An Experimental Investigation on Influence of Calcination Condition on Strength of Lc3 Concrete

Abstract

A new kind of low-carbon cement called limestone calcined clay cement (LC3) may match the performance requirements of regular cement while using less energy and emitting less carbon dioxide. Waste resources are now being used more often as prospective replacements for conventional materials in the effort to produce cementitious materials for concrete more sustainably. This study has looked at how calcined clay affects cementitious mortars' engineering qualities. Calcined clay was used as a partial replacement for Portland cement at 50%, 47%, and 45% after being created by heating raw clay to temperatures between 700oC to 900oC. Seventy two LC3 concrete cubes and twelve M20 grade concrete cubes of size 15 x 15 x 15 mm were casted and curing was done for 28 days. The compressive strength after 3, 7, 14 and 28 days of curing was identified and compared the result with standard M20 grade concrete cube. The outcomes demonstrated that calcined clay was appropriate for strengthening the characteristics of concrete if it is calcined properly. Despite having a little impact on the mortar's workability, a greater strength was attained when 47% of Portland cement was replaced with calcined clay and limestone powder.