《Table 2 Slump flow diameter and slump flow time exhibited by SCGC mixes》

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《Properties of Chemically Synthesized Nano-geopolymer Cement based Self-Compacting Geopolymer Concrete(SCGC)》

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To assess the slump flow diameter and corresponding flow rate（T500mm），the fresh concrete was poured in a conventional cone，after filling the mold，the cone was lifted and flow diameter was recorded.Subsequently，the time taken by concrete to achieve 500 mm flow was also recorded and was referred as T500mm.SP dosage was kept constant for each mix based on numerous trials.Table 2 represents the slump flow diameter and T500mm achieved by each mix.It is observed in the table that increase in nanogeopolymer cement content reduced the slump flow diameter and increased T500mm.It was probably due to the adsorption of SP on the surface of fine nanogeopolymer cement particles.It was found that with the increase in alkali，activator content beyond 50 kg/m3also reduced the slump flow diameter，which resulted in an increase of T500mm.The increase in CA content also decreased the flow diameter，due to higher absorption of SP and water by porous CA.All the mixes exhibited the slump flow diameter in the range of 630-680 mm.It was found that all the mixes except S3 exhibited the flow and T500mm within the range set by EFNARC for self-compacting concrete.All nano-geopolymer cement based SCGC mixes demonstrated lower slump flow than conventional OPC based SCC，and they were found to be less workable due to the high specific surface area of the nano-geopolymer cement.