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A platform for research: civil engineering, architecture and urbanism
The measurement of paste content in hardened concrete using automatic image analyzing technique
AbstractThis paper describes a technique for the measurement of paste contents of mortars and concretes. The technique involves etching the polished surfaces of samples with a saturated solution of salicylic acid in 80:20 methyl alcohol: water mixture which does not affect limestone aggregates. The contrast difference between the exposed aggregates and the etched areas is then enhanced by painting the aggregates black and filling the etched areas with a white powder. An automatic image analyzer can then measure either the blackened aggregates or the whitened etched areas.
ZusammenfassungArtiklen beskriver en metode for måling af pasta indhold i mørtel eller beton. Den forudsætter en ætsning af en slebet overflade i en mættet salicylsyre opløsning i 80:20 blanding af methylalkohol/vand. Denne opløsning angriber ikke kalkpartikler. Kontrast forskellen mellem de frilagte partikler og den ætsede overflade er siden understreget ved at farve partiklerne sorte og fylde de ætsede områder med hvidt pulver. De således frembragte sorte eller hvide områder kan siden måles ved hjælp af automatisk billed analyse.
The measurement of paste content in hardened concrete using automatic image analyzing technique
AbstractThis paper describes a technique for the measurement of paste contents of mortars and concretes. The technique involves etching the polished surfaces of samples with a saturated solution of salicylic acid in 80:20 methyl alcohol: water mixture which does not affect limestone aggregates. The contrast difference between the exposed aggregates and the etched areas is then enhanced by painting the aggregates black and filling the etched areas with a white powder. An automatic image analyzer can then measure either the blackened aggregates or the whitened etched areas.
ZusammenfassungArtiklen beskriver en metode for måling af pasta indhold i mørtel eller beton. Den forudsætter en ætsning af en slebet overflade i en mættet salicylsyre opløsning i 80:20 blanding af methylalkohol/vand. Denne opløsning angriber ikke kalkpartikler. Kontrast forskellen mellem de frilagte partikler og den ætsede overflade er siden understreget ved at farve partiklerne sorte og fylde de ætsede områder med hvidt pulver. De således frembragte sorte eller hvide områder kan siden måles ved hjælp af automatisk billed analyse.
The measurement of paste content in hardened concrete using automatic image analyzing technique
Gudmundsson, Halldor (author) / Chatterji, S. (author) / Jensen, A.Damgaard (author) / Thaulow, Niels (author) / Christensen, Preben (author)
Cement and Concrete Research ; 9 ; 607-612
1979-06-12
6 pages
Article (Journal)
Electronic Resource
English