Experimental investigation of fly ash geopoly...

Experimental investigation of fly ash geopolymer concrete with Alccofine and C&D waste as a coarse aggregate replacement to the natural aggregates

Author Name : Pakkirappa Uppara, Hanuman Sai Gupta .E, Sudhakar Reddy .K, Chaitanya .C.V.K

ABSTRACT

The production of cement is a highly energy intensive process which releases one-tonne of carbon dioxide (CO₂) for every tonne production of cement. In this regard, it is mandatory to find out a solution to reduce the usage of cement in the construction industry. It is studied that the geopolymer technology is an alternative method to create a binder instead of cement. The utilization of solid waste is the challenge for the civil and environmental engineers to utilize the waste from different industry to the sustainable development, and in the same time, making concrete industry sustainable in the present scenario is very important, so it is important to reduce its adverse effects on environment. While choosing the raw materials for construction it is necessary to go with eco-friendly and economical.

In the present paper, fly ash geopolymer concretes with different percentages of ultra-fine GGBS and C&D waste as a coarse aggregate replacement to natural coarse aggregates were made by mixing of sodium hydroxide and sodium silicate as alkaline activators and cured at ambient room temperature. The effects of ultra-fine GGBS and C&D waste as a coarse aggregates replacement on mechanical properties like compressive strength, Split tensile strength and Flexural strength and also durability properties were studied.