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Single-grading-particle-size steel slag permeable asphalt mixture

A permeable asphalt, single-graded technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems that affect the anti-skid performance of the road surface and driving safety, high noise, and affect the ground ecosystem. Achieve the effect of realizing high value-added reuse, protecting the geological environment, and enriching application channels

Active Publication Date: 2016-10-26
西安华清科教产业(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of pavement has the characteristics of high strength, water stability, low-temperature crack resistance, and durability, but poor high-temperature stability, loud noise, compactness, and impermeability.
Due to its imperviousness, the urban groundwater cannot be supplemented by rainfall; it affects the ecological system on the ground and breaks the balance of the urban ecological system; a large amount of rainwater collects on the road surface, causing urban traffic congestion and increasing the flood control pressure of the urban drainage system; intensive asphalt distribution Concrete is used as an anti-skid surface layer, and the water on the road is too late to drain away, which is easy to cause water mist, glare, and "drifting" when motor vehicles pass, which seriously affects the anti-skid performance of the road surface and driving safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare 2.36-4.75mm single-graded steel slag particle aggregates and four kinds of fillers: steel slag micropowder, fly ash, cement, and rock mineral powder for backup;

[0021] Based on the total weight of a Marshall test piece as 100%, weigh steel slag particle aggregates with a gradation specification of 2.36 to 4.75 mm, weigh 86.14%, 85.88%, 85.62%, and 85.35% of the steel slag particle aggregates, and weigh them with 7.5 % of fillers (steel slag powder, rock mineral powder, fly ash and composite cement) were mixed, dried in an oven at 170°C to constant weight, poured into the mixing equipment, and added 0.3% high modulus agent Stir evenly for 180s, then add 6.06%, 6.32%, 6.58% and 6.85% rubber asphalt respectively, and mix evenly for 180s.

[0022] The above-mentioned steel slag is obtained from the refractory material discharged from the converter steel slag of Shaanxi Longgang Co., Ltd. after being aged for one year under natural conditions through preliminary gr...

Embodiment 2

[0024] Prepare 4.75-9.5mm gradation steel slag particle aggregates and four kinds of fillers: steel slag micropowder, fly ash, cement, and rock mineral powder, for backup;

[0025] Taking the total weight of a Marshall test piece as 100%, weigh steel slag particle aggregates with a gradation specification of 4.75 to 9.5 mm, weigh 86.14%, 85.88%, 85.62%, and 85.35% of the steel slag particle aggregates, and weigh them with 7.5 % of fillers (rock ore powder, steel slag powder, composite cement and fly ash) were mixed, dried in an oven at 170°C to constant weight, poured into the mixing equipment, and added 0.3% of high modulus agent Stir evenly for 180s, then add 6.06%, 6.32%, 6.58% and 6.85% rubber asphalt respectively, and mix evenly for 180s.

[0026] The above-mentioned steel slag is obtained from the refractory material discharged from the converter steel slag of Shaanxi Longgang Co., Ltd. after being aged for one year under natural conditions through preliminary grinding i...

Embodiment 3

[0028] Prepare steel slag granular aggregates with 9.5-13.2mm gradation specifications and four kinds of fillers, steel slag micropowder, fly ash, cement, and rock ore powder for backup;

[0029] Taking the total weight of a Marshall specimen as 100%, weigh the 9.5-13.2mm gradation specification steel slag granular aggregates, respectively weigh 86.14%, 85.88%, 85.62%, 85.35% of the steel slag granular coarse aggregates, and mix them with 7.5% of fillers (fly ash, composite cement, steel slag powder and rock ore powder) are mixed, dried in a 170°C oven to constant weight, poured into the mixing equipment, and added with 0.3% high modulus The agent was uniformly mixed for 180s, and then 6.06%, 6.32%, 6.58% and 6.85% of rubber asphalt were added respectively, and the mixture was uniformly mixed for 180s.

[0030] The above steel slag is made from the refractory steel slag of Shaanxi Longgang Company after being aged for one year under natural conditions, and its apparent relativ...

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Abstract

The invention provides a single-grading-particle-size steel slag permeable asphalt mixture which is formed by mixing an aggregate, a high-modulus agent and rubber asphalt. The aggregate consists of single-grading-particle-size steel slag and a packing, the particle sizes of the single-grading-particle-size steel slag are 2.36-4.75 mm, 4.75-9.5 mm, 9.5-13.2 mm and 13.2-16 mm respectively, the packing is rock mineral powder, fine steel slag powder, composite cement or pulverized fuel ash, the contents of the groups of the single-grading-particle-size steel slag and the packing in Marshall test pieces are 84.40-86.14% and 7.5% respectively, and the asphalt-aggregate ratio of the steel slag permeable asphalt mixture is designed to be 6.4, 6.7, 7.0 and 7.3 respectively. The single-grading-particle-size steel slag is used for replacing parts or whole of the aggregate, the high-modulus agent and the rubber asphalt are added, the porosity of the prepared steel slag permeable asphalt mixture meets the requirements, and the single-grading-particle-size steel slag permeable asphalt mixture has higher Marshall stability, smaller analysis leakage loss and cantabro flyoff rate.

Description

technical field [0001] The invention belongs to the technical field of road building materials, in particular to a single-graded steel slag permeable asphalt mixture. Background technique [0002] With the continuous development of our country's economy, the construction of highways has also developed 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 asphalt concrete pavement with a small design void ratio. This kind of pavement has the characteristics of high strength, water stability, low temperature crack resistance, and durability, but poor high temperature stability, loud noise, compactness, and impermeability. Due to its imperviousness, the urban groundwat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B18/14
CPCC04B26/26C04B2111/0075C04B24/00C04B18/142C04B18/08C04B14/02C04B2103/0045Y02W30/91
Inventor 刘文欢李辉朱绘美徐帅杨沛浩张少杰徐品晶胥明琳
Owner 西安华清科教产业(集团)有限公司
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