Cement Fly Ash Sealing Wall Material Impermeability
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Solution Overview
Problem
Existing sealing wall building materials require complex processing due to the use of swellable clay minerals, which can be difficult to handle, and often compromise on strength and adaptability for high impermeability.
Innovation Solution
A sealing wall building material composed of a cement and fly ash mixture, without clay minerals, achieving impermeability with a permeability coefficient (kf) of 10−7 m/s or less, using fly ash as a dispersible residue from combustion processes, and optimized with specific ratios of cement to fly ash and additives for improved flow and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If swellable clay minerals are added to achieve high impermeability, then the permeability coefficient is reduced, but the processing complexity increases and strength is compromised
Solution Approach 1:
The patent removes swellable clay minerals from the binding agent composition entirely, replacing them with fly ash and cement. This extraction of the problematic component eliminates the complex processing requirements associated with clay mineral swelling while maintaining the impermeability function through alternative mechanisms in the cement-fly ash matrix.
Solution Approach 2:
The patent changes the compositional parameters of the binding agent by specifying precise ratios of cement (30-70 parts by weight) and fly ash (30-70 parts by weight), eliminating clay minerals. This parameter optimization achieves the desired impermeability through the chemical characteristics of the cement-fly ash mixture rather than physical swelling mechanisms.
2Reliability
If clay minerals are used to ensure high impermeability, then the sealing effect is improved, but the strength and adaptability are reduced
Solution Approach 1:
The patent employs a composite binding agent system combining cement and fly ash in specific proportions. This composite material achieves both high strength and effective sealing without relying on clay minerals, as the synergistic interaction between cement and fly ash provides both mechanical strength and impermeability through different mechanisms.
3Reliability
If clay minerals are processed separately in a concluding mixing step, then the impermeability is achieved, but the manufacturing efficiency is reduced
Solution Approach 1:
The patent merges the binding agent components (cement and fly ash) into a single homogeneous mixture that can be processed together in one mixing operation. This consolidation eliminates the need for separate processing steps required for clay minerals, significantly improving manufacturing efficiency while maintaining impermeability through the integrated cement-fly ash matrix.
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 solution allows for efficient and cost-effective production of sealing walls with high impermeability and adaptability, maintaining stability while simplifying the manufacturing process by eliminating the need for clay minerals and enhancing the sealing effect.
Implementation Method 1
achieving impermeability with a kf value of 10−7 m/s and less
Data Source
AI summary
The invention relates to a sealing wall building material, which has a binding agent with cement and aggregates. It is provided according to the invention that the binding agent comprises a mixture of cement and fly ash, wherein it is free of clay material, and that it has an impermeability with a kf value of 10−7 m/s and less.