A kind of colored permeable pavement upper layer asphalt mixture and its preparation method

A technology of asphalt mixture and permeable pavement, which is applied in the field of road engineering, can solve the problems of research on the mechanical properties of asphalt mixture with angular wear, unsatisfactory water permeability of permeable pavement, and easy fading of colored surface layer after service time, so as to alleviate urban heat island "Effect, improve water damage resistance, and obvious effect of reinforcement

Active Publication Date: 2022-01-14
CHINA NAT CHEM COMM CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current permeable asphalt pavement has the following problems: the water permeability of the permeable pavement cannot meet the road surface requirements for timely drainage of rainwater, resulting in rainwater accumulation, which affects the service life of the permeable pavement; the color surface layer is easy to fade after a long service time, etc.
However, no research has been conducted on the angular wear of aggregates during the mixing process and the impact on the mechanical properties of asphalt mixtures for permeable pavements.
[0005] In the current prior art, although asphalt modifiers have been used to prepare permeable asphalt mixtures, the cost is relatively high, and the color of the prepared asphalt mixtures is single, which is the traditional "black road surface", and a single limestone mine is mostly used. Powder or slaked lime etc. are used as the filler of the permeable asphalt mixture; the colored asphalt pavement in the prior art has poor color durability on relatively busy roads, and the friction between the tire and the road surface during the running of the vehicle will cause the paint to fall off, and the daily sunlight The aging of asphalt binder due to irradiation, dust stains, etc. will cause the asphalt pavement to fade, and the service life will be short. At the same time, the preparation method of permeable asphalt mixture will also have a great impact on its performance.

Method used

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  • A kind of colored permeable pavement upper layer asphalt mixture and its preparation method
  • A kind of colored permeable pavement upper layer asphalt mixture and its preparation method
  • A kind of colored permeable pavement upper layer asphalt mixture and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] An asphalt mixture for the upper layer of colored permeable pavement, comprising the following raw materials, all in parts by weight: 3.12 parts of decolorized asphalt, 40.3 parts of aggregates of 3-5 mm, 51.3 parts of aggregates of 5-10 mm, and 1.93 parts of composite modified mineral powder Parts, 0.38 parts of granular lignin fiber, 2.89 parts of iron red.

[0054] The granular lignin fiber: the ash content is 17%, the pH value is 7.0, the oil absorption rate is 6.3 times, the thermal weight loss is 2%, and the moisture content is 2.3%.

[0055] The composite modified slag powder is: slaked lime powder and limestone slag powder are mixed, the slaked lime powder accounts for 40%, and the limestone slag powder accounts for 60%.

[0056] The preparation method of the above-mentioned permeable pavement upper layer asphalt mixture, the specific preparation method is as follows:

[0057] Step 1: Weigh the following components according to the weight of the above raw mater...

Embodiment 2

[0062] An asphalt mixture for the upper layer of colored permeable pavement, comprising the following raw materials, all in parts by weight: 3.42 parts of decolorized asphalt, 39.5 parts of aggregates of 3-5 mm, 52 parts of aggregates of 5-10 mm, and 1.95 parts of composite modified mineral powder parts, 0.4 parts of granular lignin fiber, and 2.9 parts of iron red.

[0063] The granular lignin fiber: the ash content is 17%, the pH value is 7.0, the oil absorption rate is 6.3 times, the thermal weight loss is 2%, and the moisture content is 2.3%.

[0064] The composite modified slag powder is: slaked lime powder and limestone slag powder are mixed, the slaked lime powder accounts for 40%, and the limestone slag powder accounts for 60%.

[0065] The preparation method of the above-mentioned permeable pavement upper layer bituminous mixture differs from Example 1 as follows:

[0066] In the step 2, all 3-5mm aggregates, 22% 5-10mm aggregates and granular lignin fibers were mixe...

Embodiment 3

[0068] An asphalt mixture for the upper layer of colored permeable pavement, comprising the following raw materials, all in parts by weight: 3.1 parts of decolorized asphalt, 39.82 parts of aggregates of 3-5 mm, 50.68 parts of aggregates of 5-10 mm, and 1.8 parts of composite modified mineral powder parts, 0.3 parts of granular lignin fiber, and 2.6 parts of iron red.

[0069] The granular lignin fiber: the ash content is 17%, the pH value is 7.0, the oil absorption rate is 6.3 times, the thermal weight loss is 2%, and the moisture content is 2.3%.

[0070] The composite modified slag powder is: slaked lime powder and limestone slag powder are mixed, and the proportion is: the slaked lime powder accounts for 35%, and the limestone slag powder accounts for 65%.

[0071] The preparation method of the above-mentioned permeable pavement upper layer bituminous mixture differs from Example 1 as follows:

[0072] In the step 2, all 3-5mm aggregates, 40% 5-10mm aggregates and granula...

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Abstract

The invention discloses an asphalt mixture for the upper layer of colored permeable pavement and a preparation method thereof. The asphalt mixture involved in the invention includes the following raw materials: decolorized asphalt, 3-5mm aggregate, 5-10mm aggregate, composite modified mineral powder, particles Lignin fiber, iron red; mainly disperse granular lignin fiber by mixing all small particle size aggregates (3-5mm) and some larger particle size aggregates (5-10mm), and use composite modified ore The asphalt mixture is prepared by mixing powder and raw materials; the asphalt mixture has the functions of water permeability and aesthetic integration, and it has been proved by relevant performance index tests that it has good road performance and durability. "It is of great significance to realize the construction goals of benign hydrological cycle and ecological energy saving.

Description

Technical field: [0001] The invention belongs to the technical field of road engineering, in particular to an asphalt mixture for the upper layer of colored permeable pavement and a preparation method thereof. Background technique: [0002] Most of the traditional asphalt or cement concrete pavement adopts an impermeable structure, and surface runoff water directly flows into the urban drainage system, which not only intensifies the urban drainage pressure, but also prevents rainwater from directly infiltrating into the ground, seriously affecting its utilization efficiency; at the same time, rainwater flows through the road When it gathers in the drainage system, it will dissolve into some other impurities to pollute it and cause new damage to the ecological environment. Secondly, because the rainwater cannot be discharged from the road surface in time, a large amount of rainwater stays on the road surface, and phenomena such as "drifting" and "glare" are prone to occur dur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B111/20
CPCC04B26/26C04B2111/0075C04B2111/00284C04B2111/20C04B18/26C04B14/28C04B14/36C04B2103/54
Inventor 贾坚王向刚辛星张鹏周鑫鑫
Owner CHINA NAT CHEM COMM CONSTR GRP CO LTD
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