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Nagarajan, Praveen
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article
Impact Resistance of GGBS-Dolomite Geopolymer Concrete
Abstract
<jats:title>Abstract</jats:title><jats:p>Geopolymers are new alternative binders for cement in which polymerization gives strength to concrete. The present study highlights the development of geopolymer concrete from industrial by-products such as Ground Granulated Blast furnace Slag (GGBS) and dolomite. They are obtained from steel industries and rock crushing plants respectively. Standard mix design guidelines are not available for geopolymer concrete. The trial and error method was chosen for attaining a target compressive strength of 60 MPa. Impact strength plays an important role in structures like bridges, harbours, and barriers. The present paper investigates the impact resistance of GGBS dolomite geopolymer concrete using drop weight method. Procedures of ACI Committee 544 were used, and results were compared with that of cement concrete. Cylindrical specimens having 150 mm diameter and 50mm thickness were used. Maximum impact resistance was observed when GGBS and dolomite become 80:20, which is 42% more than GGBS geopolymer concrete without dolomite.</jats:p>