Drainage regenerated asphalt mixture and match ratio design method thereof

A technology of recycled asphalt and design method, which is applied in the field of building materials, and can solve problems such as the life span of asphalt pavement, and the regeneration technology has not been effectively solved.

Inactive Publication Date: 2017-06-30
SHANGHAI PUDONG ROAD & BRIDGE CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, drainage asphalt pavement has been vigorously developed as a new type of pavement in China, but

Method used

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  • Drainage regenerated asphalt mixture and match ratio design method thereof
  • Drainage regenerated asphalt mixture and match ratio design method thereof
  • Drainage regenerated asphalt mixture and match ratio design method thereof

Examples

Experimental program
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Embodiment 1

[0021] The drainage recycled asphalt mixture includes recycled materials, aggregates, fillers, fiber stabilizers and diluted asphalt. The recycled material is excavated and milled after drainage asphalt mixture has been used on the road surface for more than ten years; the aggregate includes coarse aggregate and fine aggregate, the coarse aggregate is basalt, the The fine aggregate is limestone; the maximum nominal particle size of the aggregate is 13.2mm; the filler is limestone powder; the fiber stabilizer is lignin fiber or basalt mineral fiber or a mixed fiber of the two, and the dosage is 0.1%-0.6% of the mass of the drainage recycled asphalt mixture; the diluted asphalt is diluted polymer modified asphalt, and the dosage is 4.8%-7.6% of the mass of the drainage recycled asphalt mixture. The diluted polymer modified asphalt comprises base asphalt, modifier, wax, diluent and anti-stripping agent, wherein: the base asphalt is 70# base asphalt; the modifying agent is a high-...

Embodiment 2

[0023] In this embodiment 2, the drainage recycled asphalt mixture is the same as that of embodiment 1; the proportioning design method of this recycled asphalt mixture comprises the following steps: using the interference theory as the basis, controlling the key sieve size of the coarse aggregate and the fine aggregate By percentage ratio relationship. By controlling the percentage ratio relationship between coarse aggregate and fine aggregate through the key sieve size, the division of coarse and fine aggregate is the theoretical basis for the design using interference theory; when three spheres are embedded and squeezed, the contact surfaces are spherical or flat. , there are four possible combinations, the gaps formed are 0.15, 0.20, 0.24 and 0.29 times the diameter of the circle respectively, take the average value, and take the sieve size corresponding to 0.22 times the maximum nominal particle size (D) as the The dividing point of coarse and fine aggregates in the mixtu...

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Abstract

The invention discloses a drainage regenerated asphalt mixture. The mixture comprises a recycled material, aggregate, padding, a fiber stabilizer and cutback asphalt, wherein the recycled material is formed by digging and milling a used drainage asphalt mixture on a pavement for more than ten years; the aggregate comprises coarse aggregate and fine aggregate; the coarse aggregate adopts basalt; the fine aggregate adopts limestone; the nominal maximum aggregate size of the aggregate is 13.2mm; the padding adopts lime stone dust; the fiber stabilizer adopts lignin fiber, basalt mineral fiber or mixed fiber of the lignin fiber and the basalt mineral fiber; the mixing amount of the fiber stabilizer is 0.1 to 0.6 percent of the mass of the drainage regenerated asphalt mixture; the cutback asphalt adopts cutback polymer modified asphalt, and the mixing amount of the cutback asphalt is 4.8 to 7.6 percent of the mass of the drainage regenerated asphalt mixture. The invention further discloses a match ratio design method of the drainage regenerated asphalt mixture. The match ratio design method ensures that the blending ratio of the recycled material is optimized while guaranteeing the pavement performance of the drainage asphalt mixture.

Description

technical field [0001] The invention belongs to the technical field of building materials used in road engineering, and in particular relates to a drainage recycled asphalt mixture and a proportioning design method thereof. Background technique [0002] Drainage asphalt pavement is a typical skeletal pore structure. A large number of connected spaces form a developed drainage network inside the road. Rainwater is discharged from the inside of the road body along the cross slope of the road through the network. Due to its excellent anti-skid performance, Functions such as no accumulation of water on the surface and sound absorption and noise reduction have been widely promoted and applied in the construction of the upper layer of asphalt pavement. In the repair stage, how to deal with these waste drainage asphalt mixtures is an urgent task at present. [0003] Since the drainage asphalt mixture mostly uses expensive high-viscosity modified asphalt and high-quality aggregates...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B20/00C04B18/16
CPCC04B20/0076C04B26/26C04B2111/0075C04B14/14C04B14/28C04B18/16C04B24/00C04B2103/0068C04B18/24C04B14/4656Y02W30/91
Inventor 闫国杰施曙东周维维马利志石剑许严徐韵淳周旭何智龙邓国民袁月王腾飞夏庆宇朱焕光
Owner SHANGHAI PUDONG ROAD & BRIDGE CONSTR
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