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Self temperature adjustment cold mixing bituminous concrete and preparation method thereof

A kind of asphalt concrete, warm and cold technology, applied in the direction of road, road repair, road, etc., can solve the problem of lack of detailed information, no mention of high temperature rutting on asphalt pavement, etc., achieve simple process, prevent high temperature rutting deformation and asphalt aging, prevent The effect of high temperature rutting

Active Publication Date: 2011-07-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 101029216A "A self-regulating road phase change material and its production method" refers to the use of PCM to store and release solar energy and regulate the temperature of the road surface, so as to avoid the hidden danger of frost on the road surface in winter and cracks caused by freezing, and improve road driving safety, but There is no specific reference to asphalt pavement, nor is it mentioned to solve the high temperature rutting of asphalt pavement
When introducing the application field of PCM, it is mentioned that asphalt pavement containing PCM can prevent roads and bridges from icing, but there is a lack of detailed information

Method used

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  • Self temperature adjustment cold mixing bituminous concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Self-regulating cold-mix asphalt concrete, which is prepared from aggregates, fillers, composite phase change materials, water and modified emulsified asphalt raw materials, the weight percentage of each raw material is: aggregate 80%, filler 1%, composite phase Variable material 5%, water 8%, modified emulsified asphalt 6%.

[0025] The aggregate is hard, wear-resistant, free of soil impurities, and the sand equivalent is greater than 65%. matching requirements. The aggregates used were graded as follows:

[0026] Sieve hole(mm)

9.5

4.75

2.36

1.18

0.6

0.30

0.15

0.075

Passing rate(%)

100

77.6

57.4

42.4

30.3

21.2

11.8

7.1

[0027] The filler is slaked lime.

[0028] The composite phase change material is made of paraffin and expanded graphite (wherein paraffin is used as a phase change substance, and expanded graphite is used as a support carrier), the mass ratio of ...

Embodiment 2

[0036] The preparation method of self-regulating cold asphalt concrete, it comprises the steps:

[0037] 1) According to the percentage by weight of each raw material: aggregate 75%, filler 2%, composite phase change material 7%, water 9%, modified emulsified asphalt 7%, select aggregate, filler, composite phase change material, water And modified emulsified asphalt, spare;

[0038] The aggregate is hard, wear-resistant, free of soil impurities, and has a sand equivalent of more than 65%. distribution requirements;

[0039] The filler is P.O.42.5 Portland cement;

[0040] The composite phase change material is made of paraffin and expanded graphite (wherein paraffin is used as a phase change substance, and expanded graphite is used as a support carrier), the mass ratio of expanded graphite to paraffin is 1: 8.5, and the phase change of the composite phase change material The temperature is 40-50°C, and the phase change heat is (150-160) kJ / kg;

[0041] The modified emulsif...

Embodiment 3

[0046] The preparation method of self-regulating cold asphalt concrete, it comprises the steps:

[0047]1) According to the percentage by weight of each raw material: aggregate 73%, filler 2%, composite phase change material 8%, water 9%, modified emulsified asphalt 8%, select aggregate, filler, composite phase change material, water And modified emulsified asphalt, spare;

[0048] The aggregate is hard, wear-resistant, free of soil impurities, and has a sand equivalent of more than 65%. distribution requirements;

[0049] The filler is P.O.42.5 Portland cement;

[0050] The composite phase-change material is made of paraffin and expanded graphite (wherein paraffin is used as a phase-change substance, and expanded graphite is used as a support carrier), the mass ratio of expanded graphite to paraffin is 1:8, and the phase change of the composite phase-change material is The temperature is 40-50°C, and the phase change heat is (150-160) kJ / kg;

[0051] The modified emulsifi...

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Abstract

The invention belongs to the technical of bituminous pavement maintenance materials, and particularly relates top a cold mixing bituminous concrete and a preparation method thereof. The self temperature adjustment cold mixing bituminous concrete is characterized by being prepared from the following raw mateirals in percentage by weight: 70-80 percent for the aggregate, 1-3 percent for the filler, 5-10 percent for the composite phase change material, 8-10 percent for water and 6-8 percent for the modified emulsified asphalt. The composite phase change material is made of wax and expanded graphite composited together, the mass ratio of the expanded graphite and the wax is 1:8-9, the phase change temperature of the composite phase change material is 40-50 DEG C, and the phase change heat is 150-160kJ / kg. The process is simple, the cost is low and implementation is easy. The concrete has the function of reducing pavement temperature.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement maintenance materials, in particular to a cold-mix asphalt concrete and a preparation method thereof. Background technique [0002] Rutting is the unique, most common and most harmful form of damage to asphalt pavement. It causes as much as 80% of the pavement damage, which not only seriously affects the performance and service quality of the pavement, but also easily leads to traffic accidents. Over the years, scholars at home and abroad have conducted a large number of theoretical analysis and experimental research in terms of pavement structure, material composition design, rutting control indicators, etc., and have achieved certain results. However, with the growth of highway traffic, the increase of overloaded and heavy-duty vehicles, the formation of channelized traffic and global warming, the rutting problem is still a worldwide problem. [0003] High temperature on the road surfa...

Claims

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Application Information

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IPC IPC(8): E01C19/10
Inventor 陈美祝吴少鹏万路徐光霁洪晶
Owner WUHAN UNIV OF TECH
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