Composite synergistic close-graded ultrathin wearing layer asphalt mixture

A technology of asphalt mixture and compound efficiency, applied in the field of road paving materials

Inactive Publication Date: 2014-02-19
JIANGSU TRANSPORTATION RES INST CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to overcome the defects of the existing wear layer asphalt mixture, and provide a new type of composite synergistic dense gradation ultra-thin wear layer asphalt mixture, wh...

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  • Composite synergistic close-graded ultrathin wearing layer asphalt mixture
  • Composite synergistic close-graded ultrathin wearing layer asphalt mixture
  • Composite synergistic close-graded ultrathin wearing layer asphalt mixture

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Embodiment 1

[0026] The asphalt mixture in this example is mainly composed of three components: 100 parts by mass of mineral aggregate, 5.8 parts by mass of SBS modified asphalt and 0.35 parts by mass of composite synergist. The SBS modified asphalt is SBS from Jiangsu Baoli Modified asphalt, mineral materials include basalt aggregate and limestone powder, the quality of basalt aggregate and limestone powder accounted for 96% and 4% of the mineral material respectively, basalt aggregate is divided into three groups according to aggregate particle size, the first A group of aggregate particle size: 5 ~ 10mm; the second group of aggregate particle size: 3 ~ 5mm; the third group of aggregate particle size: 0 ~ 3mm, and the percentage of the aggregate mass of the three groups in the total mass of mineral materials is as follows: 58%, 6%, 32%.

[0027] According to the requirements, the density test of SBS modified asphalt (see Table 1 for the results), the density test of each group of aggrega...

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Abstract

The invention discloses a composite synergistic close-graded ultrathin wearing layer asphalt mixture which comprises the following ingredients in parts by mass: 100 parts of mineral aggregate, 5.4-5.8 parts of SBS (styrene-butadiene-styrene) modified asphalt and a composite synergist with the mass accounting for 0.30-0.40% of the total mass of the mineral aggregate, wherein the mineral aggregate comprises the following ingredients by mass percentage: 95-96% of basalt aggregate and 4-5% of limestone mineral powder. The workable performance and high temperature property of the asphalt mixture are improved mainly by adding the composite synergist which mainly comprises polyoxyethylene, and the thin curing asphalt mixture which is low in cooling rate, easy to compact, good in workable performance, strong in high temperature stability, good in skid resistance and small in paving thickness is provided by optimizing graduation of the asphalt mixture, the amount of asphalt and volume indexes of the asphalt mixture.

Description

technical field [0001] The invention relates to road paving materials, in particular to a composite synergistic dense-graded ultra-thin wear layer asphalt mixture. Background technique [0002] As my country's expressways have gradually entered the peak period of maintenance, thin-layer treatment (overlay) technologies will be one of the main maintenance technologies for expressways for a long period of time in the future, both in terms of performance and economics. However, at present, the thin-layer treated asphalt mixture generally has the difficulties of rapid cooling and difficult compaction. Chinese patent (201110303924.5) invented an ultra-thin pavement wear layer, which is composed of 75-87% aggregate, 5-14% filler, 7.5-10.5% high-performance asphalt and 0.225-0.735% warm mix additive, among which high-performance asphalt Add 20-28% waste tire rubber powder. This kind of anti-skid wear layer is used to restore the surface function of old roads or anti-skid of new r...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B18/12
CPCY02W30/91
Inventor 关永胜张志祥韩超黄荣华刘强胡兴国
Owner JIANGSU TRANSPORTATION RES INST CO LTD
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