Polyester Emulsion Asphalt Weather Resistance
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Solution Overview
Problem
Asphalt pavements suffer from advanced degradation due to ultraviolet rays, leading to cracking and increased maintenance costs, especially in regions with high-intensity sunlight, and existing solutions lack sufficient weather resistance.
Innovation Solution
A polyester emulsion is developed containing specific polyester particles with a volume median particle diameter of 20 nm to 500 nm, dispersed in water, which is used to modify asphalt, enhancing its weather resistance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If asphalt is used for pavement, then construction is easy and paving time is short, but weather resistance is poor and degradation occurs due to ultraviolet rays
Solution Approach 1:
The invention uses composite materials by combining asphalt with polyester particles to create a modified asphalt composition. The polyester particles are dispersed in the asphalt matrix to form a composite material that maintains the ease of construction of asphalt while adding weather resistance properties from the polyester component.
Solution Approach 2:
The invention changes the physical and chemical parameters of asphalt by incorporating polyester particles with specific properties (particle diameter 0.1-10 μm, specific functional groups). This parameter modification enables the asphalt to resist ultraviolet degradation while maintaining its construction advantages.
2Reliability
If polyester is added to increase weather resistance, then durability improves, but viscosity increases and workability deteriorates
Solution Approach 1:
The invention carefully controls the parameters of polyester particles (particle diameter, molecular weight, functional groups) to achieve the right balance between durability and workability. By optimizing these parameters, the polyester provides weather resistance without excessively increasing viscosity.
Solution Approach 2:
The polyester particles are distributed throughout the asphalt matrix, providing local weather resistance properties where needed while maintaining the overall flow and workability of the asphalt composition.
3Reliability
If polyester particles are used to modify asphalt, then weather resistance improves, but production complexity increases
Solution Approach 1:
The invention specifies particular parameter ranges for polyester particles (particle diameter 0.1-10 μm, specific functional groups) that simplify production by providing clear manufacturing targets while achieving the desired weather resistance improvement.
Solution Approach 2:
The polyester particles act as an intermediary substance that bridges the gap between asphalt and weather resistance requirements, providing a straightforward modification approach without complex production processes.
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 polyester emulsion significantly improves the weather resistance of asphalt pavements, reducing degradation and cracking, and allows for normal-temperature pavement installation, thereby reducing maintenance costs and improving pavement longevity.
Implementation Method 1
an asphalt emulsion in which an asphalt is dispersed in water
Implementation Method 2
asphalt pavement superior in weather resistance which undergoes small degradation by ultraviolet rays
Data Source
AI summary
The present invention relates to [1] a polyester emulsion for modifying asphalt that contains polyester particles having a volume median particle diameter (D50) of 20 nm or more and 500 nm or less and water, [2] a method for producing the polyester emulsion for modifying asphalt of the above [1], the method including a step of adding an aqueous medium to a molten polyester having a weight average molecular weight of 2,000 to 100,000, and [3] an asphalt emulsion composition containing an asphalt emulsion and the polyester emulsion of the above [1].