Waterproof composite regenerative road graded broken stone hardcore material and graded broken stone hardcore

A technology of graded crushed stone and composite regeneration, which is applied in roads, roads, buildings, etc., can solve problems such as unsatisfactory adaptability, and achieve the effects of reducing construction funds, controllable pollution performance, and small environmental pollution

Active Publication Date: 2021-05-28
SHANDONG TRANSPORTATION INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fully flexible long-life pavement requires a graded crushed stone cushion that has high mechanical properties and must also be flexible. Therefore, some semi-rigid or rigid cushions solidified with active substances such as cement are used in such pavement structures. The adaptability is not ideal

Method used

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  • Waterproof composite regenerative road graded broken stone hardcore material and graded broken stone hardcore
  • Waterproof composite regenerative road graded broken stone hardcore material and graded broken stone hardcore
  • Waterproof composite regenerative road graded broken stone hardcore material and graded broken stone hardcore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Raw materials

[0041] Sintering red mud: no more than 0.075mm;

[0042] Asphalt milling material: (0-4.75mm) files;

[0043] Water stable milling material: (4.75mm-10mm) file and (10mm-30mm) file combination.

[0044] Gravel cushion material gradation control is as follows:

[0045]

[0046] Among them, the mass ratio of water-stabilized milling material (10mm-30mm): water-stabilizing milling material (5mm-10mm): asphalt milling material (0-4.75mm): sintering red mud is 37:29:29:5.

[0047] 2. Paving test

[0048] According to the frost resistance design of the road in the test area, a single layer can meet the freezing depth requirement. Lay a layer of composite recycled graded gravel cushion with a thickness of 20cm on the rolled subgrade. After the cushion pavement is completed, the measured result of the subgrade rebound modulus on the road surface is 230MPa, which meets the requirement of not less than 150MPa.

Embodiment 2

[0050] 1. Raw materials

[0051] Sintering red mud: no more than 0.075mm;

[0052] Asphalt milling material: (0-4.75mm) files;

[0053] Water stabilized milling material: (4.75mm-10mm) file, (10mm-30mm) file combination.

[0054] Gravel cushion material gradation control is as follows:

[0055]

[0056] Among them, the mass ratio of water-stabilized milling material (10mm-30mm): water-stabilizing milling material (4.75mm-10mm): asphalt milling material (0-4.75mm): sintering red mud is 37:34:24:5 .

[0057] 2. Paving test

[0058] The paving test method is the same as in Example 1. After the cushion pavement is completed, the measured result of the subgrade rebound modulus on the road surface is 214MPa, which meets the requirement of not less than 150MPa.

Embodiment 3

[0060] 1. Raw materials

[0061] Sintering red mud: no more than 0.075mm;

[0062] Water stabilized milling material: (0-4.75mm) files;

[0063] Water stable milling material: (4.75mm-15mm) file and (15mm-30mm) file combination.

[0064] Gravel cushion material gradation control is as follows:

[0065]

[0066]

[0067] Among them, the mass ratio of water-stabilized milling material (10mm-30mm): water-stabilized milling material (4.75mm-10mm): water-stabilized milling material (0-4.75mm): sintering red mud is 37:29:29: 5.

[0068] 2. Paving test

[0069] The paving test method is the same as in Example 1. After the cushion pavement is completed, the measured result of the subgrade rebound modulus on the road surface is 191MPa, which meets the requirement of not less than 150MPa.

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Abstract

The invention discloses a waterproof composite regenerative road graded broken stone hardcore material and a graded broken stone hardcore, and belongs to the field of road engineering. The waterproof composite regenerative road graded broken stone hardcore material is characterized by comprising a composite recycled graded broken stone hardcore, a high-milling-material-mixing-amount hot mix plant recycled asphalt mixture flexible base layer, a medium-high-milling-material-mixing-amount hot mix plant recycled lower surface layer, a conventional-milling-material-mixing-amount middle surface layer and a conventional-milling-material-mixing-amount surface layer, the composite recycled graded broken stone hardcore, the high-milling-material-mixing-amount hot mix plant recycled asphalt mixture flexible base layer, the medium-high-milling-material-mixing-amount hot mix plant recycled lower surface layer, the conventional-milling-material-mixing-amount middle surface layer and the conventional-milling-material-mixing-amount surface layer are sequentially paved on the rolled roadbed from bottom to top. Compared with the prior art, the thermal regeneration asphalt pavement structure has the characteristics of low cost, long service life, short construction period and the like, and has good popularization and application values.

Description

technical field [0001] The invention relates to the field of road engineering, and specifically provides a waterproof composite regenerative road graded gravel cushion material and a graded gravel cushion. Background technique [0002] With the rapid development of China's highways in recent years, the road network structure has gradually formed. With the increase in traffic volume and the increase in the service life of roads, some roads need to be repaired or expanded, which will inevitably produce a large amount of waste pavement materials. Mainly Mainly waste asphalt pavement materials and waste water stabilization materials, how to realize the recycling of these materials is an urgent problem to be solved. [0003] Graded crushed stone is generally used as the cushion or flexible base of the road, which can effectively protect the roadbed from the influence of water and freezing, can effectively reduce the height of the groundwater level, and make the road meet the requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04E01C3/06
CPCE01C3/003E01C3/04E01C3/06
Inventor 董昭周洋洋王光勇郝继刚姜维亮胡超柳久伟姚宏达徐书东刘宁孙强赵玉棣孙悦王相龙吴国敬韦金城姚爱超侯雷宋建建张明迪李延波杜菲
Owner SHANDONG TRANSPORTATION INST
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