CO2-Treated Desert Sand Aggregation for Concrete Strength
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Solution Overview
Problem
Existing methods are not economically and industrially suitable for transforming desert sand into a valuable construction resource while simultaneously mitigating CO2 emissions, thus addressing environmental degradation and climate change concerns.
Innovation Solution
A method and system that uses a CO2 capturing agent to treat desert sand grains, forming carbonate enhanced sand grains with increased size and surface roughness, and aggregates them with a sand-based glue to create conforming sand suitable for concrete applications, while storing CO2 on the grain surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If desert sand is used directly in concrete applications, then resource availability is improved, but the concrete strength and durability deteriorate due to unsuitable grain size and smooth surface
Solution Approach 1:
The patent applies parameter changes by modifying the physical and chemical properties of desert sand grains through CO2 treatment. The process changes the grain surface characteristics and size distribution, transforming the sand from unsuitable (smooth, fine grains) to suitable (rougher, optimized size) for concrete applications, thereby resolving the contradiction between resource availability and concrete strength
Solution Approach 2:
The patent creates a composite material by combining treated desert sand grains with binding agents and other concrete constituents. The CO2-treated sand forms a composite structure that enhances inter-grain bonding, allowing the use of abundant desert sand while achieving required concrete strength and durability
2Strength
If traditional sand mining is performed to obtain river sand for concrete, then concrete quality is improved, but environmental degradation worsens due to erosion and habitat destruction
Solution Approach 1:
The patent converts the previously harmful or useless desert sand into a beneficial construction material through CO2 treatment. This transforms an abundant but unsuitable resource into a viable alternative to river sand, eliminating the need for environmentally damaging sand mining while maintaining concrete quality
Solution Approach 2:
By changing the physical parameters of desert sand through CO2 exposure, the patent makes it suitable for concrete applications. The treatment modifies grain surface roughness and size distribution, enabling desert sand to replace mined river sand and thereby preventing environmental degradation
3Manufacturing precision
If advanced processing techniques are applied to refine desert sand, then suitability for concrete is improved, but economic and industrial feasibility deteriorates due to high processing costs
Solution Approach 1:
The patent employs a self-service mechanism where CO2 naturally reacts with desert sand grains to produce the desired surface modifications. This self-reacting process eliminates the need for complex, energy-intensive mechanical processing techniques, thereby reducing processing costs and improving economic feasibility while achieving suitable concrete-grade sand
Solution Approach 2:
The patent achieves manufacturing precision through chemical parameter changes rather than mechanical processing. By exposing desert sand to CO2, the grains undergo natural transformation in surface properties and size, providing concrete-suitable material without expensive advanced processing equipment or operations
4Quantity of substance
If CO2 capturing agent is applied to desert sand grains, then CO2 storage is improved, but the grain size and surface properties deteriorate initially before enhancement
Solution Approach 1:
The patent applies preliminary action by first introducing the CO2 capturing agent to desert sand grains, which initially may alter grain properties. Subsequently, further processing or treatment steps refine and enhance the grain size and surface roughness, ensuring both CO2 storage and suitable physical characteristics for concrete applications are achieved
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 increases the size and surface roughness of desert sand grains to meet concrete requirements, enhances concrete strength, and stores CO2, providing a sustainable and environmentally friendly solution for resource management and climate mitigation.
Implementation Method 1
A sand treatment method and system uses a CO2 capturing agent to treat desert sand grains to transform the sand into a valuable construction resource while storing CO2
Implementation Method 2
aggregates them with a sand-based glue to create conforming sand suitable for concrete applications
Data Source
AI summary
A plant for transforming desert sand grains into conforming sand for concrete applications includes a first mixing device configured to receive and mix the desert sand grains and a CO2 capturing agent to form enhanced sand grains, an adsorption chamber configured to receive the enhanced sand grains and mix the enhanced sand grains with a stream of CO2 and a stream of water to form carbonate enhanced sand grains, a second mixing device configured to mix fine desert sand grains with a base stream to form a sand-based glue, and a third mixing device configured to receive the carbonate enhanced sand grains and the sand-based glue and configured to mix the carbonate enhanced sand grains and the sand-based glue to form a sand aggregate. The desert sand grains are non-conforming for concrete applications while the sand aggregate is conforming for concrete applications.