Moisture measurements in building materials with microwaves

Hannu Kääriäinen; M. Rudolph; Dieter Schaurich; Kauko Tulla; Herbert Wiggenhauser

doi:10.1016/S0963-8695(01)00005-6

Moisture measurements in building materials with microwaves

Hannu Kääriäinen^*
, M. Rudolph
, Dieter Schaurich
, Kauko Tulla
, Herbert Wiggenhauser

^*Corresponding author for this work

VTT Technical Research Centre of Finland

VTT (former employee or external)
Federal Institute for Materials Research and Testing Berlin (BAM)

Research output: Contribution to journal › Article › Scientific › peer-review

26 Citations (Scopus)

Abstract

The method requires two parallel boreholes in the specimen in which two microwave antennae can be moved. The moisture content in the material can be calculated from the microwave intensity transmitted between the two boreholes. Moisture profiles along the boreholes can be obtained by moving the antennae in steps along the length of the boreholes and taking measurements at each step.

The microwave frequencies used in the laboratory measurements ranged from 8 to 16.5 GHz in steps of 0.5 GHz. The diameters of the antennae were between 7 and 9 mm, and of the boreholes between 8 and 12 mm. The microwave method produced measurement uncertainties between 0 and 2% by volume for all the materials studied in this report.

Original language	English
Pages (from-to)	389-394
Journal	NDT and E International
Volume	34
Issue number	6
DOIs	https://doi.org/10.1016/S0963-8695(01)00005-6
Publication status	Published - 2001
MoE publication type	A1 Journal article-refereed

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title = "Moisture measurements in building materials with microwaves",

abstract = "The method requires two parallel boreholes in the specimen in which two microwave antennae can be moved. The moisture content in the material can be calculated from the microwave intensity transmitted between the two boreholes. Moisture profiles along the boreholes can be obtained by moving the antennae in steps along the length of the boreholes and taking measurements at each step. The microwave frequencies used in the laboratory measurements ranged from 8 to 16.5 GHz in steps of 0.5 GHz. The diameters of the antennae were between 7 and 9 mm, and of the boreholes between 8 and 12 mm. The microwave method produced measurement uncertainties between 0 and 2\% by volume for all the materials studied in this report.",

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T1 - Moisture measurements in building materials with microwaves

AU - Kääriäinen, Hannu

AU - Rudolph, M.

AU - Schaurich, Dieter

AU - Tulla, Kauko

AU - Wiggenhauser, Herbert

PY - 2001

Y1 - 2001

N2 - The method requires two parallel boreholes in the specimen in which two microwave antennae can be moved. The moisture content in the material can be calculated from the microwave intensity transmitted between the two boreholes. Moisture profiles along the boreholes can be obtained by moving the antennae in steps along the length of the boreholes and taking measurements at each step. The microwave frequencies used in the laboratory measurements ranged from 8 to 16.5 GHz in steps of 0.5 GHz. The diameters of the antennae were between 7 and 9 mm, and of the boreholes between 8 and 12 mm. The microwave method produced measurement uncertainties between 0 and 2% by volume for all the materials studied in this report.

AB - The method requires two parallel boreholes in the specimen in which two microwave antennae can be moved. The moisture content in the material can be calculated from the microwave intensity transmitted between the two boreholes. Moisture profiles along the boreholes can be obtained by moving the antennae in steps along the length of the boreholes and taking measurements at each step. The microwave frequencies used in the laboratory measurements ranged from 8 to 16.5 GHz in steps of 0.5 GHz. The diameters of the antennae were between 7 and 9 mm, and of the boreholes between 8 and 12 mm. The microwave method produced measurement uncertainties between 0 and 2% by volume for all the materials studied in this report.

U2 - 10.1016/S0963-8695(01)00005-6

DO - 10.1016/S0963-8695(01)00005-6

M3 - Article

SN - 0963-8695

VL - 34

SP - 389

EP - 394

JO - NDT and E International

JF - NDT and E International

IS - 6

ER -

Moisture measurements in building materials with microwaves

Abstract

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