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A Grading Method for Cold Recycled Mixture

A technology of cold recycled mixture and grading, which is applied in roads, road repairs, construction, etc., can solve the problems of low strength, achieve the effect of improving strength, improving utilization rate, and realizing high-efficiency work

Active Publication Date: 2021-08-17
浙江春天建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although asphalt cold recycled mixture technology has been popularized and applied in large quantities, due to the low strength of some existing cold recycled mixtures, it can only be used for rural roads and roads that do not require high road surfaces.

Method used

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  • A Grading Method for Cold Recycled Mixture
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  • A Grading Method for Cold Recycled Mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: A method for grading cold recycled mixtures, wherein the cold recycled mixtures include: 16 parts of basalt stones with a particle size of 20mm-30mm, 50 parts of road milling with a particle size of 0-10mm, granules 30 parts of road milling with a diameter of 10mm-30mm, 2 parts of cement, 2 parts of mineral powder, 3.5 parts of emulsified asphalt, and 3-5 parts of water. The above materials are mixed for asphalt mixture grading, and geotechnical impact tests are carried out for different water contents. The tests are as follows:

[0049] test count Moisture content (%) Maximum dry density (g / cm 3 )

[0050] It can be seen from the above that the optimal water content of the molded cold recycled specimen is 3.8%, and the corresponding maximum dry density is 2.287g / cm 3 .

Embodiment 2

[0051] Embodiment 2: A method for grading cold recycled mixtures, wherein the cold recycled mixtures include: 16 parts of basalt stones with a particle size of 20mm-30mm, 50 parts of road milling with a particle size of 0-10mm, granules 30 parts of road milling with a diameter of 10mm-30mm, 2 parts of cement, 2 parts of mineral powder, 2.5-4.5 parts of emulsified asphalt, and 3.8 parts of water. Mix the above materials for asphalt mixture grading, and conduct splitting experiments for different amounts of emulsified asphalt. The test is as follows:

[0052] test count Amount of emulsified asphalt (%) Dry splitting strength (MPa) Wet splitting strength (MPa) 1 2.5 0.66 0.61 2 3 0.75 0.67 3 3.5 0.76 0.68 4 4 0.72 0.62 5 4.5 0.68 0.63

[0053] It can be seen from the above that the maximum dry splitting strength can be obtained when the mass fraction of the optimum emulsified asphalt is 3.5 phr in the molded cold recycled spe...

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Abstract

The invention belongs to the technical field of asphalt pavement cold regeneration, and in particular relates to a method for grading cold recycled mixtures, the cold recycled mixtures comprising new aggregates, road milling materials, cement, mineral powder, emulsified asphalt and water; wherein In terms of parts by mass, the total parts of the new aggregate, road milling material, cement and mineral powder are 100 parts, the new aggregate is 0-50 parts, and the road milling material is 50-100 parts 1.5-2.5 parts of the cement, 2 parts of the mineral powder, 2.5-4.5 parts of the emulsified asphalt, and 3-5 parts of the water. The production method can not only improve the strength of the pavement, but also effectively improve the utilization rate of the old asphalt pavement and realize the green development of the road.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement cold regeneration, and in particular relates to a gradation method of cold recycled mixture. Background technique [0002] Asphalt pavement cold recycling technology is a road maintenance method, through milling and recycling waste asphalt pavement materials (Reclaimed Asphalt Pavement, RAP for short) and adding new aggregates to meet the gradation design requirements, using cement-emulsified asphalt mortar at room temperature Medium cement hydration, asphalt demulsification produces cohesive force and aggregate cementation enhances cohesive force. Through construction technology and reasonable maintenance, a new flexible structural layer of asphalt mixture is formed, which reduces the generation of reflection cracks and can achieve dense grading hot mixing. The performance index of asphalt mixture has the advantages of resource saving, energy saving, emission reduction, and cost saving; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C19/05E01C19/10C04B28/00
CPCC04B28/00C04B2111/0075C04B2201/20C04B2201/50E01C19/05E01C19/104E01C19/1072C04B14/14C04B18/12C04B24/36C04B22/002C04B18/167
Inventor 詹海强赵永鑫张艺叶朱治
Owner 浙江春天建设有限公司
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