Cement Plastic Mixture Mixing Process
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Solution Overview
Problem
Current cement mixtures for construction and stonework do not effectively utilize plastic waste for ecological consumption and production, lacking a comprehensive method for incorporating recycled plastic materials.
Innovation Solution
A cement plastic mixture is prepared by mixing crushed plastics with Portland cement, superplasticizer, silica sand, and synthetic fibers, with a specific composition and mixing process that includes two steps: initial mixing of plastic crumb, cement, and water, followed by addition of superplasticizer and other components, resulting in a high-strength, self-leveling mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If plastic waste is incorporated into cement mixtures, then ecological consumption is promoted, but the mixture strength and consistency may deteriorate
Solution Approach 1:
The patent applies parameter changes by carefully controlling the proportion of plastic crumb (5-20% by weight) and adjusting water-cement ratio, superplasticizer dosage, and mixing parameters to maintain mixture strength while incorporating plastic waste. The specific composition ranges and mixing conditions are optimized to ensure the plastic components do not compromise the structural integrity of the cement mixture.
Solution Approach 2:
The patent creates a composite material system combining cement, plastic crumb, superplasticizer, and other additives in specific proportions. This composite approach allows the plastic waste to be integrated within the cement matrix while maintaining structural performance through the synergistic interaction of components, where the cement provides strength and the plastic provides ecological sustainability.
2Adaptability or versatility
If plastic crumb is added to cement mixture, then ecological use of waste is achieved, but mixing uniformity and consistency may worsen
Solution Approach 1:
The patent applies preliminary action by pre-mixing the plastic crumb with a portion of the cement and water before incorporating the remaining components. This staged mixing approach ensures uniform distribution of plastic particles throughout the mixture, preventing clumping and ensuring consistent composition. The superplasticizer is added in controlled amounts to facilitate uniform dispersion of plastic crumb within the cement matrix.
3Ease of manufacture
If conventional mixing methods are used with plastic waste, then preparation simplicity is maintained, but mixture homogeneity and quality may deteriorate
Solution Approach 1:
The patent applies continuity of useful action by implementing a multi-stage mixing process where components are added sequentially and mixed continuously. The mixture is mixed for 2-5 minutes initially, then superplasticizer is added and mixed for an additional 1-3 minutes to ensure complete dispersion. This continuous mixing action ensures homogeneous distribution of all components, including plastic crumb, while maintaining a relatively simple preparation process that can be implemented in standard construction equipment.
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 method enables the production of high-strength cement plastic products that can be used for various applications, such as garden furniture and paving, while promoting the ecological use of plastic waste through a unique composition and mixing process.
Implementation Method 1
a superplasticizer, e.g. Melment, a superplasticizer based on melamine formaldehyde resin
Implementation Method 2
It may be a mixture that contains crushed plastics preferably which cannot be further recycled... and cement, e.g. Portland gray or white
Data Source
AI summary
A method of preparing a cement plastic mixture is based on the fact that in the first step plastic crumb, cement water and optionally silica sand are mixed in a mixing device at a temperature 8° C. to 25° C. for 3 minutes. In the second step, at least one of the following components is added: superplasticizer, solidification accelerator, synthetic fiber, paint and optionally silica fume (microsilica) Si02 for 9 minutes.