Performance of GGBS Cement Concrete under Natural Carbonation and Accelerated Carbonation Exposure

One of the primary problems related to reinforced concrete structures is carbonation concrete. In many cases, depth on used evaluate service life. Factors that can substantially affect resistance are temperature, relative humidity, cement composition, concentration external aggressive agents, quality concrete, and cover. This paper investigates effect varying proportions blended Portland (ordinary (OPC) ground granulated blast-furnace slag (GGBS)) mechanical microstructural properties exposed two different CO2 exposure conditions. Concrete cubes cast with OPC, various percentages GGBS (0%, 30%, 50%, 70%) were subjected natural (indoor) accelerated exposure. The aim this present research findings authenticate literature results by using in partial replacement OPC. concretes OPC compared GGBS, assess as well rate GGBS-based concretes, under both Even though increases depth, not same percentages. A correlation made between samples 15 ± 2% carbon dioxide (CO2) those concentration. reveal products formed similar experimental tests also revealed has a lower than due consumption portlandite pozzolanic reaction. combination 70% 30% behaved enough respect exposure, being roughly equivalent control group (100% OPC). show becomes more sensitive percentage (binder ratio), rather duration curing. Concretes achieved rates carbonation.