Review of Non-destructive Testing Methods for the Moisture Content of Porous Building Materials
The moisture content of porous building materials significantly affects building energy consumption,structural durability,and indoor air quality.To satisfy the requirement for efficient and non-destructive measurement of moisture content,many testing methods have been proposed,which are suitable for long-term monitoring of the moisture content of building envelopes,including radioactive methods represented by the gamma-ray method,electrical methods represented by the ground penetrating radar,and thermal methods represented by the infrared thermal imaging.This paper summarized the basic principles,advantages,and disadvantages of the aforementioned three types of non-destructive testing methods.The applicability of each method in the long-term monitoring of the moisture content of building envelopes was evaluated in terms of accuracy,test depth,and convenience.The study is expected to assist researchers in better selecting the methods and testing moisture content,with the goal of evaluating and solving the moisture-related problems in building envelopes.
porous building materialbuilding envelopemoisture contentnon-destructive testing methodapplicability evaluation
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