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Design method of warm mix sbs ultra-thin wearing layer asphalt mixture

A design technology of asphalt mixture and mix ratio, which is applied in the field of mix ratio design of asphalt mixture for warm-mix SBS ultra-thin wear layer, and can solve the problems of little research on design methods and little addition of waste plastics.

Active Publication Date: 2021-11-12
宁夏睿泰天成新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the stability of waste plastics in asphalt, there are few studies on the use of waste plastics in asphalt mixtures for ultra-thin wear layers, and the amount of waste plastics added in the research is relatively small
In the prior art, there are few researches on the mix ratio design method of warm mix SBS ultra-thin wear layer asphalt mixture for stability

Method used

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  • Design method of warm mix sbs ultra-thin wearing layer asphalt mixture
  • Design method of warm mix sbs ultra-thin wearing layer asphalt mixture
  • Design method of warm mix sbs ultra-thin wearing layer asphalt mixture

Examples

Experimental program
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Embodiment 1

[0025] An asphalt mixture designed for the wearing course of a Ningxia expressway, initially selected SBS modified asphalt raw materials: 100 parts of base asphalt, 5 parts of SBS, 8 parts of waste plastics, 0.8 parts of succinimide-succinate and dimethylamino 1.5 parts of ethacrylate and butadiene block copolymer dispersant, 0.3 parts of 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane. The monomer ratio of dimethylaminoethyl acrylate and butadiene block copolymer SBS asphalt mixture is 49:50, and the polymer viscosity is 100 cps at 25 °C. The asphalt mixture includes 80% by weight of aggregate, 12% by weight of filler, and 8% by weight of SBS modified asphalt. Through the trial mix method, the selected asphalt mixture mineral material gradation is shown in the following table:

[0026] Table 4 Mineral gradation of asphalt mixture

[0027]

[0028] The oil-stone ratio is selected as 5, the asphalt heating temperature, aggregate heating temperature and mixing temperature are all...

Embodiment 2

[0030] An asphalt mixture designed for the wearing course of a Ningxia Expressway, initially selected SBS modified asphalt raw materials: 100 parts of base asphalt, 7 parts of SBS, 10 parts of waste plastics, 0.8 parts of succinimide-succinate and dimethylamino 1.3 parts of ethacrylate and butadiene block copolymer dispersant, 0.4 parts of 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane. The monomer ratio of dimethylaminoethyl acrylate and butadiene block copolymer is 60:40, and the viscosity of the polymer is 500cps at 25°C. The asphalt mixture includes 79 wt% aggregate, 12 wt% filler, 9 wt% SBS modified asphalt. Through the trial mix method, the gradation of the selected asphalt mixture is the same as Table 4. Select the asphalt ratio as 6, make 5 Marshall specimens according to the conditions shown in Example 1, and test the void ratio, mineral void ratio, asphalt saturation and other indicators of the specimens respectively. Determine the optimum amount of asphalt is 9.8%. Th...

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Abstract

The invention relates to a mixing ratio design method for a warm-mixed SBS ultra-thin wear layer asphalt mixture. ; The material varieties of asphalt mixture include SBS modified asphalt, aggregates and fillers, and the raw materials of SBS modified asphalt include matrix asphalt, SBS, waste plastics, succinimide-succinate and aminoacrylate substances and Butadiene copolymer, peroxide. The invention is designed based on the stability of the asphalt mixture, overcomes the problem of instability of the current general-purpose waste plastic system, improves the strength and toughness of the mixture, and improves the ability of the road surface to resist damage such as rutting.

Description

technical field [0001] The patent belongs to the design field of asphalt pavement materials, in particular to a method for designing the mix ratio of warm-mixed SBS ultra-thin wearing layer asphalt mixture. Background technique [0002] At present, more and more waste plastics are used to modify asphalt, which not only solves the pollution problem of waste plastics, but also can improve road asphalt, reduce the pressure of road maintenance, and save money and resources. Compared with plastics using a single or two polymers, waste plastics are mostly mixed plastics. If each waste plastic is sorted out one by one, the cost of recycling waste plastics will be greatly increased. Waste plastics are difficult to be compatible with matrix asphalt, and the doping amount cannot be very high, and the storage stability of plastic asphalt is poor. Although Wang Gang pointed out in his master's thesis "Research on Polyolefin Waste Plastics as Road Asphalt Performance Improvement Materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/50C04B18/20C04B24/28C04B24/283C04B24/00C04B18/12
Inventor 何鹏马成郭朝阳马海洋王天军
Owner 宁夏睿泰天成新材料科技有限公司