethane cementing agent, and performing adjustment to obtain different initial dosages to prepare different Marshall test pieces and rut test pieces; (4) forming an asphalt-aggregate ratio performance coordinate graph by taking the initial dosage of the polyurethane cementing agent as an abscissa and taking the pavement performance of the Marshall test pieces and the rut test pieces as an ordinate, and obtaining the optimal dosage of the polyurethane cementing agent through a balance design formula; and (5) detecting whether the pavement performance of a polyurethane mixture is qualified or not under the condition of the optimal dosage of the polyurethane cementing agent. Compared with the prior art, the method is not only suitable for a traditional mixture structure, but also suitable for a mixture structure with a single particle size, is simple in the whole design process, and is low in design cost.

Description

technical field [0001] The invention belongs to the technical field of high polymer mixture pavement materials, and relates to a method for designing the mixing ratio of polyurethane mixture based on road performance. Background technique [0002] Asphalt pavement is widely used in high-grade highways due to its advantages of smooth surface, no joints, high driving comfort and short construction period. However, as a by-product of petrochemical industry, asphalt is a viscoelastic material, and its performance is greatly affected by temperature. For example, permanent deformation diseases such as rutting and bagging are prone to occur under high temperature conditions, and temperature shrinkage cracks often occur at low temperatures. At the same time, from the perspective of long-term use, asphalt pavement often suffers from aging, water damage and other diseases, which seriously affect the service life of asphalt pavement. Although the current polymer modified asphalt binde...

Claims

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Application Information

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IPC IPC(8): G16C60/00G16C20/30G16C20/80G16C20/90C04B26/16C04B38/00
CPCG16C60/00G16C20/30G16C20/80G16C20/90C04B26/16C04B2111/0075C04B2111/00991C04B14/28C04B38/0041C04B38/0074C04B14/14
Inventor 谭乐丛林杨帆柳颖臣邓海斌陆新民
Owner TONGJI UNIV
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