PPK-Plastic Composite Agglomerates for Binder-Free Construction Aggregates
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Solution Overview
Problem
Existing recycling methods for PPK-plastic composite material from municipal waste are costly, complex, and generate significant CO2 emissions, while conventional construction aggregates require additional binders and are not sustainable.
Innovation Solution
A process that sorts and crushes PPK-plastic composite material to produce agglomerates with a higher PPC content, which are then compacted to form construction aggregates, eliminating the need for additional binders and utilizing the plastic content as a binding agent, and can be pyrolyzed into pyrocarbon for carbon storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If thermal recycling is used to process PPK-plastic composite material, then CO2 emissions are reduced and the material is disposed of, but the process is costly and generates significant CO2 emissions
Solution Approach 1:
The patent replaces thermal recycling (combustion) with a mechanical crushing and compaction process. The PPK-plastic composite material is mechanically crushed into fine fractions and then compacted under high pressure to form construction aggregates, eliminating the need for energy-intensive thermal processing while avoiding CO2 emissions and reducing costs.
Solution Approach 2:
The patent changes the physical parameters of the material through mechanical crushing (reducing particle size) and compaction (applying high pressure). These parameter changes transform the waste material into a useful construction aggregate product without thermal processing, thereby avoiding CO2 emissions and associated costs.
2Adaptability or versatility
If wet-chemical processes are used to separate components, then individual components can be recycled, but the process becomes complex and requires large quantities of chemicals and wash water
Solution Approach 1:
Instead of using complex wet-chemical processes to extract and separate individual components, the patent takes out the entire PPK-plastic composite material as a whole and transforms it directly into construction aggregates through mechanical crushing and compaction. This approach accepts the composite structure and repurposes it, avoiding the need for component separation entirely.
3Strength
If conventional construction aggregates are produced with additional binders, then the aggregates achieve desired properties, but the process is not sustainable and requires additional materials
Solution Approach 1:
The patent applies self-service by using the plastic component already present in the PPK-plastic composite material as the binding agent. During compaction, the plastic acts as a natural binder that holds the crushed PPK particles together, eliminating the need for additional synthetic binders and making the process more sustainable.
Solution Approach 2:
The patent creates a new composite material where crushed PPK particles are bound together by the plastic component. This composite structure achieves the desired strength and stability for construction aggregates while utilizing the inherent materials in the waste stream, improving sustainability.
4Productivity
If PPK-plastic composite material is thermally recycled, then the material is disposed of efficiently, but the process generates significant CO2 emissions and costs fees for disposal companies
Solution Approach 1:
The patent converts the harmful aspect of PPK-plastic composite material (its difficulty to recycle and tendency toward thermal disposal) into a beneficial construction aggregate product. By mechanically processing the material instead of burning it, the patent transforms what would be a harmful waste disposal process into a beneficial resource recovery process that produces useful construction materials.
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 process reduces recycling costs, eliminates the need for thermal disposal, and produces construction aggregates with improved CO2 footprint and thermal insulation properties, suitable for asphalt and concrete applications.
Implementation Method 1
crushing the raw material fraction and producing agglomerates (A) by compacting the crushed raw material fraction
Implementation Method 2
producing agglomerates (A) by compacting the crushed raw material fraction
Implementation Method 3
the PPK-plastic composite material is pyrolyzed, i.e., thermally treated in the absence of oxygen or at least with a significant oxygen deficit
Data Source
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AI summary
A process is described for processing PPC-plastic composite material, such as composite packaging from municipal waste, comprising the following steps: - Sorting a primary material and providing a raw material fraction intended for further processing, containing at least largely only PPC and plastic, with a higher PPC content than the plastic content, - Crushing the raw material fraction, and - Producing agglomerates by compacting the crushed raw material fraction. Furthermore, the use of the agglomerates produced by the process as construction aggregate is described.