Unlock instant, AI-driven research and patent intelligence for your innovation.

Asphalt modified with desulfurized rubber powder

A technology for desulfurized rubber powder and modified asphalt, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of insufficient compaction of asphalt concrete pavement, easy delamination, and easy damage to the road surface.

Inactive Publication Date: 2005-11-09
WUHAN UNIV OF TECH
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this rubber powder is in a vulcanized state, it can only swell a small amount in asphalt, and the rubber powder exists in asphalt similar to elastic fillers, and has limited modification effect on the high and low temperature properties of asphalt. , the storage stability of modified asphalt is very poor, and rubber powder and asphalt are easily separated
In addition, since the rubber powder has not been dissolved and swelled, it has a certain degree of resilience, which can easily cause insufficient compaction of the asphalt concrete pavement, large void ratio, and the pavement is easy to be damaged

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Asphalt (softening point 46°C, penetration 88dmm) 89.5%, desulfurized rubber powder prepared by high-speed rotary heating method 10%, epoxidized polybutadiene 0.5%. The production method is to heat the asphalt to 180-190°C first, then add desulfurized rubber powder and epoxidized polybutadiene, keep the temperature constant, stir at high speed for 3 hours, and then get desulfurized rubber powder modified asphalt after cooling. . Compared with the undesulfurized rubber powder modified asphalt, the softening point of the modified asphalt increased from 57°C to 59°C, and the ductility at 5°C increased from 8.3cm to 10.5cm. 9.2°C is reduced to 6.5°C, so it has better high and low temperature performance and storage stability.

Embodiment 2

[0017] Asphalt (softening point 44°C, penetration 121dmm) 84.7%, desulfurized rubber powder prepared by dynamic desulfurization method 15%, glycidyl methacrylate 0.3%. Manufacture was carried out according to the manufacturing steps similar to Example 1. Compared with the non-desulfurized rubber powder modified asphalt, the softening point of the obtained modified asphalt increased from 60°C to 63°C, and the ductility at 5°C increased from 12.6cm to 15.5cm. 11.4 °C was reduced to 7.2 °C, showing a better modification effect.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

The present invention relates to asphalt modified with desulfurized rubber powder for road construction. The modified asphalt is produced with desulfurized rubber powder 5-30 wt%, asphalt 70-95 wt% and compatibilizer 0-1.5 wt% and through high speed shearing stirring for grinding in colloid mill. The modifier desulfurizing rubber powder has good dissolving and swelling performance in asphalt and has much active radicals in the surface for bonding with asphalt, and the compatilizer can further increase the interaction between the rubber powder and asphalt, so that the modified asphalt has excellent high and low temperature performance and storage stability.

Description

technical field [0001] The invention relates to a desulfurized rubber powder modified asphalt suitable for road construction. Background technique [0002] Asphalt is an important building material, which has been widely used in road construction, building waterproofing and other fields. However, ordinary asphalt can no longer meet the performance requirements of modern high-grade pavements due to its shortcomings such as brittle cracking at low temperature, softening at high temperature, and poor elasticity. With the development of transportation and the construction of a large number of high-grade highways, the demand for high-performance asphalt is increasing. For this, the asphalt must be modified. Asphalt modification usually improves the heat resistance of asphalt, reduces its low-temperature brittleness, improves its elasticity, plasticity and low-temperature deformation, and increases its damage resistance by adding polymers to asphalt. At present, the polymers us...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00
Inventor 余剑英
Owner WUHAN UNIV OF TECH