Mineral powder for bituminous mixture and production method thereof

A technology for an asphalt mixture and a production method, which is applied in the field of mineral powder for asphalt mixture and its production, can solve the problems of increasing labor and equipment costs, difficult to guarantee quality, and many control points, and avoid equipment and labor costs. , cost saving, simple production process

Inactive Publication Date: 2012-10-17
HUNAN ZHONGDA CONSTR ENG TESTING TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are that the process is complex, the temperature requirements are high, there are many control points, the quality is difficult to guarantee, and manual feeding or adding a special feeding equipment will increase labor and equipment costs.
The disadvantage of SMA is that it is expensive

Method used

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  • Mineral powder for bituminous mixture and production method thereof

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Embodiment

[0014] The raw materials are mixed and crushed until the particle size is less than 0.6mm, among which the particle size of less than 0.3mm is not less than 90%, and the particle size of less than 0.075mm is not less than 75%, so as to obtain the finished mineral powder with the same composition ratio as the raw materials. The raw materials are: limestone 100kg, diatoms 5kg-10kg of soil, 5kg-10kg of water-repellent, and 5kg-10kg of polymer used to modify the finished asphalt mixture. The diatomite in the finished mineral powder is 5% to 10% of the weight of the limestone, and the water repellent is 5% to 10% of the weight of the limestone. The polymers used to modify the finished asphalt mixture are optional components: 5% to 10% of the weight of limestone; add the above mineral powder to the asphalt mixture according to 3% to 10% of the mass of the asphalt mixture. Dry mixing temperature is about 170-190 degrees, dry mixing until uniform, oil-stone ratio and gradation remain ...

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Abstract

The invention provides mineral powder for a bituminous mixture and a production method of the mineral powder. The mineral powder provided by the invention consists of limestone and an admixture. The admixture comprises a water repellent and diatomaceous earth, and further comprises a modified polymer for modifying a product of the bituminous mixture. The water repellent, the diatomaceous earth and the modified polymer all take up 5-10% of the weight of the limestone. The production method of the mineral powder provided by the invention comprises the steps of: placing and smashing the limestone and the admixture by a smashing device to a certain granularity to obtain finished product of the mineral powder which is same in proportion with raw materials; during production of the bituminous mixture, replacing the mineral powder with current mineral power and a modifier, and adding 3-10% of the mineral powder by weight to the bituminous mixture. The mineral powder is simple in production process and environment-friendly, and the pavement performance is improved and the cost is lowered when the mineral powder is used in the bituminous mixture.

Description

technical field [0001] The invention relates to a mineral powder for asphalt mixture and a production method thereof. Background technique [0002] Asphalt mixture is artificially selected with a certain grade of mineral materials (crushed stone or crushed gravel, stone chips or sand, mineral powder, etc.) and a certain proportion of road asphalt materials, and mixed under strictly controlled conditions. made mixture. Asphalt materials for road use can be added with external admixtures, such as adding anti-rutting agent, SBS modifier, etc. to improve the performance of asphalt mixture. SBS modified asphalt has good high temperature resistance, low temperature resistance, water stability and better Excellent anti-rutting, anti-fatigue, anti-skid ability, good elasticity and toughness, can reduce the permanent deformation of the road surface, enhance the bearing capacity of the road surface, reduce asphalt aging and damage caused by vehicle leakage of diesel, engine oil and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/28
Inventor 谢乘勇郭棋武杜金龙彭述权胡泽超
Owner HUNAN ZHONGDA CONSTR ENG TESTING TECH
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