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A kind of low temperature cracking resistant asphalt and preparation method thereof

A low-temperature, asphalt-resistant technology, applied in building thermal insulation materials, building components, buildings, etc., can solve problems such as poor desulfurization and degradation effect, scorch of rubber, affecting product performance, etc., to achieve small G*sinδ and production efficiency. High, short processing time effect

Active Publication Date: 2016-11-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The twin-screw extruder belongs to the category of the internal mixer, and it is easy to cause scorching of the rubber material at a higher temperature. When the temperature is low, the desulfurization and degradation effects are not good, which affects the performance of subsequent products.

Method used

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  • A kind of low temperature cracking resistant asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The ratio of the rubber particles of the anti-cracking asphalt composition is as follows:

[0034] 30 mesh rubber powder 89%

[0035] Furfural Extract Oil 8%

[0036] Organic boron surfactant SB-181 (Qingdao Siwei) 3%

[0037] The proportion of anti-crack bitumen composition is as follows:

[0038] Rubber particles 13%

[0039] Base bitumen 87%

[0040] The preparation process is as follows:

[0041] (1) Heat and melt furfural oil (8%) at 120°C, then add surfactant (3%) and stir evenly. The rubber powder (89%) is pre-soaked in oil by spraying. Then thin pass 110 times under the conditions of roll temperature 40°C and roll distance 0.8 mm, and then crushed into rubber particles with a diameter of 0.1-0.5 cm.

[0042] (2) Heat the Zhenhai base asphalt with a penetration (25°C) of 95 1 / 10mm to 165-175°C, add rubber particles and perform high-shear grinding for 10 minutes to obtain the crack-resistant asphalt composition of the present invention.

Embodiment 2

[0044] The ratio of the rubber particles of the anti-cracking asphalt composition is as follows:

[0045] 60 mesh rubber powder 85%

[0046] Minus 10% of oil extracted from the fourth line

[0047] Organic boron surfactant SPE-1 (Qingdao Siwei) 5%

[0048] The proportion of anti-crack bitumen composition is as follows:

[0049] Rubber particles 15%

[0050] Base bitumen 85%

[0051] The preparation process is as follows

[0052] (1) Heat and melt the minus four-line extraction oil (10%) at 120°C, then add surfactant (5%) and stir evenly. The rubber powder (85%) is pre-soaked in oil by spraying. Then thin pass 140 times under the conditions of roller temperature 60°C and roller distance 0.6mm, and then crushed into rubber particles with a diameter of 0.1-0.5cm.

[0053] (2) Heat Zhenhai base asphalt with a penetration (25°C) of 115 to 160°C-170°C, add 15% rubber particles and grind for 5 minutes under high shear to obtain a crack-resistant asphalt composition. The prope...

Embodiment 3

[0055] The composition formula is the same as that in Example 2, except that the rubber particles obtained after three-roll thin pass crushing are further subjected to microwave activation treatment. Treatment conditions: microwave power 1000W, microwave frequency 2000MHz, activation time 30 seconds.

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Abstract

The invention discloses low-temperature resistant anti-cracking asphalt and a preparation method thereof. The low-temperature resistant anti-cracking asphalt comprises the following components in percentage by weight: 85-90% of matrix asphalt, and 10-15% of rubber particles, wherein the rubber particles comprise the following components in percentage by weight: 80-88% of a rubber powder, 6-10% of a plasticizer, and 2-5% of an organic boron activator. Oil immersion is performed on the rubber powder which is the composition of the anti-cracking asphalt by the plasticizers mixed with the organic boron activators in advance, and then mechanical thin-passing treatment is performed on the treated rubber powder by a three-roller grinder so as to recover the plasticity of the rubber particles. The prepared modified asphalt has the advantages that the medium-temperature anti-fatigue anti-cracking factor Gsin delta is smaller than 5000 kilopascal, the low-temperature performance satisfies PG-34, the creep stiffness is small, the creep rate is high, and the anti-cracking performance is good.

Description

technical field [0001] The invention relates to a road material, in particular to a low-temperature cracking-resistant modified asphalt and a preparation method thereof. Background technique [0002] Asphalt concrete pavement cracks are mainly divided into two types: one is load-type cracks. Under the action of vehicle loads, tensile stress is generated at the bottom of the semi-rigid base. If the tensile stress is greater than the tensile strength of the asphalt mixture, the pavement cracks. The other is non-load cracks, low-temperature shrinkage cracks and temperature fatigue cracks dominated by temperature cracks. [0003] For load-type cracks, cracks can be reduced and eliminated by pavement structural layer design and other measures, but for non-load-type cracks, such as temperature shrinkage cracks and temperature fatigue cracks, it is necessary to use asphalt with excellent fatigue resistance and low temperature resistance to prevent pavement cracks produce. Due to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08K5/55C04B26/26
Inventor 张建峰刘树华郭皎河傅丽姚汉荣
Owner CHINA PETROLEUM & CHEM CORP
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