Colloidal Silica Pretreatment for Cementitious Equipment Cleaning
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Solution Overview
Problem
Cementitious materials often adhere to equipment surfaces, leading to build-up and impairment of equipment performance, requiring labor-intensive and hazardous cleaning processes involving strong acids and mechanical tools, which are environmentally unfriendly and pose safety risks.
Innovation Solution
Applying an aqueous solution containing colloidal silica to pretreat equipment surfaces before contact with uncured cementitious materials, and using a combination of colloidal silica solutions and abrasive materials to remove cured cementitious materials, reducing adhesion and allowing for safer, more efficient cleaning without the need for harsh chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If strong acids are used to remove cured cementitious material, then the material is softened and removed, but the process becomes hazardous, corrosive, and environmentally unfriendly
Solution Approach 1:
The patent changes the chemical parameters of the cleaning solution by using colloidal silica with specific pH levels and compositions instead of strong acids. This transforms the cleaning mechanism from acid-based chemical reaction to a safer colloidal-based process that still effectively removes cured cementitious material without the harmful effects of strong acids
Solution Approach 2:
The patent employs disposable abrasive elements that can be used once and then discarded, eliminating the need for hazardous chemical cleaners. The abrasive elements provide the necessary mechanical action for removal without requiring corrosive chemicals, making the process safer and environmentally friendly
2Productivity
If mechanical tools are used to remove cured concrete, then the material is removed, but labor intensity and safety risks increase
Solution Approach 1:
The patent replaces manual mechanical tools with an automated system that uses colloidal silica solution combined with abrasive elements. The system can be applied through spraying or other application methods, reducing the need for manual labor and associated safety risks while maintaining effective removal of cured cementitious material
Solution Approach 2:
The patent introduces colloidal silica solution as an intermediary substance that facilitates the removal process. The solution prepares the surface and works with the abrasive elements to remove cured material, reducing the direct mechanical impact and labor intensity compared to using tools alone
3Reliability
If equipment is not cleaned regularly, then cementitious material build-up occurs, but cleaning frequency increases operational downtime
Solution Approach 1:
The patent applies pretreatment to equipment surfaces before cementitious material is placed. This preliminary application of colloidal silica creates a surface that resists adhesion of uncured material, significantly reducing the build-up that would otherwise require frequent and time-consuming cleaning operations
Solution Approach 2:
The patent enables continuous operation by reducing the frequency and duration of cleaning interruptions. The pretreatment and simplified cleaning process allow equipment to remain in productive use longer, minimizing downtime while maintaining reliable performance
4Object-generated harmful factors
If colloidal silica pretreatment is applied, then adhesion of uncured cementitious material is reduced, but the complexity of the process increases
Solution Approach 1:
The patent uses colloidal silica solution that serves multiple functions: it acts as a pretreatment to reduce adhesion, serves as a cleaning agent, and works with abrasive elements for removal. This multi-functionality simplifies the overall process by eliminating the need for separate chemicals and steps
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 colloidal silica pretreatment significantly reduces adhesion of uncured cementitious materials and effectively softens and removes cured materials, facilitating easier and safer cleaning processes that are environmentally friendly, reducing the need for hazardous chemicals and manual labor.
Implementation Method 1
aqueous solutions that include colloidal silica to pretreat surfaces of equipment for mixing, placing, and/or finishing cementitious materials to reduce or eliminate the adhesion of cementitious materials to pretreated surfaces
Implementation Method 2
use of abrasive materials and aqueous solutions that include colloidal silica to clean cured cementitious materials from surfaces of equipment
Data Source
AI summary
A composition capable of pretreating surfaces of equipment for use with an uncured cementitious material, such as uncured concrete includes an aqueous solution with colloidal silica. Pretreatment of a surface with such an aqueous solution may reduce or eliminate adhesion of uncured cementitious material to the surface. A composition capable of cleaning hardened and/or cured cementitious material from the surfaces of such equipment also includes an aqueous composition with colloidal silica. Hardened and/or cured cementitious material may be removed from equipment surfaces by wetting the hardened and/or cured cementitous material with the aqueous solution to soften the cementitious material, and optionally abrading the softened cementitious material to mechanically remove the same from the equipment surfaces. Systems for removing hardened and/or cured cementitious material from the surfaces of equipment capable of use with uncured cementitious material include an aqueous solution with colloidal silica and a mechanical removal component.