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A resource treatment method for recycling waste powder in an asphalt concrete mixing station

A technology of asphalt concrete and treatment method, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., and can solve the problem of many ingredients in the formula, unsuitable treatment of waste powder recovered from asphalt concrete mixing plants, and high treatment costs problems, to achieve the effect of simple process, minimized economic cost, and increased economic benefits

Active Publication Date: 2021-04-20
武汉市江夏路桥工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution has many ingredients and high processing costs, so it is not suitable for ordinary road construction companies to process waste powder recovered from asphalt concrete mixing plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for recycling waste powder from asphalt concrete mixing plants, which is carried out according to the following steps: by mass percentage, weigh 4.5% of PCSB curing agent, 20% of asphalt waste powder, 45.5% of fine aggregate, and 30% of coarse aggregate , add water to stir and mix. During the mixing process, the water content is controlled to account for 8.0% of the weight of the mixture. The time from mixing and discharging to the end of molding is ≤4h. Paving or pouring to preset specifications, wet water curing for 7 days, its compressive strength ≥5.5MPa, which meets the requirements of 5.0MPa~7.0MPa for the strength of the base layer of the super-heavy and extremely heavy traffic standard road surface of high-grade highways.

[0029] Wherein, the fine aggregate is stone chips with a particle size of ≤5 mm, and the coarse aggregate is gravel with a particle size of 5-10 mm.

[0030] The asphalt waste powder used is waste powder produced by Lingshan Asphalt ...

Embodiment 2

[0032] A method for recycling waste powder from asphalt concrete mixing plants, which is carried out according to the following steps: by mass percentage, weigh 3.5% of PCSB curing agent, 20% of asphalt waste powder, 46.5% of fine aggregate, and 30% of coarse aggregate , add water to stir and mix. During the mixing process, the water content is controlled to account for 9% of the weight of the mixture. The time from mixing and mixing to the end of molding is ≤4h. Paving or pouring to preset specifications, wet water curing for 7 days, its compressive strength ≥4.0MPa, which meets the requirement of 3.0MPa~5.0MPa for the strength of the sub-base layer of the super-heavy and extremely heavy traffic standard road surface of high-grade highways.

[0033] Wherein, the fine aggregate is stone chips with a particle size of ≤5 mm, and the coarse aggregate is gravel with a particle size of 5-10 mm.

[0034] The waste powder produced by the Wuhan Jiangxia Road and Bridge Engineering Cor...

Embodiment 3

[0036]A method for recycling waste powder from asphalt concrete mixing plants, which is carried out according to the following steps: by mass percentage, weigh 2.5% of PCSB curing agent, 17.5% of asphalt waste powder, 48.5% of fine aggregate, and 31.5% of coarse aggregate , add water to stir and mix. During the mixing process, the moisture content is controlled to account for 5% of the weight of the mixture. The time from mixing and discharging to the end of molding is ≤4h. Paving or pouring to preset specifications, wet water curing for 7 days, its compressive strength ≥4.5MPa, which meets the requirements of 3.0MPa~5.0MPa for the strength of the subbase layer of the super-heavy and extremely heavy traffic standard road surface of high-grade highways.

[0037] Wherein, the fine aggregate is stone chips with a particle size of ≤5 mm, and the coarse aggregate is gravel with a particle size of 5-10 mm.

[0038] The gray waste powder produced by the Lingshan Asphalt Concrete Mixi...

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Abstract

The present invention provides a method for recycling waste powder recovered from asphalt concrete mixing plants, which is characterized in that it comprises the following steps: 1) Weigh the following components by mass percentage: PCSB curing agent 2-8%, asphalt waste powder 15% ~25%, fine aggregate 35~50%, coarse aggregate 25~35%, the sum of the mass percentages of the above components is 100%; 2) add water to the weighed components to form a mixture, control The moisture content is 5% to 10%; 3) The mixture is rolled or compacted into preset specifications, and wet water is cured for 5 to 10 days. The invention can process the recycled waste powder of the asphalt concrete mixing plant into road pavement base material, which not only reduces environmental pollution, but also increases economic benefits and reduces the construction cost of the pavement base.

Description

technical field [0001] The invention belongs to the field of waste recycling, and in particular relates to a resource treatment method for recycling waste powder in an asphalt concrete mixing station. Background technique [0002] During the asphalt concrete mixing process, 8-10 tons of waste powder will be produced for every 100 tons of asphalt concrete produced, which is the waste powder recovered from the asphalt concrete mixing plant (referred to as asphalt waste powder) in the present invention. This kind of asphalt waste powder is some very fine powder, most of which have a particle size of ≤0.075mm and have no direct use value. According to an incomplete survey, there are more than 20 asphalt mixing plants in Wuhan and its surrounding areas, which generate 800,000 to 1,000,000 tons of asphalt waste every year. There are more than 1,000 asphalt concrete mixing plants in the country, and tens of millions of tons of asphalt waste powder are produced every year. Over th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10C04B18/16
CPCC04B18/16C04B28/10C04B2201/50C04B14/06C04B14/303C04B22/06C04B22/066C04B14/308C04B24/24C04B22/00C04B18/12Y02W30/91
Inventor 彭锦红徐世红周翔周晓华陈洁刘军文强周恒胡德富覃青林文丕珍
Owner 武汉市江夏路桥工程有限公司
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