Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Arctic Concrete Technology
Properties of concrete were studied in three test series, which all included concretes with and without air-entrainment and with hollow plastic microspheres. Frost resistance was studied in freeze-thaw tests in the temperature range of +20 to -65 deg C. The concretes with air-entrainment underwent their tests well while the concretes without air-entrainmnet and the concretes with microspheres lost their strength much faster than in normal tests at the temperature of +20 to -20 deg C. Freezing strength was checked using the freezing temperature of -65 deg C and it was found out that the value given in the Finnish Concrete Standards, 5 MPa, is also then safe. Compressive strength and elastic modulus were tested with different moisture contents at +20, -20 and -70 deg C. The moister the concrete was, the more the compressive strength increased when the temperature decresed. The elastic modulus incresed slower than the compresive strength when the temperature was dropped and in some cases with partly dry concretes it even slightly decreased at -20 deg C. (ERA citation 11:025899)
Arctic Concrete Technology
Properties of concrete were studied in three test series, which all included concretes with and without air-entrainment and with hollow plastic microspheres. Frost resistance was studied in freeze-thaw tests in the temperature range of +20 to -65 deg C. The concretes with air-entrainment underwent their tests well while the concretes without air-entrainmnet and the concretes with microspheres lost their strength much faster than in normal tests at the temperature of +20 to -20 deg C. Freezing strength was checked using the freezing temperature of -65 deg C and it was found out that the value given in the Finnish Concrete Standards, 5 MPa, is also then safe. Compressive strength and elastic modulus were tested with different moisture contents at +20, -20 and -70 deg C. The moister the concrete was, the more the compressive strength increased when the temperature decresed. The elastic modulus incresed slower than the compresive strength when the temperature was dropped and in some cases with partly dry concretes it even slightly decreased at -20 deg C. (ERA citation 11:025899)
Arctic Concrete Technology
1984
152 pages
Report
Keine Angabe
Englisch
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