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Modified asphalt and asphalt concrete

A technology for modifying asphalt and asphalt, applied in building components, building insulation materials, building structures, etc., can solve problems such as reflection cracks, and achieve the effect of improving service life, strong anti-reflection crack ability, and strong elastic recovery ability

Inactive Publication Date: 2018-06-01
杭州睿琦化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the asphalt layer is directly added to the old cement concrete pavement, reflection cracks will inevitably appear

Method used

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  • Modified asphalt and asphalt concrete
  • Modified asphalt and asphalt concrete
  • Modified asphalt and asphalt concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Modified asphalt raw materials (parts by weight): 100 parts of asphalt, 7 parts of polypropylene, 3 parts of SBS, 0.9 parts of petroleum resin, 1 part of dimethyl phthalate, 3 parts of flame retardant, 0.3 parts of crosslinking agent, sulfur 0.2 parts.

[0033] The flame retardant is obtained by stirring and mixing aluminum hypophosphite, magnesium hypophosphite, and zinc borate in a mass ratio of 1:1:1.

[0034] The cross-linking agent is obtained by stirring and mixing tetramethylthiuram monosulfide, p-tolualdehyde, and terephthalenedimethanol uniformly in a mass ratio of 1:1:1.

[0035] Modified asphalt preparation:

[0036] (1) Put polypropylene, petroleum resin, and dimethyl phthalate in a high-speed mixer, control the speed of the high-speed mixer at 350 rpm at room temperature, mix for 5 minutes, take it out and transfer it to a twin-screw extruder , Extrude and granulate at 160°C, control the speed of the screw machine at 400 rpm, and obtain modified polypropy...

Embodiment 2

[0041] It is basically the same as in Example 1, except that the flame retardant is obtained by stirring and mixing uniformly magnesium hypophosphite and zinc borate at a mass ratio of 1:1.

Embodiment 3

[0043] It is basically the same as in Example 1, except that the flame retardant is obtained by stirring and mixing aluminum hypophosphite and zinc borate in a mass ratio of 1:1.

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PUM

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Abstract

The invention relates to modified asphalt and asphalt concrete. The modified asphalt is prepared from the following raw materials of: in parts by weight, 95-105 parts of asphalt, 2-9 parts of polypropylene, 1-5 parts of SBS, 0.5-2.5 parts of petroleum resin, 0.5-2.5 parts of dimethyl phthalate, 1-5 parts of flame retardant, 0.1-0.5 part of a cross-linking agent and 0.1-0.5 part of sulphur. The modified asphalt has strong elasticity restorability and large viscosity and toughness, and the asphalt concrete contains the modified asphalt, has strong reflection crack resistance, and can significantly improve the service life of highway pavements, especially pavements of asphalt-laid cement roads.

Description

technical field [0001] The invention relates to the technical field of asphalt modification, in particular to a modified asphalt and asphalt concrete. Background technique [0002] Since the first expressway was built in 1989, my country's expressway has developed rapidly, and by the end of 2010 it had reached 65,000 kilometers, second only to the United States and ranking second in the world. The rapid development and construction of expressways have strengthened the connection between cities, shortened the time of passengers and goods in transit, promoted cultural exchanges in different regions, enhanced the unity among nationalities, and played an important role in promoting the development of the entire national economy. effect. [0003] Most expressways that have been built use semi-rigid base or cement concrete pavement. The semi-rigid base material is sensitive to temperature and humidity changes, and will produce dry shrinkage cracks and temperature shrinkage crack...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L23/12C08L53/02C08L57/02C08K13/02C08K5/12C08K3/06C08K3/32C08K3/38C08K5/40C08K5/07C04B28/00
CPCC04B28/00C08K2003/387C08K2201/014C08L95/00C08L2201/02C08L2205/035C04B24/36C04B18/08C04B14/14C04B24/42C04B14/048C08L23/12C08L53/02C08L57/02C08K13/02C08K5/12C08K3/06C08K3/32C08K3/38C08K5/40C08K5/07
Inventor 肖菲孙斌
Owner 杭州睿琦化工科技有限公司
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