Abstract:
Every year, about 25 billion tonnes of concrete is manufactured globally. Ordinary
Portland Cement (OPC) being the major ingredient of concrete, is responsible for about
8% of total Carbon Dioxide (CO2) emissions worldwide. This calls for an alternative
binder such as Alkali Activated Concrete (AAC). However, handling of liquid alkaline
activator for AAC at site is an issue due to its corrosive nature. Hence, One Part AAC
(OPAAC) is being developed which comprises of dry ingredients activated by just adding
water. OPAAC is considered as an environment friendly alternative to OPC concrete.
Apart from that, extensive use of Coarse Aggregate in concrete is a burden on the limited
sources of aggregate. There is a dire need of recycling construction and demolition waste
after proper treatment, in order to preserve the depleting mining quarries. Recycling
concrete aggregates controls the dumping of demolition waste in landfills and strongly
supports the concept of Circular Economy. Hence, this research is aimed at developing a
green concrete by incorporating Recycled Concrete Aggregate (RCA) in OPAAC after
suitable treatment methods. To evaluate the effect of treatment methods on RCA, Physio Mechanical study has been done. Furthermore, Life Cycle Assessment (LCA) has also
been performed to assess the impact of OPAAC on different impact categories. It will be a
pathway to Green and user-friendly concrete.
