Calculation of CO2 emission of types of cement using low clinker content

Abstract

In 2020, the Global Cement and Concrete Association (GCCA) announces roadmap to achieve groundbreaking ‘net-zero’ CO₂ emissions by 2050. This makes cement the first industry to establish such a commitment globally. This paper presents how to calculate the CO₂ content in Portland cement and some cements using low clinker content such as super sulfate cement, blast furnace slag cement and multi-component cement. Calculation results show that super sulphate cement has the lowest CO2 emission of all calculated cements. The amount of CO2 emission in super sulphate cement is reduced by about 10 times compared to OPC cement, while blast furnace slag cement and multi-component cement also reduce CO2 emission by 5.4 times and 3.6 times, respectively.