Performance characteristic of sustainable ternary cements

Abstract

Cement production leads to an emission of approximately 0.87 ton of CO2 for each ton of cement produced, which accounts for 7-8% of global CO2 emissions. To minimize these emissions, various alternative materials or waste products from other industries having pozzolanic or cementitious properties are used. Development of blended cement consisting of Portland cement along with two different SCMs (Supplementary cementitious Materials) has been increased in past two decades. Use of combination of Slag-Fly Ash and Calcined Clay-Limestone based Portland cement has increased in recent times. In the view of the above, present study is focused on, composite cement (Slag-Fly Ash-Portland Cement) and limestone calcined clay cement (Calcined Clay-Limestone-Portland cement), having clinker content as low as (50%). Further, concrete specimens were cast at two different water to cement ratio and various properties of concrete such as compressive strength, porosity and sorptivity were assessed. The performance of ternary cement produced by adding two different SCMs with high clinker replacement showed equivalent performance as of Portland Pozzolana Cement.