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Warm mix asphalt and preparation method thereof

A technology of warm-mix asphalt and matrix asphalt, which is applied in building insulation materials, building components, climate change adaptation, etc. It can solve the problem of low-temperature tensile and brittle crack resistance of asphalt mixtures, and reduce the viscosity of modified asphalt at 175°C. Reduce the high-temperature viscosity of asphalt and other problems, and achieve the effects of reducing energy consumption, reducing high-temperature viscosity, and low-temperature viscosity

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The viscosity reducer can reduce the viscosity of modified asphalt at 175°C; the synthetic paraffin in the viscosity reducer is a non-elastic material, which is easy to be brittle under low temperature conditions, resulting in a decrease in the low temperature tensile and brittle crack resistance of the asphalt mixture , and most of the low-melting organic waxes reduce the viscosity of asphalt at high temperature, and also reduce the viscosity at 60°C, reducing the anti-rutting performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The mass percentage of warm mix asphalt raw material is:

[0034] Stearic acid: 0.5%;

[0035] Coconut oil fatty acid diethanolamide: 7.5%;

[0036]Base bitumen: 92.0%.

[0037] Add stearic acid and coconut oil fatty acid diethanolamide into the reaction vessel respectively according to the proportion, stir and raise the temperature to 65°C, and the stirring time is 30 minutes, then add it to the base asphalt according to the proportion, the mixing temperature is 147°C, and the stirring time is 50 minutes , made of warm mix asphalt.

Embodiment 2

[0039] The mass percentage of warm mix asphalt raw material is:

[0040] Stearic acid: 7.2%;

[0041] Coconut oil fatty acid diethanolamide: 2.5%;

[0042] Base bitumen: 90.3%.

[0043] Add stearic acid and coconut oil fatty acid diethanolamide into the reaction vessel respectively according to the proportion, stir and heat up to 70°C, and the stirring time is 20 minutes, then add it to the base asphalt according to the proportion, the mixing temperature is 140°C, and the stirring time is 45 minutes , made of warm mix asphalt.

Embodiment 3

[0045] The mass percentage of warm mix asphalt raw material is:

[0046] Stearic acid: 3.6%;

[0047] Coconut oil fatty acid diethanolamide: 1.2%;

[0048] Base bitumen: 95.2%.

[0049] Add stearic acid and coconut oil fatty acid diethanolamide into the reaction vessel respectively according to the proportion, stir and heat up to 85°C, and the stirring time is 25 minutes, then add it to the base asphalt according to the proportion, the mixing temperature is 135°C, and the stirring time is 35 minutes , made of warm mix asphalt.

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PUM

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Abstract

The invention discloses warm mix asphalt and a preparation method thereof. The warm mix asphalt comprises the following raw materials in percentage by weight: 0.1-10 percent of stearic acid, 0.1-10 percent of cocoanut oil fatty acid diethanolamide, and 80-99.8 percent of matrix asphalt. The preparation method for the warm mix asphalt comprises the following steps: respectively adding the stearic acid and cocoanut oil fatty acid diethanolamide in a reaction vessel according to a ratio, uniformly mixing, adding the mixture in the matrix asphalt according to a ratio, and uniformly mixing to prepare the warm mix asphalt. The warm mix asphalt is environment-friendly, and has a good application prospect in mix asphalt mixing.

Description

technical field [0001] The invention relates to a road asphalt and a preparation method thereof, in particular to a warm-mix asphalt and a preparation method thereof. Background technique [0002] Asphalt mixtures currently used in road engineering are generally divided into two types according to the mixing construction temperature: cold mix asphalt mixture CMA (Cold Mix Asphalt) and hot mix asphalt mixture HMA (Hot Mix Asphalt). Cold-mix asphalt mixture is generally mixed and paved with emulsified asphalt or liquid asphalt and aggregate at room temperature, without heating the aggregate and binder, which can save a lot of energy. However, the initial road performance of cold-mix asphalt mixture is poor, and it is difficult to meet the requirements of important projects such as expressways and heavy-duty traffic roads. Hot mix asphalt mixture is the most widely used mixture with the best road performance. However, in the production process of hot mix asphalt mixture, asph...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K5/09C08K5/20
CPCY02A30/30
Inventor 陈闯范思远陈保莲张静宁爱民李志军程国香
Owner CHINA PETROLEUM & CHEM CORP
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