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Asphalt concrete composition and preparation method thereof

A technology of asphalt concrete and composition, which is applied in the field of road engineering materials and preparation, to achieve the effect of reducing the average particle size, lower requirements, and improving adhesion

Inactive Publication Date: 2020-02-18
宝武集团环境资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to obtain a kind of high-durability and low-noise asphalt concrete by compound modification of sintered desulfurization ash and rubber powder through a preparation process

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  • Asphalt concrete composition and preparation method thereof
  • Asphalt concrete composition and preparation method thereof
  • Asphalt concrete composition and preparation method thereof

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Embodiment 1

[0026] Raw materials: basalt is used for coarse aggregate, limestone is used for fine aggregate; SBS modified asphalt is used for asphalt, natural limestone powder is used for mineral powder, and sintered desulfurization ash is obtained from sintering and desulfurization at Baoshan Base of Baosteel Co., Ltd. Its chemical composition and phase composition are as follows: Shown in Table 1 and Table 2. Refer to the standard "Limits of Radionuclides in Building Materials" (GB 6566-2010) to detect the specific activity of natural radionuclides radium-226, thorium-232, and potassium-40 in sintered desulfurization ash; Toxicity Identification" (GB 5085.3-2007) conducts leaching toxicity tests of copper, zinc, cadmium, lead and other heavy metal elements on sintered desulfurization ash samples. All technical indicators meet the relevant specifications and standards, as shown in Table 3 and Table 4 respectively.

[0027] Table 1 Chemical composition of sintered desulfurization ash

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Embodiment 2

[0055] Raw materials: basalt is used for coarse aggregate, limestone is used for fine aggregate; SBS modified asphalt is used for asphalt, limestone powder is natural limestone powder, and sintering desulfurization ash is obtained from sintering and desulfurization at Baoshan Base of Baosteel Co., Ltd. Standard Specification. The preparation of asphalt concrete and Marshall specimens refers to the relevant test procedures of "Test Regulations for Asphalt and Asphalt Concrete in Highway Engineering" (JTG E20-2011). The specific preparation process is as figure 1 , figure 2 shown. The performance indexes of asphalt concrete obtained by different preparation processes are shown in Table 12.

[0056] The impedance tube method is used to measure and study the sound absorption coefficient of ordinary asphalt concrete and dry and wet preparation processes of asphalt concrete modified by sintering desulfurization ash and rubber powder. Rate measurement specification" (GBJ88-85). ...

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Abstract

The invention discloses an asphalt concrete composition and a preparation method thereof. The asphalt concrete composition comprises 60-80 wt% of coarse aggregates, 10-30 wt% of fine aggregates, 3-8 wt% of a composite filler, 3-6 wt% of asphalt and 0.4-1.5 wt% of rubber powder. The high-durability and low-noise asphalt concrete with excellent ageing resistance, fatigue crack resistance, high-temperature rutting resistance and water damage resistance can be obtained; and sintered desulfurization ash, waste tires and other solid wastes are recycled, so resource occupation and ecological environment pollution are reduced, stone resources are saved, and the preparation cost of the asphalt concrete is reduced. The modified asphalt concrete is prepared by adopting a dry process; compared with awet process, the method using the dry process has the advantages of simplicity in operation, low requirements and large dosage of the rubber powder, realization of uniform dispersion of the rubber powder in the asphalt concrete structure system by dry mixing of the rubber powder and the aggregates before adding the asphalt, no addition of other special devices, and meeting of the actual construction requirements.

Description

technical field [0001] The invention relates to an asphalt concrete composition and a preparation method thereof, belonging to the technical field of road engineering materials and preparation. Background technique [0002] Since the 21st century, durable and long-life pavement and pavement materials have gradually become a hot research direction in the road industry at home and abroad. At present, the asphalt pavement structure is the main pavement form of high-grade highways in my country. With the development of the national economy and the improvement of the road transportation network, the proportion of large-scale cargo vehicles in the vehicle load continues to increase. The phenomenon is getting more and more serious, causing early damage such as rutting, potholes, and fatigue on the asphalt pavement, which seriously affects the service life and service level of the asphalt pavement. Therefore, developing a kind of asphalt pavement material suitable for long-term heav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2111/76C04B2201/50C04B14/28C04B18/062C04B18/141C04B18/22C04B14/14
Inventor 徐兵朱诚杨群汪毅李帅丁劲光金芳王轶男
Owner 宝武集团环境资源科技有限公司
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