Wildfire suppressant rheology. Impact of water quality on water-enhancer viscosity

https://library.fpinnovations.ca/en/permalink/fpipub8008
Author
Refai, Razim
Yang, Junyi
Tsai, Peichun Amy
Date
October 2020
Material Type
Research report
Field
Fibre Supply
Author
Refai, Razim
Yang, Junyi
Tsai, Peichun Amy
Contributor
University of Alberta
Date
October 2020
Material Type
Research report
Physical Description
25 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Wildfire Operations
Subject
Fire retardant
Retardant
Viscosity
Water
FPI TR
Series Number
Technical Report ; TR 2020 n.52
Location
Alberta
Language
English
Abstract
An important characteristic of the majority of the water-enhancing products on the wildfire suppression market is their ability to increase the viscosity of water. This increase in viscosity is linked to their performance. While performance of these products is key, there are several external variables that can influence how these suppressants physically behave. One such external variable is water quality, which is anecdotally known to impact water-enhancing products. This study aimed to understand how water quality—in particular, hardness—affects the viscosity of various water-enhancing products at different mix ratios. Understanding how water quality affects the viscosity of these products can offer insight into (1) which products are highly sensitive to water quality changes, and (2) how the target viscosity of a mixed product can be affected by water quality.
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Wildfire suppressant rheology. Mapping viscosity as a function of product mix ratios

https://library.fpinnovations.ca/en/permalink/fpipub7858
Author
Refai, Razim
Yang, Junyi
Tsai, Peichun Amy
Date
January 2021
Material Type
Research report
Field
Fibre Supply
Author
Refai, Razim
Yang, Junyi
Tsai, Peichun Amy
Contributor
University of Alberta
Date
January 2021
Material Type
Research report
Physical Description
20 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Wildfire Operations
Subject
Fire retardant
Retardant
Viscosity
Water
FPI TR
Series Number
Technical Report ; TR 2021 n.3
Location
Alberta
Language
English
Abstract
The USDA Forest Service’s Qualified Product List (QPL) provides guidance on the range of permissible mix ratios for water-enhancer products. Due to the proprietary nature of water-enhancer products, there are several unknowns about the rheology of the permissible mix ratios. This study focused on mapping the viscosity of various suppressant products as a function of their mix ratios. The results revealed a wide range of viscosities across products, with each product showing a different non-linear relationship with different mix ratios. The results from this study can help understand the optimum viscosity range to achieve desired drop characteristics during aerial operations.
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