Asphalt Composition with Dispersant for Polyester Resin Stability
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Solution Overview
Problem
Asphalt pavements experience rutting and cracking due to long-term use, leading to increased maintenance costs and traffic disruptions, and existing compositions with polyester resins often result in uneven mixing and sedimentation, affecting stability and strength.
Innovation Solution
An asphalt composition containing asphalt, a polyester resin, and a dispersant, mixed at elevated temperatures to enhance storage stability and dry strength, with the dispersant reducing particle size and improving dispersion of the polyester resin within the asphalt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyester resin is added to asphalt to improve high-temperature stability and dry strength, then the pavement resistance to rutting and cracking is improved, but the mixture becomes uneven and the resin sediments during storage
Solution Approach 1:
A dispersant is introduced as an intermediary substance to facilitate uniform distribution of polyester resin particles in the asphalt binder. The dispersant prevents aggregation and sedimentation of resin particles, maintaining mixture homogeneity during storage while enabling the resin to provide its stabilizing effects on the pavement structure.
Solution Approach 2:
The invention creates a composite system combining asphalt, polyester resin, and dispersant. This composite material leverages the high-temperature stability of polyester resin with the dispersing capabilities of the dispersant additive, achieving both improved pavement reliability and storage stability through synergistic material combination.
2Strength
If polyester resin is added to enhance dry strength, then the pavement durability is improved, but the mixing uniformity deteriorates leading to sedimentation
Solution Approach 1:
The dispersant acts as a mediator that enables thorough mixing of polyester resin with asphalt by reducing particle aggregation. This intermediary substance ensures uniform distribution of resin throughout the binder, achieving manufacturing precision in mixing while preserving the strength-enhancing properties of the resin.
Solution Approach 2:
The invention changes the physical-chemical parameters of the mixture by introducing a dispersant that modifies the interfacial properties between polyester resin and asphalt. This parameter change facilitates better wetting and distribution of resin particles, achieving uniform mixing precision while maintaining the strength benefits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides an asphalt mixture with improved high-temperature storage stability and enhanced dry strength, reducing the likelihood of rutting and cracking, thus minimizing maintenance costs and ensuring stable pavement performance.
Implementation Method 1
a dispersant, mixed at elevated temperatures to enhance storage stability and dry strength, with the dispersant reducing particle size and improving dispersion of the polyester resin within the asphalt
Implementation Method 2
mixed at elevated temperatures to enhance storage stability and dry strength
Data Source
AI summary
The present invention relates to an asphalt composition which is excellent in storage stability at a high temperature, an asphalt mixture, a method for producing the same, and a road paving method. Provided are [1] an asphalt composition containing asphalt, a polyester resin, and a dispersant; [2] an asphalt mixture containing the asphalt composition as set forth above in [1] and an aggregate; [3] a road paving method including a step of laying the asphalt mixture as set forth above in [2], thereby forming an asphalt paving material layer; and [4] a method for producing an asphalt mixture including mixing asphalt, a polyester resin, a dispersant, and an aggregate at 130° C. or higher and 200° C. or lower.