Workability and Strength Study on Fiber Reinforced Geopolymer Concrete
The IUP Journal of Structural Engineering, Vol. XI, No. 1, January 2018, pp. 41-57
Posted: 10 Aug 2018
Date Written: January 31, 2018
Concerted efforts are on worldwide to minimize the greenhouse gas emission related to construction industry by developing environment-friendly concrete alternative to conventional concrete. The paper presents the development of Fly Ash (FA)/Ground Granulated Blast Furnace Slag (GGBFS)-based ambient cured fiber reinforced geopolymer concrete and its workability and strength characteristics with variation of binder proportion (FA and GGBFS) and superplasticizers. In the present study, Polycarboxylic (MasterPolyheed 8145 and MasterPolyheed 8146) and naphthalene (MasterRheobuild 918)-based superplasticizers were used to improve workability. Fluid-to-binder ratio was fixed as 0.6 and the ratio of sodium silicate-to-sodium hydroxide is taken as 2. The steel fiber was added to the mix in volume fraction of 1% by the volume of binder. The prepared geopolymer concrete is checked for the workability and specimens of size 150 mm x 150 mm x 150 mm were prepared. The impact of fineness of binder material is also studied. From test results, it is observed that polycarboxylic-based superplasticizer gave better workability and strength than naphthalene-based superplasticizer. Workability and the strength characteristics improved with the use of finer binder material. Further, FA:GGBFS ratio of 70:30 developed higher desired strength.
Keywords: Geopolymer, Binder Proportion, Ambient Curing, Superplasticizer, Steel Fiber
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