Asphalt Emulsion Drying Using Separate Emulsion Breaker Application
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Solution Overview
Problem
Asphalt emulsions used in roofing and waterproofing applications dry slowly, limiting project completion times and making them vulnerable to rain, as existing methods require expensive two-component sprayers or undesirable mixing of emulsion-breakers with the emulsion.
Innovation Solution
Applying an emulsion-breaking agent to the substrate before or after applying the asphalt emulsion, or using an emulsion-breaking agent-impregnated reinforcing sheet, to break the emulsion and speed up drying without needing a two-component sprayer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If an emulsion-breaking agent is mixed with the asphalt emulsion before application, then the emulsion dries rapidly, but the emulsion's working time is reduced and the application process becomes more complex
Solution Approach 1:
The patent divides the application process into two separate steps: first applying the asphalt emulsion to the substrate, then applying the emulsion-breaking agent separately. This segmentation allows the emulsion to be applied and worked with normally first, then broken separately to control drying time, resolving the contradiction between rapid drying and adequate working time
Solution Approach 2:
The patent applies the emulsion-breaking agent to the substrate before applying the emulsion, creating a pre-prepared surface that will break the emulsion upon contact. This preliminary action ensures rapid drying is achieved without needing to mix the breaker with the emulsion beforehand, preserving the emulsion's working time and application properties
2Loss of time
If a two-component sprayer is used to co-spray the emulsion and emulsion-breaking agent, then the emulsion dries rapidly, but the equipment cost and operational complexity increase
Solution Approach 1:
The patent separates the application of the emulsion and the emulsion-breaking agent into two distinct steps using a single-component sprayer. This eliminates the need for complex two-component sprayer equipment while still achieving rapid drying, as the breaker is applied separately after or before the emulsion
Solution Approach 2:
The substrate serves as an intermediary medium that facilitates the interaction between the emulsion and the emulsion-breaking agent. By applying the breaker to the substrate first (or second), the system uses the substrate as a mediator to achieve emulsion breaking without requiring complex co-spraying equipment
3Productivity
If the emulsion-breaking agent is applied to the substrate before the emulsion, then the emulsion dries rapidly and subsequent coatings can be applied immediately, but the application process requires additional steps
Solution Approach 1:
The patent applies the emulsion-breaking agent to the substrate before applying the emulsion, preparing the surface in advance to ensure rapid breaking and drying. This preliminary action enables faster project completion and allows subsequent coatings to be applied immediately, with the additional step being offset by the time savings in overall project duration
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
This method allows for rapid drying of asphalt emulsions, enabling quicker project completion, reduced labor costs, and increased flexibility in application times, even allowing for immediate application of subsequent coatings like reflective acrylic emulsions.
Implementation Method 1
contacting the asphalt emulsion with an emulsion breaker to break the emulsion and liberate the aqueous phase
Implementation Method 2
liberate the aqueous phase for rapid evaporation
Data Source
AI summary
The drying time for aqueous asphalt emulsions used in the roofing and other waterproofing industries is shortened by separately applying an emulsion breaking agent to the substrate to be waterproofed, to the aqueous asphalt emulsion after it is applied, or both.