Roofing product including bio-based asphalt mixture and methods of making the roofing product and the roofing-grade asphalt mixture
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Solution Overview
Problem
Conventional asphalt mixtures for roofing products often rely on petroleum-based bitumen, which can be non-renewable and have inconsistent supply, and may not effectively utilize off-spec bitumen sources, leading to environmental concerns and inefficiencies.
Innovation Solution
The use of bio-asphalt, made from partially oxidized bio-source materials like vegetable oil or animal fat, combined with bitumen source materials to create a roofing-grade asphalt mixture that meets performance specifications, allowing for the inclusion of off-spec bitumen and reducing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If petroleum-based bitumen is used in conventional asphalt mixtures, then the roofing products can be manufactured with consistent supply, but the environmental impact increases and renewable resource utilization decreases
Solution Approach 1:
The patent changes the chemical composition parameters of the bitumen by blending petroleum-based bitumen with bio-asphalt derived from vegetable oils or animal fats. This creates a hybrid asphalt mixture that maintains the reliable supply chain of petroleum bitumen while incorporating renewable bio-based components to reduce environmental impact.
Solution Approach 2:
The invention creates a composite asphalt material by combining petroleum-based bitumen with bio-asphalt. This composite approach allows the mixture to benefit from the supply consistency of conventional bitumen while incorporating the environmental advantages of renewable bio-based materials, effectively resolving the contradiction between reliability and environmental impact.
2Reliability
If off-spec bitumen sources are not utilized, then the roofing product quality remains consistent, but material waste increases and environmental concerns worsen
Solution Approach 1:
The patent converts the previously harmful or useless off-spec bitumen sources into beneficial components of the asphalt mixture. By incorporating these off-spec materials into the bio-asphalt formulation, the invention transforms waste streams into valuable resources that improve product quality while reducing material waste and environmental concerns.
Solution Approach 2:
Instead of discarding off-spec bitumen sources, the invention recovers and utilizes them in the asphalt mixture. This recovery process extracts value from previously rejected materials, reducing waste while maintaining or improving roofing product quality through the synergistic effects of the blended asphalt composition.
3Object-affected harmful factors
If bio-asphalt is added to the asphalt mixture, then environmental acceptability improves and waste reduction occurs, but the manufacturing process complexity increases
Solution Approach 1:
The patent applies partial action by incorporating bio-asphalt at optimized concentrations (typically 5-50% by weight) rather than fully replacing petroleum bitumen. This partial incorporation achieves environmental benefits and waste reduction while limiting the increase in manufacturing complexity to manageable levels, maintaining compatibility with existing production infrastructure.
4Quantity of substance
If bio-asphalt is used to replace petroleum bitumen, then renewable resource utilization improves, but the viscosity and flexibility of the asphalt mixture may be affected
Solution Approach 1:
The patent carefully adjusts the compositional parameters of the asphalt mixture by controlling the ratio of petroleum bitumen to bio-asphalt. This parameter optimization ensures that the renewable content is maximized while the viscosity and flexibility remain within acceptable ranges for roofing applications, maintaining composition stability despite the incorporation of bio-based 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
This approach enables the production of roofing-grade asphalt that is environmentally more acceptable, reduces waste, and stabilizes supply fluctuations, while improving the flexibility and viscosity of the asphalt mixture, making it suitable for roofing applications.
Implementation Method 1
mixing a polyol with a bio-source material to form a bio-asphalt
Data Source
AI summary
A method of forming an asphalt mixture includes mixing a polyol with a bio-source material to form a bio-asphalt. The method can further include mixing the bio-asphalt with a bitumen source different from the bio-asphalt to form an asphalt mixture. The bio-source material can include an oil, such as a vegetable oil, an animal fat, or any combination thereof. The bitumen source can include a petroleum-based asphalt. The method can further include adding a modifier, such as a fatty acid, a polycarboxylic acid, a polyacrylic acid, a polyacrylate comprising a copolymer, or any combination thereof. Moreover, a roofing grade asphalt mixture includes a bio-asphalt. The bio-asphalt includes an alkyd, wherein the alkyd is a reaction product of a polyol and a bio-source material. The roofing grade asphalt mixture further includes a bitumen source material and particles.