CIRCULAR ECONOMY · BITUMEN · MINERAL MATRICES

Bitumen, asphalt & hydrocarbon-based matrices

Bitumen is rarely alone. In membranes, roads or oil sands, it is associated with reinforcements, fillers, aggregates, sands or mineral matrices. The industrial bottleneck is therefore not only to heat or fluidise bitumen: it is to separate a hydrocarbon-based matrix from what structures, reinforces or loads it. XCRUSHER has been applied to several families of bituminous materials to observe the separation between the hydrocarbon-based matrix and its associated constituents: reinforcements, aggregates, sands or mineral matrices.

One question: separating bitumen from its matrix

Bituminous materials are complex systems. Their value depends on the ability to distinguish the hydrocarbon binder from aggregates, fibres, fillers or reinforcements. In conventional approaches, temperature is often used to reduce viscosity and put the material back into motion. This can be useful, but it does not always solve the interface bottleneck: bitumen / fibre, bitumen / aggregate, bitumen / sand or bitumen / reinforcement. XCRUSHER is positioned on this physical bottleneck: acting on the separation between bitumen and its matrix, in order to prepare better-differentiated and better-qualified fractions for downstream steps.

Three families of bituminous materials

1. Bituminous membranes

Bituminous membranes combine a bituminous matrix, polymer modifiers such as SBS or APP, nonwoven polyester reinforcements, fillers, films and sometimes surface layers. At end of life, these membranes become heterogeneous: ageing, oxidation, hardening, trapped fibres, fillers and reinforcements that are difficult to extract. The challenge is to promote separation between the bituminous matrix, reinforcements and fillers, in order to prepare a more filterable and better-qualified fraction for possible reincorporation.

2. Asphalt & road infrastructure

In road materials, bitumen is bound to mineral aggregates. The value of the material depends on the ability to separate or requalify the bitumen / aggregate association. The issue is not only to crush asphalt. It is to understand how the hydrocarbon binder adheres to aggregates and how this interface can be weakened, opened or prepared. XCRUSHER enables the exploration of physical separation between bituminous binder or membrane and aggregates, particularly in road or motorway infrastructure contexts.

3. Oil sands

Oil sands raise a similar question at another scale: how to separate a bituminous phase from a mineral or sandy matrix. The bitumen is intimately associated with a mineral fraction. The difficulty is to liberate the hydrocarbon phase without turning the whole material into a hard-to-process mixture. Here again, XCRUSHER explores an interface-separation logic: bitumen / sand, bitumen / mineral, hydrocarbon-based matrix / inorganic matrix.

The XCRUSHER approach

XCRUSHER is not a bitumen-heating technology. The platform acts through a physical pulse, with the objective of creating separation at the interfaces between a hydrocarbon-based matrix and its associated constituents. Depending on the material, the objective may be: detaching a bituminous matrix from its reinforcements · separating a binder from an aggregate · liberating a hydrocarbon phase from a sandy matrix · reducing filtration disturbance · preparing cleaner and better-qualified fractions · assessing reincorporation or valorisation potential.

What the trials show

  • bitumen / reinforcement separation;
  • bitumen / aggregate separation;
  • bitumen / sand or mineral-matrix separation;
  • fraction cleanliness;
  • filtration / downstream-formulation behaviour;
  • reincorporation potential depending on the stream.
Examples of materials: SBS or APP bituminous membranes · membranes with nonwoven polyester reinforcements · aged bituminous membranes from renovation · asphalt and road materials · bituminous binders associated with aggregates · oil sands · hydrocarbon-based matrices associated with fillers or minerals.
Positioning: XCRUSHER brings a cross-cutting reading of bitumen: not as a homogeneous material to be heated, but as a complex matrix to be separated from what surrounds it. Whether the material is a membrane, road asphalt or oil sand, the challenge remains the same: identify the interfaces, open them physically and qualify the recovered fractions.
Each bituminous stream must be qualified individually. Behaviour depends on formulation, ageing, temperature, viscosity, reinforcements, aggregates and downstream requirements. XCRUSHER does not claim automatic chemical regeneration of bitumen or polymer modifiers.

Do you have a bituminous, asphalt or hydrocarbon-based stream to qualify?

Describe the matrix, aggregates or reinforcements, and the targeted valorisation route.
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