• RAJESH SINGH GHOSHEE
• RAJESH JHOSHI

Usage of cement as binder of aggregates has been a standard practice in any construction site since cement can be conveniently used for in situ concreting with good strength. Manufacture of concrete is an energy-demanding process and causes pollution. Geopolymer Concrete (GPC) is an advanced eco-friendly concrete manufactured by activating source material rich in alumina and silica by alkaline liquids to form aluminosilicates based inorganic polymers.Adopting GPC to replace cement concrete can solve the problem of unsustainable usage of limestone and pollution related to the manufacturing process of cement since the ingredients utilized are waste products such as fly ash and GGBS. Sustained and effective polymerization reaction between source materials and alkaline liquids is possible at elevated temperatures around 90°C. Due to this factor, GPC has limited usage for in situ application. Ambient cured GPC exhibited average strength and increased setting time. To achieve high strength and curing at ambient temperature, GPC needs to be modified with replacement and addition of certain ingredients, this influences strength and curing conditions. The addition of OPC as admixture amplifies the binding process and improves the strength. The combined effect of adding OPC and GGBS facilitates ambient curing for the GPC with high strength. Gujcon CFR fibre was added to the mix to constrain the formation of shrinkage cracks and prevent the effects of thermal variation. Ultimate strength was achieved through this modification with improved elastic properties due to the influence of fiber reinforcement. The experimental program was intended for examining mechanical and durability characteristics of modified GPC. The modified GPC was aimed at producing high strength, ambient cured concrete for the in situ application. A sequence of tests to check the key properties of GPC in the fresh and solid state was performed in accordance with relevant standards and procedures. Compressive strength was checked for each mix by testing cubes of standard size. In this investigation, it was found that strength increased gradually with GGBS replacing fly ash. Further increment in strength was achieved by the addition of OPC as admixture and Gujcon CRF fibre as secondary reinforcement. The investigation on strength characteristics and durability of GPC resulted in a hybrid concrete which was superior in strength and durability attributes. Adoption of geopolymer technology ensures sustainable and eco-friendly manufacturing process without the need of high temperature for curing which makes the concrete ideal for in situ application.

Fly-Ash, GPC, GGBS

"Review of Properties of Geo-Polymer Concrete (GPC) with Addition of Fly Ash", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 3, page no.c48-c53, March-2022, Available :http://www.jetir.org/papers/JETIR2203209.pdf

"Review of Properties of Geo-Polymer Concrete (GPC) with Addition of Fly Ash", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 3, page no. ppc48-c53, March-2022, Available at : http://www.jetir.org/papers/JETIR2203209.pdf