Production of an Eco-Cement by Clinker Substitution by the Mixture of Calcined Clay and Limestone, Songololo (DR Congo)

Ordinary Portland Cement (OPC) is by mass the largest manufactured product on Earth, responsible for approximately 6% - 8% of global anthropogenic carbon dioxide emissions (CO2) and 35% industrial CO2 emissions. On average 0.8 to 0.9 ton emitted produce one OPC. In this paper, partial substitution clinker (30% 35%) calcined clay-limestone mixture was investigated in order an eco-cement (LC3). Analyzes XRF, XRD ATG/ATD have characterized different components, determined calcination temperature selected right clay which can act as effective Supplementary Cementitious Material (SCM). Mechanical tests mortar carried out over a period 90 days. The WBCSD/WRI “Greenhouse Gas Protocol” methodology then allowed calculation into atmosphere. Three types are available Songololo Region. kaolinite principal mineral its content varies from 27% 34%. sum amorphous phase enable react with cementitious material ranges 57% 60%. SiO2 33% 76%, Alumina 12% 20% so that ratio Al2O3/SiO2 higher side (0.17 0.53). window between 750°C 850°C best SCM identified. clinker’s reduced 0.824 OPC 0.640 LC3, means 22% less compressive strengths developed LC3 vary 8.91 57.6 MPa (Day 1 Day 90), exceed those references 32.5 cement close 42.5 cement. view results, be considered trials.