Study on Lightweight Concrete with Vermiculite as Fine Aggregate

S Karthik¹, A Muthadhi²

¹PG Scholar, Pondicherry Engineering College, Puducherry, India
²Assistant Professor, Pondicherry Engineering College, Puducherry, India

Abstract

Generally, concrete with low density material will have its dead weight reduced which in turn takes up reduced earthquake load. This lightweight concrete can be obtained by replacement of aggregate by materials like Scoria, Ciders, Pumice, Polystyrene beads, Perlite, Vermiculite, etc.,. In this study, exfoliated vermiculite is used as partial replacement for fine aggregate and silica fume as mineral admixture. Fine aggregate is partially replaced for M30 grade of concrete with exfoliated vermiculite from 0 to 50% by volume and Cement is partially added with silica fume from 0 to 15% by weight. Compressive strength, water absorption and Young's modulus of the concrete were tested at various ages. Results shows that there is decrease in density of concrete with increase in exfoliated vermiculite content thereby making the concrete lightweight. The compressive strength and Young's modulus of the concrete decreases with increase in exfoliated vermiculite content and increases while increasing silica fume content. On replacement of fine aggregate by 20% with exfoliated vermiculite and addition of silica fume for 15% the compressive strength was found to be comparable to that of reference mix. Hence, lightweight concrete can be obtained by using the above combination of exfoliated vermiculite and silica fume without any considerable loss in compressive strength.

Keywords

• Compressive Strength, Exfoliated Vermiculite, Lightweight, Silica Fume, Water Absorption, Young's Modulus

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Cite this Article as Follows

S Karthik, A Muthadhi. Study on Lightweight Concrete with Vermiculite as Fine Aggregate. International Conference on Global Environmental Changes and Sustainable Development (2018): 69. Print.