Does phosphorus affect the industrial Portland cement reactivity?

The effect of phosphorous on the mineralogy and reactivity of Portland cement has been investigated through an industrial clinkers series. The samples were collected from the same Tunisian cement plant and classified according to the content of P205 from 0.5% to 1.1%. All samples were manufactured at the same thermal and cooling conditions as well as possible. The specimens were characterized by X-ray fluorescence spectrometry and optical microscopy techniques and their mineralogy was determined by X-ray powder diffraction coupled to the Rietveld analysis. The cements reactivity prepared from the clinkers was followed by means of isothermalcalorimetry. The compressive strength of the cement pastes was measured. The results revealed that the content of phosphorous in this range has not a significant influence on the clinkers mineralogy cement reactivity and concrete performance. (C) 2018 Elsevier Ltd. All rights reserved.