Colloidal Silica Pretreatment for Cementitious Equipment Cleaning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Equipment used for mixing, placing, and finishing cementitious materials often becomes coated with uncured and cured cementitious materials, leading to build-up that hinders functionality, requires harsh chemicals for removal, and poses safety risks due to mechanical removal methods and hazardous waste disposal.
Innovation Solution
Applying an aqueous solution containing colloidal silica to pretreat equipment surfaces before contact with uncured cementitious materials and using the same solution with abrasives to remove cured materials, reducing adhesion and facilitating safe, environmentally friendly cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If strong acids are used to remove cured cementitious material, then the removal effectiveness is improved, but environmental harm and safety risks increase
Solution Approach 1:
The patent replaces the chemical system (strong acids) with a mechanical system (abrasive materials such as granular abrasives, abrasive pads, or abrasive brushes) to remove cured cementitious material. This substitution eliminates the environmental and safety hazards associated with strong acids while maintaining effective removal capability through mechanical abrasion.
Solution Approach 2:
The patent introduces water as an intermediary medium to facilitate the mechanical removal process. Water activates the abrasive materials, creates a slurry that enhances abrasion effectiveness, and provides a safe alternative to strong acids. The water-abrasive combination achieves effective concrete removal without the harmful effects of chemical acids.
2Productivity
If tools are used to mechanically remove cured concrete, then removal capability is improved, but labor intensity and safety risks increase
Solution Approach 1:
The patent employs hydraulic action by using water under pressure to deliver abrasive materials to the concrete surface. This hydraulic delivery system replaces manual tool operation, significantly reducing labor intensity while maintaining or improving removal capability. The pressurized water-abrasive mixture automatically applies force to the concrete, eliminating the need for manual swinging of heavy tools.
Solution Approach 2:
The patent changes the parameters of the removal process by using a slurry mixture of water and abrasive materials instead of dry mechanical impact. This parameter change (from dry mechanical to wet abrasive) reduces dust generation, lowers labor intensity, and improves safety while maintaining effective concrete removal capability.
3Reliability
If equipment surfaces are not pre-treated, then adhesion of uncured cementitious material increases, but cleaning complexity increases
Solution Approach 1:
The patent applies a preliminary coating of abrasive materials or water to equipment surfaces before uncured cementitious material contacts the surface. This preliminary action creates a barrier that prevents adhesion, eliminating the need for subsequent complex cleaning operations. By preparing the surface in advance, the patent simplifies the overall cleaning process while ensuring reliable adhesion reduction.
Solution Approach 2:
The patent uses water or abrasive particles as an intermediary layer between the equipment surface and the uncured cementitious material. This intermediary prevents direct contact and adhesion between the cementitious material and the equipment surface, thereby reducing cleaning complexity and improving reliability of the non-adhesive property.
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 solution effectively reduces adhesion of uncured materials and enhances the removal of cured materials without the need for strong acids, making the process safer and more environmentally friendly, while avoiding the hazards associated with mechanical removal.
Implementation Method 1
applying an aqueous solution that includes colloidal silica to a surface of the equipment before uncured cementitious material comes into contact with the surface
Implementation Method 2
The colloidal silica solution effectively reduces adhesion of uncured materials
Implementation Method 3
using the same solution with abrasives to remove cured materials
Data Source
AI summary
A composition for pretreating surfaces of equipment for use with an uncured cementitious material, such as uncured concrete, and/or for cleaning cured cementitious material from the surfaces of such equipment 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. Cured cementitious material may be removed from equipment surfaces by wetting the cured cementitious material with the aqueous solution to chemically soften the cured cementitious material, along with abrading the cured cementitious material to mechanically remove the same from the equipment surfaces. Systems for removing cured cementitious material from the surfaces of equipment configured to use with uncured cementitious material include an abrasive element and an aqueous solution with colloidal silica.