Asphalt Composition with Polyester Resin for Fuel Resistance
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Solution Overview
Problem
Asphalt pavements are prone to erosion and damage due to dissolution by petroleum-derived fuels and lubricants, leading to increased maintenance costs and pavement destruction, as they lack sufficient dry strength, water immersion strength, and bending strength.
Innovation Solution
An asphalt composition comprising asphalt, a polyester resin with specific molecular weight and acid value ranges, and an aggregate, where the polyester resin is mixed with asphalt and aggregate at elevated temperatures to enhance adhesion and durability, thereby improving the asphalt composition's dry strength, water immersion strength, and bending strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If asphalt is used as the binder for road pavement, then the construction is easy and the paving period is short, but the asphalt is prone to dissolution by petroleum-derived fuels and lubricants, leading to erosion and pavement destruction
Solution Approach 1:
The invention uses a composite binder system combining asphalt with a polymer component (styrene-butadiene-styrene block copolymer or similar). This composite material leverages the ease of application of asphalt while adding the fuel resistance properties of the polymer, creating a binder that maintains both construction efficiency and durability against petroleum product erosion.
Solution Approach 2:
The invention modifies the chemical composition parameters of the binder by incorporating specific polymers with defined molecular weights and compositions. This changes the binder's chemical structure to include aromatic and aliphatic components that are resistant to dissolution by fuels and lubricants, while maintaining the workability needed for efficient paving.
2Ease of manufacture
If conventional asphalt composition is used, then the construction process is simple, but the pavement lacks sufficient dry strength, water immersion strength, and bending strength
Solution Approach 1:
The invention creates a composite asphalt-polymer mixture that combines the simplicity of asphalt application with the enhanced mechanical properties of synthetic polymers. The polymer component forms a three-dimensional network structure that significantly improves dry strength, water immersion strength, and bending strength while maintaining construction simplicity.
Solution Approach 2:
The invention changes the physical and chemical parameters of the binder by incorporating polymers with specific glass transition temperatures and molecular weights. This modifies the binder's rheological properties to achieve optimal strength characteristics while preserving ease of application during construction.
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 exhibits excellent dry strength, strength after immersion in water, and bending strength, effectively resisting erosion from fuels and lubricants, reducing maintenance costs and pavement damage.
Implementation Method 1
a polyester resin... to enhance adhesion and durability
Implementation Method 2
a step of mixing asphalt, a polyester resin, and an aggregate at 130°C or higher and 200°C or lower
Data Source
AI summary
The present invention relates to an asphalt composition for road pavement, which is excellent in drying strength, strength after immersion in water, and bending strength, a method for producing the same, and a road paving method. [1] An asphalt composition for road pavement including asphalt, a polyester resin and an aggregate, wherein the polyester resin is a specific polyester, and the ratio of the polyester resin is 2 parts by mass or more and 30 parts by mass or less based on 100 parts by mass of asphalt; [2] a method for producing an asphalt composition for road pavement, including a step of mixing asphalt, a polyester resin, and an aggregate at 130°C or higher and 200°C or lower, wherein the polyester resin is the polyester in [1], and the ratio of the polyester resin is 2 parts by mass or more and 30 parts by mass or less based on 100 parts by mass of asphalt; and [3] a road paving method including a step of laying the asphalt composition obtained by the method of [2], thereby forming an asphalt paving material layer.