STUDY ON DUCTILITY AND CRACK BEHAVIOUR OF ENGINEERED CEMENTITIOUS COMPOSITES BASED FERROCEMENT
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 30, Vol 5, Issue 4
Abstract
The Reinforced cement concrete structure shows good behaviour at all loading conditions but it is bulky and has increased cost. In order to reduce the self weight the ferrocement panels can be used in place of reinforced cement concrete. As ferrocement panels are thin elements consisting of cement mortar and reinforced with closely spaced galvanised steel wire mesh it shows improved ductile behaviour. The cost of manufacture of ferrocement panel can be brought down by using engineered cementitious composite which is a fibre reinforced cement based composite material. It is systematically engineered to achieve high ductility under tensile and shear loading. It holds promise in enhancing the safety durability and sustainability of infrastructure. In this study the Engineered cementitious composites comprising of cement, fly ash, fine aggregate, high range water reducing agent and poly propylene fibre are used. The ferrocement panel due to thermal and shrinkage effects results in formation of non structural cracks. This affects the durability of ferrocement panel. These cracks can be arrested with the help of poly propylene fibers employed in ECC. The quality of ferrocement panels had been studied by Ultra-sonic pulse velocity test which is a non destructive test. The results of the test indicated excellent concrete quality grading for ferrocement panels with 1% and 1.5% of poly propylene fibers. It is evident that the fibers in ferrocement panels play a vital role in arresting cracks. The four point loading test on various panels was done using universal testing machine and the respective ductile behaviour was observed. The ferrocement panels with 1.5% poly propylene fibers shows good ductile nature after reaching its ultimate load carrying capacity. It is evident that the ferrocement panels show increased ductility with increase in the volume fraction of poly propylene fibers.
Authors and Affiliations
S. Ramesh
Keywords
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