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Steel slag permeable asphalt mixture

A technology of permeable asphalt and mixture, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of high price, achieve good durability, protect geological environment, and high Marshall stability

Active Publication Date: 2013-07-31
宝武环科武汉金属资源有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of high-quality stone has little or no reserves in most areas of our country, so their prices are relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare 19-13.2mm, 13.2-9.5mm, 9.5-4.75mm steel slag particle coarse aggregate and 4.75-0mm limestone particle fine aggregate for backup;

[0019] Based on the total weight of aggregates as 100 parts, weigh 15 parts of aggregates of 19-13.2mm, 27 parts of aggregates of 13.2-9.5mm, 44 parts of aggregates of 9.5-4.75mm, and 11 parts of aggregates of 4.75-0mm. After mixing with 3 parts of limestone ore powder, dry it in an oven at 180°C to constant weight, pour it into the mixing equipment, add 0.3 parts of polyester fiber and mix it evenly for 90s, then add 5 parts of SBS Modified asphalt, obtained by uniform mixing for 90s.

[0020] The above-mentioned steel slag is obtained from the converter slag of Wuhan Iron and Steel Company after three years of aging under natural conditions, and its apparent relative density is 3.300-3.400g / cm 3 The content of free calcium oxide is between 1.0-1.5%; the volume expansion rate is not more than 2% after soaking in hot water at 60°C ...

Embodiment 2

[0022] Prepare steel slag particle coarse aggregate with a particle size range of 19-13.2mm, 13.2-9.5mm, 9.5-4.75mm and limestone particle fine aggregate with a particle size range of 4.75-0mm for subsequent use;

[0023] Based on the total weight of aggregates as 100 parts, weigh 16 parts of aggregates of 19-13.2mm, 26 parts of aggregates of 13.2-9.5mm, 43 parts of aggregates of 9.5-4.75mm, and 13 parts of aggregates of 4.75-0mm After mixing with 2 parts of limestone ore powder, dry it in an oven at 180°C to constant weight, pour it into the mixing equipment, and add 0.2 parts of polyester fiber to mix evenly for 90s, then add 4.4 parts The SBS modified asphalt is obtained by uniform mixing for 90s.

[0024] The above-mentioned steel slag is obtained from the converter slag of Wuhan Iron and Steel Company after three years of aging under natural conditions, and its apparent relative density is 3.300-3.400g / cm 3 The content of free calcium oxide is between 1.0-1.5%; the volum...

Embodiment 3

[0026] Prepare steel slag particle coarse aggregate with a particle size range of 19-13.2mm and 13.2-9.5mm and limestone particle coarse aggregate with a particle size range of 9.5-4.75mm and 4.75-0mm for subsequent use;

[0027] Based on the total weight of aggregates as 100 parts, weigh 15 parts of aggregates of 19-13.2mm, 28 parts of aggregates of 13.2-9.5mm, 43 parts of aggregates of 9.5-4.75mm, and 11 parts of aggregates of 4.75-0mm. After mixing with 3 parts of limestone ore powder, dry it in an oven at 180°C to constant weight, pour it into the mixing equipment, and add 0.4 parts of polyester fiber to mix evenly for 90s, then add 4.2 parts The SBS modified asphalt is obtained by uniform mixing for 90s.

[0028] The above-mentioned steel slag is obtained from the converter slag of Wuhan Iron and Steel Company after three years of aging under natural conditions, and its apparent relative density is 3.300-3.400g / cm 3 The content of free calcium oxide is between 1.0-1.5%; ...

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Abstract

The invention relates to a steel slag permeable asphalt mixture. The steel slag permeable asphalt mixture is obtained through blending aggregates, a fiber stabilizing agent and asphalt, the weights of the fiber stabilizing agent and asphalt are 0.2-0.4% and 4-5% of the weight of the aggregates respectively, the aggregates are composed of coarse aggregates, fine aggregates and a filler, the coarse aggregates are steel slag or a mixture comprising the steel slag and limestone and have granularities composed of 19-13.2mm, 13.2-9.5mm and 9.5-4.75mm, the fine aggregates are limestone and have a granularity of 4.75-0mm, and the aggregates concretely comprise 15-17wt% of a coarse aggregate having a granularity of 19-13.2mm, 26-29wt% of a coarse aggregate having a granularity of 13.2-9.5, 43-45wt% of a coarse aggregate having a granularity of 9.5-4.75mm, 11-13wt% of a fine aggregate having a granularity of 4.75-0mm, and 2-4wt% of the filler. The permeable asphalt mixture prepared through the use of the steel slag to partially or completely substitute the aggregates and the addition of the fiber stabilizing agent and the asphalt has a porosity satisfying requirements, and has a high Marshall stability, a small drainage loss and a small Starkenburg flying rate.

Description

technical field [0001] The invention belongs to the research field of highway building materials, and in particular relates to a steel slag permeable asphalt mixture. Background technique [0002] In recent years, asphalt pavement has developed rapidly because of its excellent road performance and comfortable driving performance. By the end of 2010, the total mileage of my country's highways has reached nearly 4 million kilometers, and the expressway has reached 74,000 kilometers, most of which are asphalt roads. At present, more than 90% of the asphalt pavement that has been built is designed according to the principle of dense gradation, which belongs to the dense asphalt concrete pavement with a small design void ratio. This pavement structure has the characteristics of dense, impermeable, high strength, good water stability, low temperature crack resistance, and durability, but poor high temperature stability and high noise. On the slippery surface, the water in the ro...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B18/14
CPCY02W30/91
Inventor 李灿华汪平刚李晖汪晖陈静刘思甘万贵吴少鹏吴江红焦立新
Owner 宝武环科武汉金属资源有限责任公司
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