Warm mix asphalt and preparation method thereof

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...

Examples

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.

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...

Examples

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.