Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Thaumasite formed by sulfate attack on mortar with limestone filler
AbstractEarly evidence of thaumasite formation in mortar with limestone filler exposed to sulfate containing tunnel water in Norway is reviewed. The problem is discussed in light of the new European cement standard allowing cements containing up to 35% limestone (e.g. CEM II/B-L) rendering them prone to detrimental sulfate attack. Experiments are performed where mortars with 20% limestone or quartz filler, respectively, are stored in 5% sodium sulfate solution saturated with gypsum at 5 °C. Length change, flexural strength and compressive strength are measured periodically for a year. The microstructure of the mortars is inspected by scanning electron microscopy and energy dispersive analyser of X-rays documenting the formation of sulfate containing species including ettringite and thaumasite.
Thaumasite formed by sulfate attack on mortar with limestone filler
AbstractEarly evidence of thaumasite formation in mortar with limestone filler exposed to sulfate containing tunnel water in Norway is reviewed. The problem is discussed in light of the new European cement standard allowing cements containing up to 35% limestone (e.g. CEM II/B-L) rendering them prone to detrimental sulfate attack. Experiments are performed where mortars with 20% limestone or quartz filler, respectively, are stored in 5% sodium sulfate solution saturated with gypsum at 5 °C. Length change, flexural strength and compressive strength are measured periodically for a year. The microstructure of the mortars is inspected by scanning electron microscopy and energy dispersive analyser of X-rays documenting the formation of sulfate containing species including ettringite and thaumasite.
Thaumasite formed by sulfate attack on mortar with limestone filler
Justnes, Harald (Autor:in)
Cement and Concrete Composites ; 25 ; 955-959
01.01.2003
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Thaumasite formed by sulfate attack on mortar with limestone filler
| Online Contents | 2003
Thaumasite formed by sulfate attack on mortar with limestone filler
| British Library Conference Proceedings | 2003
Thaumsite formed by sulfate attack on mortar with limestone filler
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INVESTIGATION OF THE CONDITIONS FOR A THAUMASITE FORM OF SULFATE ATTACK IN SCC WITH LIMESTONE FILLER
| British Library Conference Proceedings | 2003