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Foam warm-mixing SMA-13 asphalt mixture, preparation method and performance evaluation method thereof

An asphalt mixture and foam technology, which is applied in ceramic products, applications, climate change adaptation, etc., can solve the problem of not giving full play to the warm mix asphalt technology, energy saving and emission reduction, unstable road performance of the mixture, and imperfect additive evaluation methods, etc. problems, to reduce the temperature, reduce the degree of aging, reduce the generation of harmful gases

Inactive Publication Date: 2016-11-09
JSTI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application process of the existing warm mix technology, the design method of hot mix asphalt mixture is still used, and the advantages of energy saving and emission reduction of warm mix asphalt technology are not fully utilized
At the same time, the old pavement materials are discarded during the renovation and maintenance of the existing old pavement, causing environmental pollution
[0003] Most of the existing warm mixing technology adopts organic additive warm mixing technology. Because the additive warm mixing technology increases production costs, the additive evaluation method is not perfect, and the road performance of the mixture is unstable. At this stage, it is urgent to study a cost-reducing method. , non-polluting warm mixing technology

Method used

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  • Foam warm-mixing SMA-13 asphalt mixture, preparation method and performance evaluation method thereof
  • Foam warm-mixing SMA-13 asphalt mixture, preparation method and performance evaluation method thereof
  • Foam warm-mixing SMA-13 asphalt mixture, preparation method and performance evaluation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Foam warm mix SMA-13 ​​asphalt mixture composition (parts by weight) of the present invention:

[0026] 1) Mineral material: 400 parts of 1# material, 340 parts of 2# material, 50 parts of 3# material, 110 parts of 4# material, 100 parts of mineral powder;

[0027] 2) Foamed asphalt: 61 parts of SBS modified asphalt, 1.83 parts of foaming water.

[0028] The production equipment that the foam warm mix SMA-13 ​​asphalt mixture of the present invention adopts is:

[0029] 1) The foamed asphalt production equipment can guarantee the maximum air pressure of 1000kPa, the maximum water pressure of 1000kPa, and the asphalt pressure of 1000kPa. It can adapt to the asphalt temperature of 155-165°C, and can continuously produce foamed asphalt under a certain amount of water, and The quality of foamed asphalt produced in each batch can reach 10-20kg;

[0030] 2) Use a horizontal mixing pot that matches the foaming equipment. It is required that the horizontal mixing pot can meet...

Embodiment 2

[0039] Composition of foam warm mix recycled asphalt mixture (parts by weight):

[0040] 1) Mineral material: 430 parts of 1# material, 320 parts of 2# material, 50 parts of 3# material, 90 parts of 4# material, 110 parts of mineral powder;

[0041] 2) Foamed asphalt: 60 parts of SBS modified asphalt, 1.8 parts of foaming water.

[0042] Indoor production equipment is the same as embodiment 1.

[0043] The preparation method of the foam warm mix SMA-13 ​​asphalt mixture comprises the following steps:

[0044] 1) Put the heated coarse aggregate, fine aggregate, and lignin fiber in a mixing pot, and mix properly with a small shovel.

[0045] 2) Spray the foamed modified asphalt foamed in the room directly into the mixing pot, and fully mix the SMA-13 ​​mixture (120°C~160°C) for 1-2min.

[0046] 3) Suspend mixing, add heated mineral powder, continue mixing until uniform, and keep the asphalt mixture within the required mixing temperature range, the total mixing time is 4min, a...

Embodiment 3

[0051] Composition of foam warm mix recycled asphalt mixture (parts by weight):

[0052] 1) Mineral material: 370 parts of 1# material, 360 parts of 2# material, 60 parts of 3# material, 120 parts of 4# material, 90 parts of mineral powder;

[0053] 2) Foamed asphalt: 61 parts of SBS modified asphalt, 1.83 parts of foaming water.

[0054] Indoor production equipment is the same as embodiment 1.

[0055] The preparation method of the foam warm mix SMA-13 ​​asphalt mixture comprises the following steps:

[0056] 1) Put the heated coarse aggregate, fine aggregate, and lignin fiber in a mixing pot, and mix properly with a small shovel.

[0057]2) Spray the foam-modified asphalt foamed in the room directly into the mixing pot, and fully mix the SMA-13 ​​mixture (130℃~160℃) for 1-1.5min.

[0058] 3) Suspend mixing, add heated mineral powder, continue mixing until uniform, and keep the asphalt mixture within the required mixing temperature range, the total mixing time is 3 to 4 mi...

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Abstract

The invention discloses a foam warm-mixing SMA-13 asphalt mixture, a preparation method and a performance evaluation method thereof. The preparation method comprises the following steps: performing mechanical foaming processing on the modified asphalt to prepare the foam-modified asphalt; screening an aggregate, taking the required grade of a coarse aggregate and a fine aggregates; mixing the selected aggregates, adding flocculent lignin fibers and the foam-modified asphalt, and uniformly stirring the material to obtain a target product. Middle-high temperature asphalt, gas and water are simultaneously introduced into an asphalt foaming apparatus for rapid vaporization, foam asphalt is generated through rapid expansion, volume of the formed asphalt is temporarily increased, and the viscosity is temporarily minimized, the aggregates can be fully coated under low temperature, workability is increased, mixing temperature of the foam warm-mixing SMA-13 asphalt mixture is reduced from the temperature of 180-185 DEG C to about 160 DEG C, mixing temperature is reduced, and aging degree of the SMA-13 asphalt mixture is reduced, and the generation of the harmful gas is reduced.

Description

technical field [0001] The invention relates to an asphalt mixture for roads, in particular to a foam warm mix SMA-13 ​​asphalt mixture, a preparation method and a performance evaluation method. Background technique [0002] With the vigorous development of the green transportation system and the strengthening of research and promotion of high-efficiency, environmental-friendly and climate-friendly transportation science and technology, under this background, warm-mix asphalt technology came into being. However, in the application process of the existing warm mix technology, the design method of hot mix asphalt mixture is still used, and the advantages of energy saving and emission reduction of warm mix asphalt technology are not fully utilized. At the same time, the old pavement materials are discarded during the renovation and maintenance of the existing old pavement, causing environmental pollution. [0003] Most of the existing warm mixing technology adopts organic addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/08C04B26/26
CPCC04B26/26C04B38/08C04B2111/0075C04B2201/20C04B14/00C04B16/06Y02A30/30
Inventor 凌晨郑炳锋刘伟吴昊吴春颖单瑞韦武举李强严金海
Owner JSTI GRP CO LTD
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