Amine Additive System for Warm Bituminous Mixes
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Solution Overview
Problem
Current methods for reducing the manufacturing temperature of hot bituminous mixes do not sufficiently lower the temperature while maintaining the mechanical properties of the mixes, and often require significant modifications to traditional processes.
Innovation Solution
An additive system comprising alkylamidopolyamines, alkylimidazolines, and ethoxylated fatty acids is added to the bitumen, reducing the manufacturing and implementation temperatures of hot mixes by up to 50°C without degrading the mechanical properties, achieved by mixing the additives with the hydrocarbon binder before application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional hot mix manufacturing processes are used, then the mechanical properties and workability of the bituminous mixture are maintained, but the manufacturing temperature is high (140-175°C) leading to high energy consumption and environmental impact
Solution Approach 1:
The invention changes the chemical composition parameters of the bitumen by adding a specific system of additives (amine-type surfactants, ethoxylated fatty acids, and their reaction products) to modify the rheological properties of the binder, enabling workable mixtures at lower temperatures without sacrificing mechanical performance
Solution Approach 2:
The invention creates a composite bituminous binder system by combining traditional bitumen with a multi-component additive system comprising amine-type surfactants, ethoxylated fatty acids, and their reaction products, where the synergistic interaction of components enables temperature reduction while maintaining mixture properties
2Temperature
If manufacturing temperature is reduced to lower energy consumption, then environmental impact is reduced, but the mechanical properties and workability of the mixture deteriorate
Solution Approach 1:
The additive system modifies the chemical and rheological parameters of the bitumen binder, changing its viscosity-temperature relationship to maintain adequate binding strength and mixture workability at reduced manufacturing temperatures of 90-120°C
Solution Approach 2:
The amine-type surfactants and ethoxylated fatty acids act as intermediary substances that improve the interaction between bitumen and aggregates at lower temperatures, ensuring adequate adhesion and mechanical properties without requiring high thermal energy
3Ease of operation
If bitumen viscosity is reduced by heating, then workability and wettability with aggregates are improved, but energy consumption increases and environmental harm is caused
Solution Approach 1:
The invention changes the chemical composition of the bitumen binder by incorporating amine-type surfactants and ethoxylated fatty acids that modify the viscosity characteristics, allowing the binder to achieve adequate workability and wettability at lower temperatures without requiring intensive heating that generates greenhouse gases
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 system allows for the production and application of warm mixes at 30 to 50°C lower temperatures than traditional hot mixes, maintaining or improving mechanical properties and adhering to standard processes, thus reducing energy consumption and environmental impact.
Implementation Method 1
additive system based on amine-type surfactant used to manufacture hot-applied bituminous mixtures having a lowered manufacturing temperature
Implementation Method 2
the presence of this particular additive system, can be manufactured and implemented at temperatures 30 to 50° lower
Data Source
AI summary
The present invention relates to a system of additives for the preparation of a warm mix for road use comprising: one or more components (A) chosen from adhesion dopes, and one or more components (B) chosen from ethoxylated fatty (poly)amines and ethoxylated fatty amido(poly)amines. The invention also relates to the hydrocarbon-based binder and the bituminous mixes comprising said system of additives.