Dual-energy X-ray absorptiometry for the simultaneous determination of Density and Moisture Content in Porous Structural Materials

Kurt Kielsgaard Hansen, Signe Kamp Jensen, Leif Gerward, Kulwant Singh

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch


The paper describes the dual-energy x-ray equipment, which consists of a x-ray source, filters and a detector. The x-ray beam can be moved automatically in two dimensions relative to a fixed specimen. The purpose of the equipment is to measure simultaneously the density and moisture content in porous materials relevant for the building industry. The theory of dual-energy x-ray absorptiometry (DEXA) is presented. DEXA results on two combinations of aluminium and acrylic plastic are compared with corresponding values calculated from the geometry of the experimental setup. The results from the x-ray measurements show good agreement with results from the two standard materials which imitate water in a porous material. On this background the dual-energy x-ray absorptiometry measurement principle can be used on porous structural materials.
Original languageEnglish
Title of host publicationBuilding Physics in the Nordic Countries, Proc. of the 5th Symposium
Place of PublicationGoteborg, Sweden
PublisherChalmers tekniska högskola
Publication date1999
Publication statusPublished - 1999
Event5th Symposium on Building Physics in the Nordic Countries - Gothenburg, Sweden
Duration: 24 Aug 199926 Aug 1999
Conference number: 5


Conference5th Symposium on Building Physics in the Nordic Countries

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