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A platform for research: civil engineering, architecture and urbanism
Prediction Models of Shrinkage and Creep in Industrial Floors and Overlays
All form of activity in a building is in need for a sound platform to be able to operate. The performance of concrete floor in industrial spaces is of importance because there are greater demands on industrial concrete floor. By making sure that the necessary recommendation regarding casting an industrial concrete floor is followed, the risk for failure is reduced. The Swedish Concrete Association (2008) recommends a w/c ratio of approximately 0.55 for industrial floors. This would result in a concrete strength class of C30/37 with an abrasive resistance adequate for most industrial floors. From an economical perspective an approach for concrete rehabilitation is the bonded overlay, which has been used for many years and has the intension to extend the life of structural concrete slabs. For concrete overlay having a matching material to the substrate is the main recommendation, in addition in a fully bonded overlay to the substrate there is less risk for cracking and edge lifting. From a mechanical perspective a crack develops when the stresses in concrete exceeds the tensile strength. Shrinkage and creep of concrete in both overlays and industrial floors are important factors that contribute in development of cracks which have considerable effect on failure of the structure; therefore it is useful to find an accurate prediction model to predict shrinkage and creep. The literature study that has been carried out in this thesis is mainly about shrinkage, creep, industrial floor, overlays and tensile stress prediction. In addition the following calculation models for prediction of creep and shrinkage of concrete have been reviewed in this paper: Eurocode 2, fib Model Code 2010, ACI 209R-92, Swedish code BBK04 and Swedish concrete manual Material. In order to study the differences between the mentioned models two example cases for calculation of shrinkage and creep in industrial floor and bonded overlay with the mentioned methods have been carried out, also the tensile stress development in bonded overlay has been ...
Prediction Models of Shrinkage and Creep in Industrial Floors and Overlays
All form of activity in a building is in need for a sound platform to be able to operate. The performance of concrete floor in industrial spaces is of importance because there are greater demands on industrial concrete floor. By making sure that the necessary recommendation regarding casting an industrial concrete floor is followed, the risk for failure is reduced. The Swedish Concrete Association (2008) recommends a w/c ratio of approximately 0.55 for industrial floors. This would result in a concrete strength class of C30/37 with an abrasive resistance adequate for most industrial floors. From an economical perspective an approach for concrete rehabilitation is the bonded overlay, which has been used for many years and has the intension to extend the life of structural concrete slabs. For concrete overlay having a matching material to the substrate is the main recommendation, in addition in a fully bonded overlay to the substrate there is less risk for cracking and edge lifting. From a mechanical perspective a crack develops when the stresses in concrete exceeds the tensile strength. Shrinkage and creep of concrete in both overlays and industrial floors are important factors that contribute in development of cracks which have considerable effect on failure of the structure; therefore it is useful to find an accurate prediction model to predict shrinkage and creep. The literature study that has been carried out in this thesis is mainly about shrinkage, creep, industrial floor, overlays and tensile stress prediction. In addition the following calculation models for prediction of creep and shrinkage of concrete have been reviewed in this paper: Eurocode 2, fib Model Code 2010, ACI 209R-92, Swedish code BBK04 and Swedish concrete manual Material. In order to study the differences between the mentioned models two example cases for calculation of shrinkage and creep in industrial floor and bonded overlay with the mentioned methods have been carried out, also the tensile stress development in bonded overlay has been ...
Prediction Models of Shrinkage and Creep in Industrial Floors and Overlays
Freidriks, Aida (author)
2015-01-01
439
Theses
Electronic Resource
English
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