Solid Oil-Based Binder for Recycled Asphalt
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Solution Overview
Problem
The use of recycled bituminous asphalt aggregates in producing new bituminous asphalt is hindered by the presence of solidified bituminous residues with non-homogeneous compositions, wide size distribution, and aged bituminous binders with altered properties, leading to difficulties in achieving homogeneous and mechanically sound asphalt products.
Innovation Solution
A solid oil-based binder system at room temperature, comprising aromatic hydrocarbon oils, Brai (petroleum pitch), and a chemical organogelator additive, which remains solid and can be easily mixed with recycled asphalt aggregates to produce bituminous coatings without significantly altering the binder's properties or the final product's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If recycled bituminous mix aggregates are used, then environmental sustainability is improved, but homogeneity of the binder composition deteriorates
Solution Approach 1:
The patent changes the physical state parameter of the binder from liquid to solid by incorporating organogelators. This transformation allows the binder to be used with recycled aggregates while maintaining compositional homogeneity, as the solid state prevents phase separation and ensures uniform distribution of binder components throughout the recycled mix.
Solution Approach 2:
The invention creates a composite binder system combining traditional bituminous binder with organogelator additives. This composite material achieves both sustainability (through recycled aggregate compatibility) and homogeneity (through the gelating effect that uniformizes the binder matrix), resolving the contradiction between environmental benefits and compositional stability.
2Ease of operation
If binder is heated for transport and storage, then fluidity is improved, but energy consumption increases
Solution Approach 1:
The patent utilizes phase transition of the binder from solid to liquid state through controlled heating during application, rather than maintaining continuous heating during transport and storage. The organogelator system allows the binder to remain solid at ambient temperatures (easy to handle) but transitions to liquid when heated (easy to apply), eliminating the need for continuous energy input during storage and transport.
Solution Approach 2:
Instead of keeping the binder liquid through continuous heating (traditional approach), the invention inverts the approach by maintaining the binder in solid state during transport and storage, then transitioning to liquid only when needed for application. This reversal of the traditional liquid-state maintenance approach dramatically reduces energy consumption while ensuring ease of operation at the point of use.
3Ease of operation
If binder is heated for extended periods, then application readiness is improved, but binder aging accelerates
Solution Approach 1:
The patent incorporates organogelators into the binder formulation in advance, creating a stable solid-state system that maintains application readiness without requiring extended heating. The preliminary incorporation of these additives ensures the binder can be quickly heated to application temperature without prolonged thermal exposure, thus preventing aging while ensuring readiness.
Solution Approach 2:
The invention changes the thermal parameters of the binder system through organogelator addition, creating a material that requires less heating time and lower temperatures to achieve application readiness. This parameter modification reduces the duration and intensity of thermal exposure, thereby slowing down aging processes while maintaining ease of operation.
4Temperature
If organogelator is added to solidify binder, then solid form at room temperature is achieved, but usage properties may be modified
Solution Approach 1:
The patent carefully selects and dosages organogelators to achieve the desired solidification parameter change without significantly altering other usage properties. By controlling the concentration and type of organogelator, the binder maintains its essential rejuvenating properties while achieving the solid-at-room-temperature characteristic, thus balancing parameter change with property preservation.
Solution Approach 2:
The invention applies organogelators at specific local concentrations within the binder system to achieve solidification only where needed (providing structural form during storage), while preserving the liquid-like flow and binding properties when the binder is heated and applied. This localized quality adjustment resolves the contradiction between solid form and usage versatility.
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 proposed binder system allows for efficient handling and processing at room temperature, reducing energy costs and maintaining the binder's properties, thereby facilitating the production of bituminous asphalt with improved homogeneity and mechanical properties from recycled aggregates.
Implementation Method 1
it is known that low molecular weight organogelators allow liquids to be gelled thermoreversibly
Implementation Method 2
which can be made fluid by simple heating
Data Source
AI summary
The invention relates to the use of a binder, in divided form, that is solid at ambient temperature, comprising at least one oil selected from a hydrocarbon oil of petroleum or synthetic origin and mixtures of same, and at least one chemical organogelator additive, for the production of asphalt mixes from recycled asphalt mix aggregates. The solid-at-ambient-temperature binder can be used for the production of asphalt mixes obtained from recycled asphalt mix aggregates, said binder comprising at least one oil selected from a hydrocarbon oil of petroleum or synthetic origin and mixtures of same, at least one pitch and at least one chemical organogelator additive.