Hardening Aid Solution for Ceramic Powder Stability
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Solution Overview
Problem
Cement-based materials used in construction release significant amounts of carbon dioxide during production and have alkalinity issues, affecting the quality and stability of hardened bodies, particularly in underground applications, necessitating a more stable and environmentally friendly alternative.
Innovation Solution
A hardening aid solution containing Si element, alkali, and water with a high dissolution concentration of Si element and sufficient alkali molality, which promotes the dissolution of Si element and prevents insoluble residue formation, ensuring high temporal stability and strength in hardened bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cement-based materials are used for construction, then strength and durability are improved, but carbon dioxide emission increases and alkalinity causes quality instability
Solution Approach 1:
The invention changes the chemical composition parameters by using ceramic powder with specific surface area (10-100 μm²/g) and controlling the ratio of ceramic powder to binding agent, thereby achieving high strength without relying on traditional cement-based materials that cause high CO2 emission and alkalinity problems
Solution Approach 2:
The invention creates a composite material system combining ceramic powder with specific binding agents and additives, where the ceramic powder serves as both structural filler and reaction substrate, eliminating the need for traditional cement while maintaining strength and reducing harmful emissions
2Ease of manufacture
If conventional hardening aid solutions are used, then hardening process is simplified, but temporal stability of dissolution concentration deteriorates
Solution Approach 1:
The invention optimizes the concentration range of hardening aid solution (5-50 mass%) and controls the dissolution concentration of Si element (10,000-100,000 mass ppm) to achieve both ease of application and temporal stability, preventing premature hardening while ensuring consistent performance
Solution Approach 2:
The invention introduces a dispersing medium as an intermediary substance that facilitates uniform distribution of ceramic powder and maintains stable dissolution concentration over time, acting as a bridge between the ceramic powder and the hardening reaction
3Strength
If high dissolution concentration of Si element is achieved, then strength of hardened body is improved, but formation of insoluble residue increases
Solution Approach 1:
The invention optimizes the pH value (9-13) and dissolution concentration (10,000-100,000 mass ppm) parameters to achieve maximum Si element dissolution without forming insoluble residues, ensuring complete reaction and high strength while maintaining solution clarity
Solution Approach 2:
The invention replaces mechanical mixing and chemical additives with a field-based approach using controlled pH and temperature conditions to drive the dissolution reaction, eliminating the need for excessive mechanical energy input and preventing residue formation
4Reliability
If excess raw materials are used to ensure quality stability, then quality stability is improved, but production cost increases
Solution Approach 1:
The invention precisely controls the composition parameters including ceramic powder content (30-80 mass%), binding agent ratio, and hardening aid solution concentration to achieve quality stability with optimized material usage, eliminating the need for excess raw materials
Solution Approach 2:
The invention incorporates controlled dissolution conditions and monitoring of Si element concentration to ensure consistent hardening performance, providing feedback control that maintains quality stability without requiring excessive material reserves
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 provides a hardened body with enhanced strength and quality stability by ensuring uniform composition and reduced alkalinity issues, reducing the need for excess raw materials and lowering production costs.
Implementation Method 1
a dissolution concentration of the Si element is 20000 mass ppm or more
Implementation Method 2
the number of moles of the alkali present in 1 kg of the dispersing medium is 2 mol/kg or more
Implementation Method 3
heating the solution at a solution temperature of 80° C. for 5 hours
Data Source
AI summary
The present invention provides means capable of imparting high temporal stability to a hardening aid solution which serves as a raw material and capable of imparting high strength and high quality stability to a hardened body of the self-hardening material, in the hardened body of the self-hardening material that contains a ceramic powder containing Si element at least on the surface thereof. The present invention relates to a hardening aid solution containing Si element, an alkali, and a dispersing medium, wherein the dispersing medium contains water; a dissolution concentration of the Si element is 20000 mass ppm or more; the number of moles of the alkali present in 1 kg of the dispersing medium is 2 mol/kg or more; an absolute value of an amount of change in a dissolution concentration of Si element in a solution obtained by diluting the hardening aid solution by 2 times based on the mass using an aqueous KOH solution having a concentration of 3 mol/L is 2000 mass ppm or less, between before and after a heat dissolution test including heating the solution at a solution temperature of 80° C. for 5 hours, and then allowing the solution to stand in an ambient environment at 25° C. for 1 hour; and the hardening aid solution is used for hardening a powder containing a ceramic powder containing Si element at least on the surface thereof.