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A Steel Slag Permeable Asphalt Mixture Based on Waste Rubber Powder Modified High Viscosity Asphalt

A technology of permeable asphalt and waste rubber powder, which is applied in the field of road construction materials and asphalt roads. It can solve the problems of poor storage stability, limited modification effect, and occupation of land resources, and achieve excellent performance, improve driving conditions, and fast construction speed Effect

Active Publication Date: 2021-03-23
葛洲坝武汉道路材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel slag is directly discarded as waste, and a large amount of steel slag piles up into mountains, which not only occupies a large area of ​​land resources, but also causes great pollution to the environment
As a kind of chemically cross-linked rubber, rubber powder forms a three-dimensional space network through chemical bonds, and its composition is complex. It is more difficult to swell in asphalt than commonly used rubber (SBR, BR, etc.), which leads to the storage stability of waste rubber powder modified asphalt. Therefore, the key issue of modification is how to effectively dissolve waste rubber powder in asphalt and store it stably.

Method used

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  • A Steel Slag Permeable Asphalt Mixture Based on Waste Rubber Powder Modified High Viscosity Asphalt
  • A Steel Slag Permeable Asphalt Mixture Based on Waste Rubber Powder Modified High Viscosity Asphalt
  • A Steel Slag Permeable Asphalt Mixture Based on Waste Rubber Powder Modified High Viscosity Asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare steel slag coarse aggregates with particle sizes of 4.75-9.5mm and 9.5-16mm, basalt fine aggregates of 0-2.36mm and 2.36-4.75mm, and limestone fillers.

[0035] Based on the total weight of a Marshall test piece as 100%, weigh 44% and 38% of steel slag coarse aggregate with a particle size of 4.75-9.5mm and 9.5-16mm, and weigh 0-2.36mm and 2.36-4.75mm basalt The fine aggregates are 14% and 0% respectively, and mixed with 4% limestone filler, dried in an oven at 170°C to constant weight, poured into the mixing equipment, and added 4.6% waste rubber powder to modify high Sticky asphalt, obtained by mixing evenly for 180s.

[0036] The above-mentioned steel slag is converter hot-splash steel slag produced by Wuhan Iron and Steel Company. It is aged under natural conditions for one year and then ground by a cement mill. The apparent relative density is 3.20-3.30g / cm 3 Between, the f-CaO content is between 1.7% and 2.0%, and the volume expansion rate is not more tha...

Embodiment 2

[0042] Prepare coarse steel slag aggregates with particle sizes of 4.75-9.5mm and 9.5-16mm; fine basalt aggregates with particle sizes of 0-2.36mm and 2.36-4.75mm; limestone fillers are commonly used.

[0043] Based on the total weight of a Marshall test piece as 100%, weigh 40% and 44% of steel slag coarse aggregate with a particle size of 4.75-9.5mm and 9.5-16mm, and weigh basalt with a particle size of 0-2.36mm and 2.36-4.75mm The fine aggregates are 12% and 0% respectively, and mixed with 4% limestone filler, dried in an oven at 170°C to constant weight, poured into the mixing equipment, and added 5.5% waste rubber powder to modify high Sticky asphalt, obtained by mixing evenly for 180s.

[0044] The above-mentioned steel slag is converter hot-splash steel slag produced by Wuhan Iron and Steel Company. It is aged under natural conditions for one year and then ground by a cement mill. The apparent relative density is 3.20-3.30g / cm 3 Between, the f-CaO content is between 1....

Embodiment 3

[0050] Prepare steel slag coarse aggregates with particle sizes of 4.75-9.5mm and 9.5-16mm, fine basalt aggregates with particle sizes of 0-2.36mm and 2.36-4.75mm, and limestone fillers are commonly used.

[0051] Based on the total weight of a Marshall test piece as 100%, weigh 36% and 50% of steel slag coarse aggregate with a particle size of 4.75-9.5mm and 9.5-16mm, and weigh basalt with a particle size of 0-2.36mm and 2.36-4.75mm The fine aggregates are 10% and 0% respectively, mixed with 4% limestone filler, dried in an oven at 170°C to constant weight, poured into the mixing equipment, and added 5.2% waste rubber powder to modify high Sticky asphalt, obtained by mixing evenly for 180s.

[0052] The above-mentioned steel slag is converter hot-splash steel slag produced by Wuhan Iron and Steel Company. It is aged under natural conditions for one year and then ground by a cement mill. The apparent relative density is 3.20-3.30g / cm 3 Between, the f-CaO content is between 1....

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Abstract

The invention relates to a slag permeable asphalt mixture based on waste rubber powder modified high viscosity asphalt. The mixture is prepared from the following raw materials in parts by weight: 82-86 parts of a slag coarse aggregate, 10-14 parts of a basalt fine aggregate, 4 parts of limestone filler and 4.4-4.6 parts of waste rubber powder modified high viscosity asphalt. By replacing the coarse aggregate with slag and adding the waste rubber powder modified high viscosity asphalt, the porosity of the prepared slag permeable asphalt mixture meets the demand and has relatively high Marshallstability and relatively small Schellenburg leakage loss and Fort Kent dispersion rate.

Description

technical field [0001] The invention relates to the field of asphalt roads, in particular to the technical field of road building materials, in particular to a steel slag permeable asphalt mixture based on waste rubber powder modified high-viscosity asphalt. Background technique [0002] With the continuous development of our country's economy, the expressway construction business is also growing rapidly. Asphalt pavement has the advantages of good driving comfort, excellent performance, fast construction speed, and convenient maintenance. 90% of highway pavement structures adopt asphalt pavement structure. At present, about 90% of the asphalt pavement that has been built is designed according to the principle of dense gradation, which belongs to the dense gradation asphalt concrete pavement with small void ratio. This kind of pavement has high strength, good water stability, low temperature crack resistance, and durability, but poor water permeability, which makes a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/00017C04B2111/0075C04B18/142C04B14/14C04B14/28C04B18/22C04B20/0076C04B14/08C04B24/2676C04B24/2611C04B24/00C04B22/16C04B2103/40
Inventor 聂珊崔培强田孝武赵守阳蔡悟阳刘飞田沙沙
Owner 葛洲坝武汉道路材料有限公司