Development of Fe500S Earth Quake Resistance TMT Rebar

Abstract

Infrastructure development is the backbone of nation’s growth. A major contribution to India’s infrastructure
has come from growth in the construction of residential/commercial buildings and high rise.. Steel is the key raw
material used in India’s predominantly RCC construction. Thermo mechanically treated rebars (TMT rebars) impart
strength and ductility to RCC structure to withstand various kinds of loads impacting a building. In the demand for
making such buildings safer, builders as well as individuals are focusing more on the quality of material used .These
days a lot of focus is given in designing structures that have high earthquake resistance. TMT bars can have high
resistance to Seismic loads due to its higher UTS/YS ratio. In view of these requirements, JSPL tookan efforts and
initiatives to develop the seismic resistant grade/quality TMT – Re-bars. These rebars are produced as per Indian
standard IS: 1786:2008.Developing this product, due consideration was given to the cost effective alloy design and
optimization of process parameters with in mill capability of JSPL. Chemistry design and cooling parameters were major
technological intervention that was judiciously used for achieving high UTS/YS ration (>1.25) in quake resistant TMTRebar.
This present paper describes the technological details of earth quake resistant TMT rebars, recently developed at JSPL.