Development of New Binder Matrix in Ferrocement Studies

S.Sangesh , N.P.Rajamane, J.Baskar Sundar Raj

Abstract

Ferrocement is a light weight structural thin member, Suitable for substituting wood and for structural elements of exotic shapes such as shells, chimneys, boats, etc. Ferrocement is proved as highly durable and ductile, but because of reinforcement distributed uniformly within the volume of matrix and very rich cement mortar is used, ferrocement tend to have very high Embodied Energy and Embodied Carbon dioxide Emission. These defects are completely eliminated in the innovative study presented in this paper. Portland cement is substituted with geopolymeric binders made from fly ash and slag powder. Ferrocement specimens produced with this new binder were found to have adequate strengths. In the present study, it was found that new ferrocement without Portland cement has almost similar or even sometimes superior properties in terms of strength, durability, etc. Compared to conventional ferrocement with Portland cement as binder very high durability of this new material was proved by accelerated corrosion test in SRM University. Even after 60 days of severe corrosion condition tests by alternate wetting (salt water) and drying cycle there was no measurable corrosion. These new composites can be used for making precast elements such as casting of water tanks, innovative architectural aesthetic constructions, faster low cost durable houses, corrosion resistant pipes for sewage lines, tunnel linings in metro rail, roads and irrigation techniques. The present development of new ferrocement can become an apt substitute for conventional ferrocement, but with very low carbon footprint.