Modified asphaltum material and preparation process thereof

A technology for modifying asphalt and asphalt raw materials, which is applied to building insulation materials, building components, buildings, etc., to achieve the effects of superior elastic recovery performance, good high-temperature performance, and strong low-temperature performance

Inactive Publication Date: 2007-08-15
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the reflective cracks, the stress absorbing layer technology is usually used, and the asphalt material used in this technology must have high high temperature stability, low temperature flexibility and elastic recovery ability, and usually requires a softening point greater than 75°C, a ductility greater than 55cm at 5°C, The ductility at 0°C is greater than 30cm, and the elastic recovery is greater than 95%, and after aging, the ductility at 5°C is greater than 45cm, and the elastic recovery is greater than 80%. Bitumen is difficult to meet this requirement

Method used

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  • Modified asphaltum material and preparation process thereof
  • Modified asphaltum material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The mass percentage is: 70% of petroleum pitch, 5% of styrene-isoprene-styrene SIS and 5% of butadiene SB, 3% of crystalline sulfur, 17% of catalytic cracking oil mixed at 150 ° C , high-speed shearing, shearing speed 10000 RPM, time 90min. A modified bitumen with a polymer network structure is obtained.

Embodiment 2

[0025] The mass percentage is: 80% petroleum pitch, 5% styrene-isoprene-styrene SIS and 5% butadiene-styrene block SBR, 5% sulfur powder, 5% solvent The extracted refined oil was mixed at 160°C with high-speed shearing at a shear rate of 15,000 RPM for 60 minutes. A modified bitumen with a polymer network structure is obtained.

Embodiment 3

[0027] The mass percentage is: 85% petroleum pitch, 3% butadiene-styrene block SBR and 4% butadiene SB, 7.5% tall oil, 0.5% inorganic metal oxide at 180 ° C Mixing, high-speed shearing, shearing speed 10000 RPM, time 45min. A modified bitumen with a polymer network structure is obtained.

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PUM

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Abstract

A modified asphalt material used for spreading new pavement on old one and the stress absorbing layer of new pavement is proportionally prepared from raw asphalt, polymer, cross-linking agent and compatilizer through mixing at 150-200 deg.C and high-speed shearing at 10000-20000 rpm for 45-90 min.

Description

technical field [0001] The invention relates to a stress-absorbing layer polymer modified asphalt material based on anti-reflection cracks and a preparation method thereof. Background technique [0002] At present, when the old cement pavement adopts flexible overlay or the old asphalt pavement adopts asphalt overlay technology, the asphalt overlay layer may produce reflection cracks or corresponding cracks due to the disease defect of the underlying layer or the seam of the old cement concrete panel; When the base is rigid, the dry shrinkage and temperature shrinkage of the semi-rigid material will cause cracks in the base, which will be reflected on the asphalt surface. In order to solve the reflective cracks, the stress absorbing layer technology is usually used, and the asphalt material used in this technology must have high high temperature stability, low temperature flexibility and elastic recovery ability, and usually requires a softening point greater than 75°C, a du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L25/08C08K3/22
Inventor 陈拴发陈华鑫王秉纲
Owner CHANGAN UNIV
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