Reclaimed Aggregate Wet Concrete for Structural Building Components
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Solution Overview
Problem
Existing methods for utilizing demolition concrete are limited to earth construction due to the presence of hazardous materials and foreign substances, which prevent its use in house construction, especially for structural interior and exterior components, and the recycling process is costly and environmentally inefficient.
Innovation Solution
A method for producing wet concrete by mixing reclaimed aggregate, such as cleaned crushed concrete, with cement and other admixtures, ensuring the presence of hazardous materials and foreign substances is within acceptable limits, and adjusting the composition to meet strength and purity requirements for structural components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If demolition concrete is used directly in earth construction, then transportation costs are reduced and environmental impact is minimized, but the application scope is severely limited and quality requirements cannot be met for house construction
Solution Approach 1:
The patent extracts and removes hazardous materials and foreign substances from demolition concrete through a systematic cleaning process. This extraction enables the reclaimed aggregate to meet the stringent quality requirements for house construction while maintaining the environmental benefits of reuse, thus resolving the contradiction between limited application scope and quality requirements
Solution Approach 2:
The patent changes the physical and chemical parameters of demolition concrete by controlling the cleaning process to achieve specific purity levels (foreign substances ≤1%, hazardous materials within limits). This parameter transformation allows the material to transition from unsuitable for house construction to meeting structural interior and exterior component requirements
2Reliability
If demolition concrete is sent to recycling facilities for processing, then quality requirements can be met, but treatment costs increase significantly
Solution Approach 1:
The patent performs preliminary cleaning actions at the demolition site or nearby processing location, removing hazardous materials and foreign substances before the concrete is crushed and processed. This preliminary action reduces the burden on recycling facilities and lowers overall treatment costs while ensuring quality requirements are met
Solution Approach 2:
The patent employs cleaning methods that can be performed with relatively simple equipment and processes, allowing the demolition concrete to be cleaned and prepared for reuse with minimal external processing. This self-service approach reduces dependence on expensive specialized recycling facilities
3Ease of manufacture
If foreign substances and hazardous materials are present in demolition concrete, then processing costs are reduced, but the concrete cannot be used for structural interior components
Solution Approach 1:
The patent segments the cleaning process into distinct stages: removal of foreign substances, elimination of hazardous materials, and verification of purity levels. This segmentation allows for systematic processing that maintains simplicity while ensuring the concrete meets the stringent requirements for structural interior components
Data Source
AI summary
The invention relates to a method for the production of concrete applicable to the fabrication of structural exterior components or structural interior components, by mixing a binder, especially cement, a filler, comprising reclaimed aggregate, and water, as well as possible admixtures, such as a plasticizer, in such a way that the dry matter of wet concrete comprises a binder, especially cement, 10-40% by weight, preferably 25-30% by weight, a filler, especially aggregate, 90-60% by weight, the total amount of filler (i.e. aggregate) being nevertheless not more than 80% by weight of the wet concrete's total weight, and said aggregate comprising reclaimed aggregate, such as crushed concrete, 10-90% by weight, preferably 30-60% by weight, and other aggregate, such as sand or crushed stone, 90-10% by weight, preferably 70-40% by weight.