Asphalt Composition with Polyester for Rutting Resistance

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Solution Overview

Problem

Asphalt pavements suffer from rutting and cracking over time, leading to increased maintenance costs and traffic disruptions, as conventional asphalt compositions either lack durability or exhibit brittleness when modified with polyester.

Innovation Solution

An asphalt composition containing 18-40% asphaltene and 1-10% polyester by mass, which enhances adhesive strength and durability by forming an asphaltene-polyester-fine aggregate composite, improving resistance to rutting and storage stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional asphalt is used for pavement, then construction is easy and traffic start is quick, but the pavement develops ruts and cracks over time requiring repair

Engineering Contradiction:

Improveease of constructionVSAvoidpavement durability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The invention uses a composite binder system combining asphalt with polyester resin and filler materials to create a modified asphalt composition that maintains the ease of construction of conventional asphalt while significantly improving pavement durability and resistance to ruts and cracks

Inventive Principle:

Principle #40Composite materials

2Reliability

If polyester is added to asphalt to improve durability, then resistance to rutting improves, but the asphalt composition becomes brittle

Engineering Contradiction:

Improveresistance to ruttingVSAvoidbrittleness

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The invention optimizes the parameters of the polyester addition by specifying precise proportions (0.5-5 parts polyester per 100 parts asphalt) and controlling the molecular weight and structure of the polyester to achieve the desired balance between rutting resistance and flexibility, preventing brittleness while maintaining durability

Inventive Principle:

Principle #35Parameter changes

3Reliability

If high asphaltene content asphalt is used, then hardness and rut resistance improve, but flow value decreases

Engineering Contradiction:

Improverut resistanceVSAvoidflow value

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The invention creates a composite binder system where polyester resin and filler materials work synergistically with asphaltene to maintain hardness and rut resistance while the polyester component preserves flow characteristics, preventing the excessive brittleness that would result from high asphaltene content alone

Inventive Principle:

Principle #40Composite materials

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 asphalt composition significantly reduces rutting and enhances durability and storage stability, maintaining pavement integrity and reducing maintenance costs.

Implementation Method 1

forming an asphaltene-polyester-fine aggregate composite

Methodology Applied

Scientific EffectComposite formation: Composite Materials

Data Source

PatentUS11958975B2Asphalt composition

Publication Date: 2024.04.16 KAO CORP

AI summary

An asphalt composition containing asphalt and polyester, wherein a content of asphaltene in the asphalt is 18% by mass or more and 40% by mass or less, and a content of the polyester is 1 part by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the asphalt.