Amine-Containing Asphalt Binder for Warm-Mix Workability
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Solution Overview
Problem
Current asphalt binder compositions for warm-mix asphalt face challenges in achieving excellent mixability, compactibility, and water resistance, leading to reduced durability and increased environmental impact due to high energy consumption and rapid oxidation, while existing additives like Sasobit wax and polyethylene wax either deteriorate adhesion or increase costs.
Innovation Solution
A multi-functional asphalt additive with a specific chemical composition, including a repeating unit and terminal groups, is used to enhance mixability, compactibility, and water resistance, allowing for asphalt paving at lower temperatures and improving mechanical properties such as marshall stability and dynamic stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature (160 to 180° C.) is used for mixing asphalt binder and aggregates, then mixability and compactibility are improved, but energy consumption increases and oxidation/aging of asphalt binder accelerates
Solution Approach 1:
The patent introduces a warm-mix asphalt additive that changes the physical and chemical parameters of the asphalt binder, specifically reducing its viscosity through chemical reactions. This allows the binder to flow and mix effectively at lower temperatures (reducing mixing temperature by 20-50°C), thereby decreasing energy consumption while maintaining mixability. The additive modifies the rheological properties of the binder to enable workable consistency at reduced temperatures.
Solution Approach 2:
The warm-mix asphalt additive acts as an intermediary substance between the asphalt binder and aggregates. It facilitates the mixing process at lower temperatures by modifying the binder's properties, enabling effective coating and adhesion without requiring high thermal energy. The additive mediates the interaction between binder and aggregates, ensuring proper mixability and compactibility while reducing the temperature requirement.
2Reliability
If high temperature (160 to 180° C.) is used for mixing asphalt binder and aggregates, then mixability is improved, but oxidation and aging of asphalt binder proceed rapidly, decreasing pavement lifetime
Solution Approach 1:
The additive changes the chemical composition and rheological parameters of the asphalt binder, reducing its viscosity and improving flow characteristics at lower temperatures. This parameter change enables effective mixing and coating at reduced temperatures, preventing thermal oxidation and aging that would otherwise occur during high-temperature processing, thereby extending pavement service life while maintaining mixability.
3Ease of operation
If Sasobit wax is used as warm-mix asphalt additive, then workability is improved at middle temperature, but adhesion force between aggregate and asphalt binder deteriorates and water resistance decreases
Solution Approach 1:
The patent employs a composite additive system combining organic wax components with amine-based compounds. The organic wax provides viscosity reduction and workability improvement at lower temperatures, while the amine-based component restores and enhances adhesion force between binder and aggregates. This composite approach synergistically combines the benefits of wax-based additives with the adhesive properties of amine compounds, achieving both workability and strong adhesion simultaneously.
Solution Approach 2:
The additive system exhibits local quality differentiation where different components perform specific functions: the organic wax portion primarily reduces viscosity and improves flow at lower temperatures, while the amine-based portion specifically targets and enhances the adhesive interface between binder and aggregates. This localized functional distribution ensures that workability and adhesion are optimized independently and simultaneously.
4Temperature
If polyethylene wax is used as warm-mix asphalt additive, then warm-mix asphalt paving mixture can be produced, but adhesion force between aggregate and asphalt binder deteriorates and water resistance decreases
Solution Approach 1:
The patent uses a composite additive formulation that combines polyethylene wax with amine-based compounds. The polyethylene wax component enables the mixture to be processed at reduced temperatures by lowering viscosity, while the amine-based component compensates for the adhesion loss and enhances water resistance. This composite material approach allows the system to achieve both temperature reduction and maintained water resistance simultaneously.
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 additive improves the productivity and performance of asphalt paving mixtures by enhancing mixability, compactibility, and water resistance, reducing the need for high-temperature processing and extending pavement lifespan while maintaining economic efficiency.
Implementation Method 1
an additive including a repeating unit represented by the following Chemical Formula 1 and at least one terminal group represented by the following Chemical Formula 2
Implementation Method 2
improving mixability, compactibility, and water resistance of asphalt paving mixtures
Data Source
AI summary
Provided herein is an asphalt binder composition, and more particularly, an amine-containing asphalt binder composition capable of improving mixability between an asphalt binder and an aggregate, and compactibility and water resistance of an asphalt paving mixture. More particularly, the present invention relates to an asphalt binder composition capable of being used in hot mix asphalt for improving workability and/or stripping-resistance, warm-mix asphalt, recycling of reclaimed asphalt pavement, or the like.