Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Concrete: The advanced industrial material of the 21st century
Portlandcement concrete is presented as the most widely used, yet most ignored - by the material science and engineering community - advanced industrial material. The worldwide production of concrete exceeds that of steel by a factor of 10 in tonnage and by more than a factor of 30 in volume. In other words, 1 t of concrete is produced each year for every man, woman and child, on the world. The complexity and the time, temperature, and humidity dependence of its structure and properties are described. Concrete can be produced anywhere in the world at reasonable strengths, but concrete structures are failing, not because of lack of intrinsic strength, but largely because of their exposure to increasingly hostile environments. Current research efforts in understanding the structure-property relationship and in increasing the durability of concrete are reviewed. Concrete suffers from corrosion of the reinforcing steel, especially by chloride-induced corrosion, which is currently one of the main topics of research throughout the world. The calcium hydroxide itself's is attacked by the carbonate-induced corrosion, where carbon dioxide from the atmosphere reacts with calcium hydroxide to calciumcarbonat. Between these dangerous reactions, the freeze/thaw damage seems to be the normal avoidable risk.
Concrete: The advanced industrial material of the 21st century
Portlandcement concrete is presented as the most widely used, yet most ignored - by the material science and engineering community - advanced industrial material. The worldwide production of concrete exceeds that of steel by a factor of 10 in tonnage and by more than a factor of 30 in volume. In other words, 1 t of concrete is produced each year for every man, woman and child, on the world. The complexity and the time, temperature, and humidity dependence of its structure and properties are described. Concrete can be produced anywhere in the world at reasonable strengths, but concrete structures are failing, not because of lack of intrinsic strength, but largely because of their exposure to increasingly hostile environments. Current research efforts in understanding the structure-property relationship and in increasing the durability of concrete are reviewed. Concrete suffers from corrosion of the reinforcing steel, especially by chloride-induced corrosion, which is currently one of the main topics of research throughout the world. The calcium hydroxide itself's is attacked by the carbonate-induced corrosion, where carbon dioxide from the atmosphere reacts with calcium hydroxide to calciumcarbonat. Between these dangerous reactions, the freeze/thaw damage seems to be the normal avoidable risk.
Concrete: The advanced industrial material of the 21st century
Beton - Ein moderner Baustoff des 21. Jahrhunderts
Hansson, C.M. (Autor:in)
1995
21 Seiten, 32 Bilder, 2 Tabellen, 120 Quellen
Aufsatz (Zeitschrift)
Englisch
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