Bituminous Mixture Additives for Low-Temperature Coating
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Solution Overview
Problem
Current bituminous mixture production processes at temperatures above 100°C consume significant fossil fuels, generate greenhouse gases, and lead to mechanical performance issues due to high energy expenditure and volatile organic compound emissions, while room temperature processes lack robustness in mechanical performance.
Innovation Solution
The addition of chemical additives to bituminous products allows for a reduction in production temperature by 20-40°C without compromising standardized properties, reducing fossil fuel consumption, greenhouse gas emissions, and improving operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If production processes at temperatures above 100°C are used, then good coating quality and mechanical performance are achieved, but significant fossil fuel consumption and greenhouse gas emissions occur
Solution Approach 1:
The patent changes the temperature parameter from above 100°C to between -10°C and +50°C by modifying the bitumen composition. This parameter change allows the coating process to occur at lower temperatures while maintaining adhesion quality, thereby reducing fossil fuel consumption and greenhouse gas emissions without sacrificing mechanical performance
Solution Approach 2:
The patent uses composite bitumen materials containing a mixture of different bitumen types (natural bitumen, mineral oil bitumen, tars) and additives (wetting agents, adhesion promoters). This composite approach enables the bitumen to maintain its coating properties at lower temperatures, resolving the contradiction between low-temperature processing and performance requirements
2Stability of the object's composition
If production processes at temperatures above 100°C are used, then adequate fluidity for coating is achieved, but volatile organic compound emissions increase
Solution Approach 1:
The patent modifies the viscosity-fluidity characteristics of bitumen through composition changes rather than temperature changes. By incorporating softer bitumen types and fluidity-enhancing additives, the bitumen achieves adequate fluidity at lower temperatures, preventing VOC emissions while maintaining coating quality
Solution Approach 2:
The patent introduces intermediary substances (wetting agents and adhesion promoters) that facilitate the coating process at lower temperatures. These intermediaries reduce the surface tension and improve wetting properties, allowing adequate fluidity and coating quality without requiring high temperatures that would generate VOC emissions
3Use of energy by stationary object
If room temperature production processes are used, then energy consumption is reduced, but mechanical performance deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the bitumen to enable effective coating at room temperature. By selecting bitumen with appropriate softening points and incorporating reactive additives, the system achieves mechanical bonding at low temperatures without the energy consumption of high-temperature processes while maintaining or improving mechanical performance
Solution Approach 2:
The patent modifies the chemical reactivity parameters through the addition of adhesion promoters and coupling agents. These additives create chemical bonds between the bitumen and aggregate at room temperature, ensuring adequate mechanical performance without requiring thermal energy input
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 lowers energy consumption, reduces dust emissions, enhances the durability and lifespan of bituminous mixtures, and maintains control over the coating process, ensuring better mechanical performance and reduced thermal shrinkage.
Implementation Method 1
The addition of chemical additives to bituminous products allows for a reduction in production temperature by 20-40°C without compromising standardized properties
Implementation Method 2
Processes at temperatures above 100°C use bitumen in anhydrous form, in a state of sufficient fluidity to ensure good coating of the aggregates
Implementation Method 3
The mixture obtained is then used using suitable equipment allowing transport, spreading and possible compaction
Data Source
AI summary
The invention relates to anhydrous bituminous products containing one or several specific additives which make it possible to substantially reduce a temperature for producing aggregate and bituminous product mixtures in such a way that it ranges from 20 to 40 °C, wherein the temperature of the aggregate and the bituminous product mixture during spreading ranges from 10 to 40 °C and the temperature in the core of the aggregate and bituminous product mixture during compacting can be raised to 50 °C without degrading the standard properties of the bituminous product and the bituminous product and aggregate mixture and ensuring the process continuity from transport to compacting according to the state of the art. The inventive aggregate and bituminous product mixtures are particularly suitable for tightening, building and servicing road surfaces, pavements and airfield runways.