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BEHAVIOR OF RUBBERIZED REINFORCED CONCRETE COLUMNS UNDER AXIAL LOADING
Oral Presentation
Authors
1Civil Engineering
2Assiut University
3civil engineering department, faculty of engineering, sohag university, sohag, Egypt
4civil Eng., Faculty of Engineering- Assiut University, Assiut, Egypt.
5Mining Engineering
Abstract
One of the most important concerns of the construction industry is the use of unconventional materials to facilitate building, expand service life, and reduce maintenance and rehabilitation costs. The use of recycled waste tire rubber in concrete construction is a cost-effective, sustainable, and environmentally friendly method. This study presents an experimental investigation of the behavior of rubberized reinforcedconcrete columns under axial loading. In order to fulfill the objectives of the study, four reinforced square concrete columns measuring 300×300×1200 mm were tested. Two columns were cast using normal concrete for comparison purposes, while the others were cast with rubberized concrete. The main parameters were concrete type (Normal or rubberized) and stirrups confinementconfigurations (I or II).
The performance of rubberized concrete columns was analyzed through comparison to conventional concrete columns in terms of failure pattern, energy absorption and ductility. Results showed that it is possible to develop a new type of concrete nearly as good as or better than traditional concrete and at the same time increase the ductility of the concrete while using crumb rubber in place of fine aggregates. Rubberized concrete columns didn't have excessive cracks through them and exhibited good energy absorption and ductility; the typical concrete brittle failure wasn’t observed and instead experienced a ductile failure. Maximum values were recorded in rubberized concrete column with configuration II and 150 mm spacing between stirrups (RCII150), which had an increase in ductility and absorbed energy by about 108% and 112%, respectively.
The performance of rubberized concrete columns was analyzed through comparison to conventional concrete columns in terms of failure pattern, energy absorption and ductility. Results showed that it is possible to develop a new type of concrete nearly as good as or better than traditional concrete and at the same time increase the ductility of the concrete while using crumb rubber in place of fine aggregates. Rubberized concrete columns didn't have excessive cracks through them and exhibited good energy absorption and ductility; the typical concrete brittle failure wasn’t observed and instead experienced a ductile failure. Maximum values were recorded in rubberized concrete column with configuration II and 150 mm spacing between stirrups (RCII150), which had an increase in ductility and absorbed energy by about 108% and 112%, respectively.
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