Concrete structures operating under different environmental conditions are subject to the action of aggressive gaseous and liquid media, which leads to their degradation and even collapse. Even well-designed buildings, after time, can have problems to fulfil appropriate requirements concerning their further service life. In such case, the structures need renovation. Fiber reinforced mortars based on cement modified with different types of polymers are commonly used materials for renovating concrete structures. The materials are called “Reinforced PCMs” or “RPCMs”. According to current standards, repair materials should fulfil requirements concerning their high adhesion to mineral substrate, minimum tensile strength, compatibility with repaired concrete and low shrinkage. The aim of the work was to compare the performance of three reinforced PCMs based on various polymers. The following features were tested: adherence to concrete substrate, shrinkage and flexural strength. Moreover, Scanning Electron Microscopy was used to observe the interfacial transition zones among the old concrete, a bonding slurry and repair material.
Performance analysis of Reinforced Polymer Cement Mortars "RPCMs" used for repairing concrete structures
BONOPERA, Marco
2015
Abstract
Concrete structures operating under different environmental conditions are subject to the action of aggressive gaseous and liquid media, which leads to their degradation and even collapse. Even well-designed buildings, after time, can have problems to fulfil appropriate requirements concerning their further service life. In such case, the structures need renovation. Fiber reinforced mortars based on cement modified with different types of polymers are commonly used materials for renovating concrete structures. The materials are called “Reinforced PCMs” or “RPCMs”. According to current standards, repair materials should fulfil requirements concerning their high adhesion to mineral substrate, minimum tensile strength, compatibility with repaired concrete and low shrinkage. The aim of the work was to compare the performance of three reinforced PCMs based on various polymers. The following features were tested: adherence to concrete substrate, shrinkage and flexural strength. Moreover, Scanning Electron Microscopy was used to observe the interfacial transition zones among the old concrete, a bonding slurry and repair material.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
