Cement Energy Environment

57 In 2014 the first 3 year phase of LC3 Project began with EPFL (Swiss Federal Institute of Technology Lausanne Switzerland) as head of projects and in India with IIT Delhi & IIT Chennai. In results it could be proven that LC3 achieves OPC-CEM-I qualities & suitable for a global rollout. After getting acknowledged as one of the technology with higher potential to lower CO 2 emission in cement Figure 3: KHD Calcined clay process plant Green Hydrogen Production is another drive which is coming majorly in Indian Economy. India may be the first country who has declared National Hydrogen mission to be carbon neutral by 2050. As part of initiative, R&D and private led drive it is intended to Calcined clay based cements have more potential as suitable clays are more widely available than slag and fly ash, alleviating some of the difficulty and cost of obtaining supplementary cementitious materials. They also need to be calcined at just 800°C, offering massive savings in terms of fuel costs, CO 2 emissions and embodied energy compared to Ordinary Portland Cement (OPC) production. It was also noticed when used calcined clay alone, the maximum substitution level is around 30%, which gives a moderate saving in CO 2 sector a large scale production with 0.45 Mt/yr calcined clay production line at its Rio Claro plant in Colombia was announced by Cementos Argos in February 2020.This artificial pozzolanic material, developed and promoted by the Swiss led LC3 consortium in recent years, can dramatically lower cement CO 2 emissions by replacing slag and/or fly ash in cement mixes. As Technology supplier KHD Humboldt Wedag have developed Calcined clay plant (Figure 3). emissions. However, if we substitute a further 15% of the clinker with limestone, we get a significant reduction in CO 2 emissions, with a product that has almost identical properties to the blend that contains just the calcined clay.