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Microwave detection and quantification of water hidden in and on building materials: implications for healthy buildings and microbiome studies
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Microwave detection and quantification of water hidden in and on building materials: implications for healthy buildings and microbiome studies
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Journal Article
Microwave detection and quantification of water hidden in and on building materials: implications for healthy buildings and microbiome studies
2019
Overview
Background
Excess water in all its forms (moisture, dampness, hidden water) in buildings negatively impacts occupant health but is hard to reliably detect and quantify. Recent advances in through-wall imaging recommend microwaves as a tool with a high potential to noninvasively detect and quantify water throughout buildings.
Methods
Microwaves in both transmission and reflection (radar) modes were used to perform a simple demonstration of the detection of water both on and hidden within building materials.
Results
We used both transmission and reflection modes to detect as little as 1 mL of water between two 7 cm thicknesses of concrete. The reflection mode was also used to detect 1 mL of water on a metal surface. We observed oscillations in transmitted and reflected microwave amplitude as a function of microwave wavelength and water layer thickness, which we attribute to thin-film interference effects.
Conclusions
Improving the detection of water in buildings could help design, maintenance, and remediation become more efficient and effective and perhaps increase the value of microbiome sequence data. Microwave characterization of all forms of water throughout buildings is possible; its practical development would require new collaborations among microwave physicists or engineers, architects, building engineers, remediation practitioners, epidemiologists, and microbiologists.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
