Cement Plastic Screed Composition for Low-Cost Plastic Waste Recycling
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Solution Overview
Problem
Existing cement-based products are not suitable for creating floor screeds and do not effectively utilize plastic waste for ecological benefits.
Innovation Solution
A dry mixture of cement plastic screed composed of crushed plastics, Portland cement, silica sand, superplasticizer, and silica fume, which can be mixed with water at the point of use, utilizing plastic waste as a cost-effective and eco-friendly alternative to marble crumb.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cement mixtures with marble crumb are used, then the product achieves terrazzo appearance and structural integrity, but production costs are high and plastic waste is not utilized
Solution Approach 1:
The patent changes the material composition parameters by replacing marble crumb with plastic waste particles and adjusting the cement binder composition to include specific polymers and additives. This substitution maintains structural integrity while dramatically reducing production costs and eliminating the need for expensive natural stone materials.
Solution Approach 2:
The invention uses plastic waste particles, which are inexpensive byproducts of plastic production, to replace expensive marble crumb. These plastic particles serve the same aesthetic and structural function at a fraction of the cost, making the screed economically viable while addressing plastic waste disposal issues.
2Ease of manufacture
If plastic waste is incorporated into cement mixtures, then production costs decrease and ecological benefits are achieved, but the mixture becomes unsuitable for creating floor screeds
Solution Approach 1:
The patent creates a composite material system combining cement, polymers, plastic particles, and specialized additives. This composite formulation ensures that plastic waste particles are properly bound and distributed, providing the mechanical strength, adhesion, and durability required for floor screed applications while maintaining cost advantages.
Solution Approach 2:
The invention introduces intermediary substances such as polymers, surfactants, and coupling agents that facilitate the bond between plastic particles and cement matrix. These intermediaries ensure proper adhesion and structural integrity, making the plastic-cement mixture suitable for load-bearing floor screed applications.
3Ease of manufacture
If plastic crumb is used instead of marble crumb, then production costs are reduced by up to 80%, but the mechanical properties and binding effectiveness must be maintained
Solution Approach 1:
The patent modifies the chemical and physical parameters of the binder system by incorporating specific polymers, admixtures, and surface treatments. These parameter changes enhance the bonding strength between plastic particles and cement, ensuring that mechanical properties meet or exceed traditional terrazzo specifications despite using cheaper plastic waste material.
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 mixture reduces production costs by up to 80% and effectively recycles plastic waste while providing a terrazzo-like appearance and improved mechanical properties.
Implementation Method 1
powdery superplasticizer 10/40
Implementation Method 2
silica fume (microsilica) SiO 2
Implementation Method 3
Portland cement 32.5 CEM I
Data Source
AI summary
Dry mixture of cement plastic screed contains: - 18% of weight to 24% of weight of plastic crumb, - 20% of weight to 26% of weight of Portland cement, - 20% of weight to 26% of weight of silica sand with a fraction 0.2 to 0.8 mm, - 2.7% of weight to 3.1% of weight of superplasticizer, - 2.0% of weight to 2.7% of weight of silica fume (microsilica) SiO2, - Gravel with a fraction 0/4 in additional quantity to 100% of weight.