A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Thaumsite formed by sulfate attack on mortar with limestone filler
Early 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 deg C. Length change, flexural strength and compressive strength are measured periodically for a year. The microstructure of the mortars is inspected by SEM and EDX documenting the formation of sulfate containing species like ettringite and thaumasite.
Thaumsite formed by sulfate attack on mortar with limestone filler
Early 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 deg C. Length change, flexural strength and compressive strength are measured periodically for a year. The microstructure of the mortars is inspected by SEM and EDX documenting the formation of sulfate containing species like ettringite and thaumasite.
Thaumsite formed by sulfate attack on mortar with limestone filler
Thaumasitbildung durch Sulfatangriff auf Kalkmörtel
Justens, H. (author)
2002
10 Seiten, 7 Bilder, 2 Tabellen, 5 Quellen
Conference paper
Storage medium
English
Thaumasite formed by sulfate attack on mortar with limestone filler
| Online Contents | 2003
Thaumasite formed by sulfate attack on mortar with limestone filler
| Elsevier | 2003
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| British Library Conference Proceedings | 2003
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