Dipendu Bhunia
Birla Institute of Technology & Science, Pilani
India
Title: A Comparative Study between Mechanical and Physical Properties of Pozzolanic Concrete due to Effect of Carbonation
Biography
Biography: Dipendu Bhunia
Abstract
This paper deals with the accelerated carbonation of pozzolanic concrete for duration of 24 weeks. Carbonation of concrete, though considered a trouble for the steel reinforcement, there are no dearth in literature where the researchers have proved that it has greatly improved the mechanical properties of unreinforced concrete. For the present study, concrete with cement replaced by fly ash and ground granulated blast furnace slag are cured in an accelerated carbonation environment under controlled conditions of humidity and temperature for 24 weeks. The mechanical properties and durability are then studied and the results are compared with the standard concrete with no replacement. Mechanical properties that have been of keen interest are compressive strength, flexural strength and modulus of elasticity and durability tests comprised of depth of carbonation and permeable porosity. To comprehend the phase wise change of the value of pH and chemical kinetics of carbon dioxide ingress, tests are conducted for every 6 days of high CO2 exposure for 60 days.