Warm mixed asphalt cement and preparation method thereof

A warm-mix asphalt and binder technology, which is applied to building insulation materials, on-site cohesive pavements, building components, etc., can solve the problems of difficult restoration of asphalt binder performance, reduced bond strength of asphalt mixture, and poor adhesion. Insufficient and other problems, to achieve the effect of improving low-temperature tensile and brittle crack resistance, high-temperature anti-rutting ability, and improving construction workability

Active Publication Date: 2012-07-04
PETROCHINA CO LTD +1
View PDF20 Cites 57 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented new type of heat-plasable (HTP)-based liquid rubber modified emulsion copolymer system can be combined into an effective way for creating better thermal mixes without compromising their durabilities or reducing environmental impact. It also includes various types of hydrocarbon resin crosslinkings like aliphatic amine groups along the backbone of polyethylene gyrantamide (PEG), diamond reinforcement fibers, graphite particles, etc., resulting in enhanced mechanical behavior such as reduced rigidity during cold welding while maintaining excellent flexibility and toughness against repeated use cycles over many years. These improvements result in less cracks forming when exposed to temperatures above room temperature. Additionally, this composition does not harm other materials within the road's surface layer called bituminous layers. Overall, these technical results contribute towards efficient manufacturing processes and long life of pavement products made from them.

Problems solved by technology

Technological Problem addressed in this patented technical problem relates to improves the thermal stability and flexibility of asphaltex compositions while maintaining good cold resistancilage property without compromising upon mechanical characteristics such as elongatility, toughness, fatigue breakdown capacity, heat conductivity, impact resistance, and long term preservative ability.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Warm mixed asphalt cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] a) Weigh No. 50 base asphalt accounting for 95.0w% of the warm-mix asphalt binder, slowly heat it to 150°C, and keep the temperature until it is completely melted, add 0.5w% of the warm-mix asphalt binder to extract oil, 0.5 w% coker wax oil, 1.0w% petroleum resin, 1.0w% stearyl alcohol, 1.0w% stearyl stearate, stir until uniform; b) weigh 1.0w% SBS polymer accounting for warm mix asphalt binder The modifier is added in batches to the mixing system of the above-mentioned base asphalt and the rheology modifier, sheared and stirred until the polymer particles are evenly distributed within the range of <100 μm. c) Slowly raise the temperature to 180°C, stir and react for 2 hours and take out of the pot.

Embodiment 2

[0032] a) Weigh No. 70 base asphalt accounting for 95.0w% of the warm-mix asphalt binder, slowly heat it to 150°C, and keep the temperature constant until it is completely melted, add 0.5w% of the warm-mix asphalt binder to extract oil, 0.5 w% vacuum distillate oil, 1.0w% montan wax, 1w% petroleum resin, 1.0w% pentaerythritol stearate, stir until uniform; b) weigh 1.0w% butadiene rubber BR modification of warm mix asphalt binder agent, added in batches to the mixing system of the above-mentioned base asphalt and rheology modifier, sheared and stirred until the polymer particles are evenly distributed within the range of <100 μm. c) Slowly raise the temperature to 170°C, stir and react for 2 hours and take out of the pot.

Embodiment 3

[0034] a) Weigh No. 90 matrix asphalt accounting for 95.0w% of the warm-mix asphalt binder, slowly heat it to 150°C, and keep the temperature constant until it is completely melted, add 0.5w% of the warm-mix asphalt binder FCC oil slurry, 0.5w% coker wax oil, 1w% Sasobit, 1.0w% stearic acid, 1.0w% ethylene-vinyl acetate, stir until uniform; b) Weigh 1.0w% SBR polymer modifier in warm mix asphalt binder , added in batches to the mixing system of the above-mentioned base asphalt and rheology modifier, sheared and stirred until the polymer particles are evenly distributed within the range of <100 μm. c) Slowly raise the temperature to 180°C, stir and react for 1 hour and take out of the pot.

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

No PUM Login to view more

Abstract

The invention relates to warm mixed asphalt cement and a preparation method thereof. 100 percent of warm mixed asphalt cement comprises the following components in percentage by weight: 90.0-97.0 percent of asphalt cement, 2.0-8.0- percent of rheological modification agent and 0.5-5.0 percent of macromolecular polymer, wherein the rheological modification agent is formed by combining the following substances: (a) byproducts produced in a petroleum refining process, wherein the weight content of aromatics is 50-80 percent, and the kinematic viscosity at 100 DEG C is 20 mm<2>/s to 70 mm<2>/s; and (b) derivatives produced in petrochemical industry, coal chemical industry and forestry chemical industry; through the warm mixed asphalt cement, the high-temperature rutting resistance, low-temperature tensile strength and resistance to brittle fracture of the asphalt cement are improved while energy conservation and environmental protection are realized; the asphalt cement is mainly applied to construction and maintenance of various grades of highways and municipal roads, and is particularly suitable for cities, parks and tunnels with higher environmental protection requirements.

Description

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

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
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap