Asphalt Composition with Bisphenol A Polyester for Rutting and Cracking Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Asphalt pavements face issues with both rutting and cracking due to long-term use, leading to increased maintenance costs and traffic disruptions, as existing compositions either prioritize durability over rutting resistance or vice versa.
Innovation Solution
An asphalt composition incorporating a polyester with an alkylene oxide adduct of bisphenol A and an alkylene glycol compound with 3 or more carbon atoms, which forms a high-strength complex with asphaltene, improves bonding strength and stress relaxation, thereby suppressing both rutting and cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional asphalt compositions are used, then construction is easy and paving is quick, but rutting and cracking occur due to long-term use
Solution Approach 1:
The patent uses a composite material system consisting of asphalt binder combined with specific polyester resins (containing aromatic rings and rigid segments) to create a modified asphalt composition. This composite structure provides both the workability of conventional asphalt and enhanced durability, suppressing rutting and cracking through the rigid structural units that maintain strength under load and temperature variations.
Solution Approach 2:
The patent modifies the chemical and physical parameters of the asphalt binder by incorporating polyester resins with specific molecular characteristics (aromatic rings, rigid segments, controlled softening point). This changes the rheological properties of the asphalt, improving its resistance to deformation and cracking while maintaining construction workability through proper selection of resin parameters.
2Strength
If asphalt content is increased to improve bonding, then cracking resistance improves, but rutting resistance deteriorates
Solution Approach 1:
Instead of changing asphalt content, the patent changes the chemical composition and molecular structure parameters of the binder by adding polyester resins with aromatic rings and rigid segments. This modifies the rheological properties to simultaneously improve bonding strength and rutting resistance through enhanced molecular rigidity and intermolecular interactions.
Solution Approach 2:
The patent creates a composite binder system where polyester resins with specific structural units (aromatic rings, rigid segments) work synergistically with asphalt to provide both strong bonding and rutting resistance, eliminating the need to increase asphalt content.
3Reliability
If maintenance is performed to repair pavement, then pavement durability is restored, but traffic is disrupted and costs increase
Solution Approach 1:
The patent applies preventive maintenance by incorporating polyester resins with aromatic rings and rigid segments into the asphalt composition before pavement construction. This pre-enhancement provides long-term durability and suppresses rutting and cracking development, delaying the need for repair operations and reducing future traffic disruptions.
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 proposed asphalt composition enhances rutting resistance and cracking resistance, as evidenced by improved plastic flow resistance and fracture energy, leading to a more durable pavement surface with reduced maintenance needs.
Implementation Method 1
forms a high-strength complex with asphaltene
Data Source
AI summary
The present invention relates to an asphalt composition containing asphalt and a polyester, wherein the polyester includes an alcohol component-derived structural unit including an alkylene oxide adduct of bisphenol A and an alkylene glycol compound having 3 or more carbon atoms (exclusive of the alkylene oxide adduct of bisphenol A).