Asphalt Emulsion Composite Particles UV Degradation
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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 technologies lack sufficient weather resistance for normal-temperature paving.
Innovation Solution
A method involving melt-mixing asphalt with polyester and adding an aqueous medium and surfactant to create an asphalt emulsion with composite particles, enhancing weather resistance and allowing for normal-temperature paving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If asphalt is used for pavement, then easy construction and short paving time are achieved, but weather resistance and durability deteriorate due to ultraviolet ray degradation
Solution Approach 1:
The invention uses composite particles consisting of asphalt and polyester resin as the core material. This composite structure combines the ease of construction and quick paving properties of asphalt with the weather resistance and durability of polyester resin, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The invention changes the physical state of asphalt from pure bitumen to an emulsion form dispersed in water. This parameter change allows the asphalt to be applied at lower temperatures while maintaining its binding properties, and the emulsion form enhances weather resistance by reducing ultraviolet degradation.
2Ease of operation
If asphalt emulsion is used to reduce viscosity for normal temperature paving, then workability is improved, but weather resistance deteriorates due to high water content
Solution Approach 1:
The invention incorporates polyester resin into the asphalt emulsion to form composite particles. This composite structure maintains the water-based emulsion form for easy application and normal temperature paving, while the polyester resin component provides enhanced weather resistance and reduces ultraviolet degradation.
Solution Approach 2:
The invention creates local quality enhancement by forming composite particles where polyester resin is distributed within the asphalt matrix. This localized reinforcement of weather resistance properties occurs at the particle level while maintaining the overall emulsion structure for good workability.
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 method produces an asphalt emulsion with improved weather resistance, reducing degradation by ultraviolet rays and enabling efficient, cost-effective maintenance with reduced disruption to traffic.
Implementation Method 1
adding an aqueous medium and a surfactant to the asphalt mixture obtained in the step 1, followed by mixing
Implementation Method 2
an asphalt emulsion in which an asphalt is dispersed in water to reduce the apparent viscosity
Data Source
AI summary
The present invention relates to [1] a method for producing an asphalt emulsion, the method including a step 1: a step of melt-mixing an asphalt and a polyester to obtain an asphalt mixture, and a step 2: a step of adding an aqueous medium and a surfactant to the asphalt mixture obtained in the step 1, followed by mixing, [2] an asphalt emulsion containing composite particles, the composite particles containing an asphalt and a polyester and having a volume median particle diameter (D50) of 1 μm or more and 40 μm or less, [3] an asphalt mix for pavement, containing the asphalt emulsion of the above [2] and an aggregate, and [4] a method for paving a road, the method including a step of laying the asphalt mix for pavement of the above [3] onto a road at 150° C. or lower.