Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of steel macro fibers on cracking of thin concrete repairs
The durability of thin concrete repairs is an important problem in civil engineering. Experimental studies have shown that drying is one of the most important causes of damage at the interface between the repair material and the substrate. In the repair layer, drying induces shrinkage which is restrained by the substrate, thus causing tensile stresses, cracking and eventually debonding of the repair layer. Reinforcement with steel macro fibers can help to control cracking and could thus be used to improve the durability of repairs. An experimental study involving in situ as well as laboratory testing was undertaken to identify and understand the basic cracking mechanisms in thin concrete repairs exposed to drying. The variables studied were the repair mixture composition and the repair thickness. 'This paper presents some of the results of this study which are specifically related to the use of fibers to control cracking due to restrained shrinkage. The results show clearly that fibers have a positive influence in this type of application, particularly by reducing significantly the average crack width.
Effect of steel macro fibers on cracking of thin concrete repairs
The durability of thin concrete repairs is an important problem in civil engineering. Experimental studies have shown that drying is one of the most important causes of damage at the interface between the repair material and the substrate. In the repair layer, drying induces shrinkage which is restrained by the substrate, thus causing tensile stresses, cracking and eventually debonding of the repair layer. Reinforcement with steel macro fibers can help to control cracking and could thus be used to improve the durability of repairs. An experimental study involving in situ as well as laboratory testing was undertaken to identify and understand the basic cracking mechanisms in thin concrete repairs exposed to drying. The variables studied were the repair mixture composition and the repair thickness. 'This paper presents some of the results of this study which are specifically related to the use of fibers to control cracking due to restrained shrinkage. The results show clearly that fibers have a positive influence in this type of application, particularly by reducing significantly the average crack width.
Effect of steel macro fibers on cracking of thin concrete repairs
Laurence, O. (Autor:in) / Bissonnette, B. (Autor:in) / Pigeon, M. (Autor:in) / Rossi, P. (Autor:in)
2000
10 Seiten, 7 Bilder, 3 Tabellen, 8 Quellen
Aufsatz (Konferenz)
Englisch
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