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Warm mix additive for asphalt mixture and preparation method thereof

A kind of asphalt mixture and additive technology, which is applied in the direction of building insulation materials, building components, buildings, etc., can solve the problem of low temperature tensile and brittle crack resistance of asphalt mixture, reduce the viscosity of modified asphalt at 175°C, and reduce the high temperature of asphalt Viscosity and other problems, to achieve the effect of reducing shear viscosity, strengthening mutual bonding force and prolonging service life

Active Publication Date: 2018-12-21
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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  • Warm mix additive for asphalt mixture and preparation method thereof
  • Warm mix additive for asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The mass percent of asphalt mixture warm mix additives is:

[0046] Powdered solids (including 70wt% inorganic components and 30wt% organic components): 82.6wt%;

[0047] Comb branched polybutadiene (molecular weight 6000): 2.5 wt%;

[0048] Fatty alcohol polyoxyethylene ether: 0.8wt%;

[0049] Rosin acid: 8.6wt%;

[0050] Zinc stearate: 5.5 wt%.

[0051] The preparation method of the powdery solids described in this example is as follows: oily sludge (wherein the oil content is 43wt%, and the solid content is 48wt%) is sent into the centrifuge, and at the same time, the flocculant, namely cocamide, is added to the centrifuge A mixture of propyl betaine and lignosulfonate (the mass ratio of the two is 2:1), the flocculant is added so that the final powdery solid contains 0.6wt% flocculant, and the oily sludge enters the extraction after centrifugation Process; the centrifuged oily sludge and the extractant are mixed according to the mass ratio of 1:40, and the press...

Embodiment 2

[0054] The mass percent of asphalt mixture warm mix additives is:

[0055] Powdered solids (including 70wt% inorganic components and 30wt% organic components): 59.3wt%;

[0056] Star branched styrene / butadiene copolymer (molecular weight 8600): 9.7 wt%;

[0057] Alkanolamide polyoxyethylene ether: 5.2 wt%;

[0058] Rosin acid: 3.8wt%;

[0059] Magnesium stearate: 22wt%.

[0060] The preparation method of the powdery solids described in this example is as follows: oily sludge (wherein the oil content is 43wt%, and the solid content is 48wt%) is sent into the centrifuge, and at the same time, the flocculant, namely cocamide, is added to the centrifuge A mixture of propyl betaine and lignosulfonate (the mass ratio of the two is 2:1), the flocculant is added so that the final powdery solid contains 0.6wt% flocculant, and the oily sludge enters the extraction after centrifugation Process; the centrifuged oily sludge and the extractant are mixed according to the mass ratio of 1:...

Embodiment 3

[0063] The mass percent of asphalt mixture warm mix additives is:

[0064] Powdered solids (among them, inorganic components 65wt%, organic components 35wt%): 78.9wt%;

[0065] Star branched polystyrene / (molecular weight 16500): 2.0 wt%;

[0066] Glyceryl monostearate: 2.3wt%

[0067] Rosin acid: 6.1wt%;

[0068] Cadmium stearate: 10.7wt%.

[0069] Put the powdery solids, star branched polystyrene, glyceryl monostearate, abietic acid, and cadmium stearate into the twin-screw extruder according to the proportioning ratio. The mixing temperature is 105°C, and the mixture is uniformly extruded. The finished product is granulated to obtain warm mix additive for asphalt mixture.

[0070] The preparation method of the powdery solids described in this example is as follows: send the oily sludge (in which the oil content is 69wt%, and the solid content is 24wt%) into the centrifuge, and at the same time add flocculant, namely fatty alcohol, to the centrifuge Polyoxyethylene ether...

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Abstract

The invention discloses a bituminous mixture warm mixing additive and a preparation method thereof. The bituminous mixture warm mixing additive is prepared from, by weight, 44%-92.5% of powdery solids, 1%-10% of branched polymers, 0.5%-6% of lubrication components, 2%-15% of abietic acid and 4%-25% of stearate. The preparation method comprises the following steps that the powdery solids, the branched polymers, the lubrication components, abietic acid and stearate are put into a screw extruder in proportion and mixed to be uniform, a finished product is extruded and pelleted, and the bituminous mixture warm mixing additive is obtained. According to the bituminous mixture warm mixing additive, the powdery solids generated after extraction treatment of oily sludge are fully recycled and can be used for producing a bituminous mixture by replacing mineral powder, cost is reduced, environmental pollution is reduced, a use method is simple, the application range is wide, and the economization and environmental protection idea is met.

Description

technical field [0001] The invention relates to a method for preparing warm-mix additives for asphalt mixtures, in particular to a method for preparing warm-mix additives for asphalt mixtures by using powdery solids produced after thermal extraction of oily sludge. 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 w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/00C08L71/02C08K13/08C08K11/00C08K3/36C08K3/22C08K5/09C08K5/098C04B26/26
CPCY02A30/30
Inventor 杨飞飞陈闯回军李宝忠
Owner CHINA PETROLEUM & CHEM CORP
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