Invert Emulsion Deactivator for Concrete Surface Microdeactivation
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Solution Overview
Problem
Existing surface deactivator compositions for concrete surfaces face challenges in achieving homogeneous, shallow digging depths and are sensitive to temperature changes, with limited retarding agent choices and potential inhomogeneous deactivation.
Innovation Solution
A surface deactivator composition in the form of an inverse emulsion, where the aqueous phase containing the setting retarding agent is dispersed in an oily phase, reducing the retarding agent's accessibility and activity to achieve microdeactivation, and providing robustness against temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a surface deactivator composition is formulated as an aqueous solution or suspension with setting retarder, then the deactivation function is provided, but the depth of excavation cannot be controlled to achieve low depths and homogeneous microdeactivation
Solution Approach 1:
The patent changes the physical state and dispersion medium parameters by formulating the setting retarder as an oil-soluble derivative (such as esters, amides, or ketones of carboxylic acids) dispersed in an oily continuous phase. This parameter change enables precise control of the deactivation depth and homogeneity, as the oil-soluble nature allows uniform distribution and controlled release of the retarder effect throughout the concrete matrix.
Solution Approach 2:
The invention utilizes phase transition by employing an oily continuous phase that can be applied as a liquid and then transitions to form a stable emulsion or dispersion within the concrete matrix. The oil-soluble setting retarder remains dissolved in the oily phase during application and then releases controlled amounts to the cement hydration process, enabling precise depth control through the phase behavior of the oil-concrete interface.
2Manufacturing precision
If the concentration of retarder agent is reduced to achieve low excavation depth, then microdeactivation is obtained, but inhomogeneous deactivation occurs
Solution Approach 1:
The patent changes the solubility parameter of the setting retarder by converting it to an oil-soluble derivative. This ensures that even at low concentrations required for microdeactivation, the retarder remains uniformly distributed in the oily continuous phase, preventing the inhomogeneity that would occur with water-based formulations at equivalent low concentrations.
Solution Approach 2:
The invention creates a composite deactivator system combining the oily continuous phase with dispersed oil-soluble setting retarder molecules. This composite structure ensures uniform distribution of the active ingredient throughout the formulation, maintaining deactivation homogeneity even when the overall concentration is reduced to achieve shallow excavation depths.
3Reliability
If conventional deactivator compositions are used, then deactivation function is provided, but the compositions are sensitive to temperature changes
Solution Approach 1:
The patent changes the thermal stability parameter by using an oily continuous phase with inherently lower volatility and temperature sensitivity compared to water-based systems. The oil-soluble setting retarder derivatives are selected for their thermal stability, ensuring that the deactivation performance remains reliable across a wider temperature range without the sensitivity issues of conventional aqueous formulations.
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 inverse emulsion composition allows for homogeneous microdeactivation with adjustable void depths and improved temperature stability, enhancing the deactivation process for both positive and negative deactivation applications.
Implementation Method 1
A surface deactivator composition in the form of an inverse emulsion, where the aqueous phase containing the setting retarding agent is dispersed in an oily phase
Implementation Method 2
the inverse emulsions of the invention are more robust with respect to a change in temperature than the direct emulsions, that is to say that their deactivation performances are little influenced by the temperature
Data Source
AI summary
The invention relates to an invert emulsion consisting of a continuous oil phase comprising at least one emulsifier, wherein an aqueous phase comprising at least a hydraulic binder setting retarder is dispersed. The invention also relates to positive or negative deactivation methods using the invert emulsion of the invention.