Shrinkage Properties of HPC using Granite Powder as Fine Aggregate
Felixkala T.1, Sethuraman V. S.2
1Felixkala T, Professor, Department of Civil Engineering, Dr. M.G.R. Educational and Research Institute University, Chennai, (T.N),India.
2Sethuraman V.S, Asst. Professor, Department of Civil Engineering, Dr. M.G.R. Educational and Research Institute University, Chennai, (T.N),India.
Manuscript received on January 21, 2013. | Revised Manuscript received on February 06, 2013. | Manuscript published on February 28, 2013. | PP: 637-643 | Volume-2 Issue-3, February 2013. | Retrieval Number: C1224022313/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Shrinkage is the time-dependant decrease in concrete volume compared with the original placement volume of concrete. Shrinkage potential of a high performance concrete is perhaps the most important consideration which affects the long-term strength and durability, and hence efforts are being made to reduce the shrinkage and shrinkage cracks. The main objective of this experimental work was to investigate the shrinkage properties of concrete made with granite powder as fine aggregate and partial replacement of cement with combination of admixtures. The granite powder, one of the byproducts in stone crushing process, not being used for any applications other than filling-up low lying areas was identified as a replacement material for river sand in concrete. Admixtures such as silica fume, fly ash, slag and superplasticiser have the inherent ability to contribute to continued strength development and very high durability. In the present work, concrete made with 25% of granite powder as a replacement of sand and with 10% of Fly ash, 10% of ground granulated blast-furnace slag, 7.5% of silica fume and 1% of superplasticiser as a replacement of cement were considered. The results indicated that concrete specimens produced with admixture and granite powder has lesser shrinkage parameters like maximum length of crack, minimum width of crack, total number of cracks as compared with conventional concrete specimens. The test results also indicated that the values of both plastic and drying shrinkage strains of concrete in the granite powder with admixture concrete specimens were greater than those of ordinary concrete specimens.
Keywords: HPC, Granite powder, admixtures, plastic shrinkage, drying shrinkage and crac.