Assessing the pozzolanic activity of cements with added sugar cane straw ash by synchrotron X-ray diffraction and Rietveld analysis

•Sustainability is the key word in the development of new technologies.•The use of alternative materials in the cement paste is focused.•Cement pastes and cement pastes blended with Sugar Cane Straw Ashes were studied.•Our findings contribute in the phase identifications of cementitious pastes.•The pozzolanicity of the agroindustrial wastes was proven using synchrotron radiation.