Rubber Powder-Sediment-Fly Ash Fine Aggregate via Layered Compression
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Solution Overview
Problem
The challenges of efficiently utilizing rubber powder and fly ash wastes, which cause environmental pollution and resource inefficiency, and sediment wastes, which lead to ecological damage and high transportation costs, in the production of high-quality aggregates for canal lining and construction, are addressed.
Innovation Solution
A method involving a rolling and compression granulator with layer-by-layer coating and multi-stage high-temperature treatment is used to produce a rubber powder-sediment-fly ash artificial fine aggregate, enhancing compactness and strength through fluorosilicate-graphene bonding and carbon dioxide air-cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If rubber powder, sediment, and fly ash are directly mixed to produce artificial aggregates, then production cost is reduced and waste utilization is improved, but the compactness and strength of the aggregate are insufficient
Solution Approach 1:
The patent applies preliminary action by pre-treating rubber powder with alkali solution to remove impurities and enhance surface reactivity before mixing with sediment and fly ash. This pre-processing step ensures that the waste materials are properly prepared to achieve both high utilization and strong bonding in the final aggregate product.
Solution Approach 2:
The patent employs parameter changes by optimizing the particle size distribution of rubber powder (0.5-2.0mm), sediment (0.3-1.5mm), and fly ash (0.1-0.5mm), along with controlling mixing ratios (rubber powder 30-50%, sediment 40-60%, fly ash 10-20%) and curing temperature (80-120°C). These parameter optimizations enable the waste materials to achieve both effective utilization and high aggregate strength.
2Reliability
If natural sand and gravel aggregates are mined to meet construction demands, then quality aggregates are supplied, but ecological environment is damaged and water loss is aggravated
Solution Approach 1:
The patent converts harmful waste materials (rubber powder from tires, sediment from canals, fly ash from power plants) into beneficial construction aggregates. By transforming these pollutants into useful resources through chemical treatment and controlled synthesis, the patent eliminates ecological harm while providing high-quality aggregate alternatives to natural sand and gravel.
Solution Approach 2:
The patent changes the physical and chemical parameters of waste materials through alkali treatment, controlled drying, and thermal curing processes. These parameter transformations convert the original waste materials into aggregates with optimized strength, porosity, and durability characteristics that meet construction requirements.
3Ease of manufacture
If sediment is accumulated at canal embankment sides for regular clearing, then sediment management is simplified, but dust pollution increases and canal lining damage is aggravated
Solution Approach 1:
The patent converts the harmful accumulated sediment into a valuable resource by mixing it with rubber powder and fly ash to produce artificial aggregates. This transformation eliminates dust pollution problems associated with stored sediment while providing a useful construction material, turning the sediment management problem into a resource utilization opportunity.
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 effectively transforms waste materials into high-quality aggregates, reducing environmental impact, lowering costs, and improving the durability and stability of canal linings while promoting sustainable resource utilization.
Implementation Method 1
The compact arrangement and aggregation are achieved for an artificial aggregate by applying a pressure to improve the compactness of the aggregate
Implementation Method 2
an aggregate is cured through a multi-stage high-temperature treatment and carbon dioxide air-cooling to improve the compactness and strength of the aggregate
Implementation Method 3
enhancing compactness and strength through fluorosilicate-graphene bonding
Data Source
AI summary
A preparation method of a rubber powder-sediment-fly ash artificial fine aggregate is provided. The rubber powder-sediment-fly ash artificial fine aggregate is prepared by a rolling and compression granulator through layer-by-layer coating of a rubber powder, a canal sediment, and a hydraulic material. The compact arrangement and aggregation are achieved for an artificial aggregate by applying a pressure to improve the compactness of the aggregate. In addition, an aggregate is cured through a multi-stage high-temperature treatment and carbon dioxide air-cooling to further improve the compactness and strength of the aggregate. When the artificial fine aggregate is used as a fine aggregate, solid wastes can be reasonably utilized under the premise of meeting quality standards, which is of great practical significance for protecting the ecological environment and promoting the sustainable development of sand and gravel industry.