SEKE VANGU Max*, PHUKU PHUATI Edmond, EFOTO EALE Louis, MBOSEI LOBOTA Albert,MUANDA NGIMBI Robert.

Chemical and Mineralogical Characterizations by x-Rays and Monitoring of the Grindability of Clinker, Dolerite, Basalt and Metabasalt from Kongo-Central for Cement Application.
This study reports chemical and mineralogical characterization and grindability for cement purposes, of four rocks, namely: Clinker, a Dolerite, Basalt and a Metabasalt from the KongoCentral province. The compositions are determined with X-rays by spectroscopy and diffraction respectively, and grindability by means of a ball mill and Blaine permeabilimetter. The clinker is classified belitic due to its LSF factor, in the Bogue formula and the diffraction results. The tri and dicalcium silicates represent 32% and 56% respectively. These natural rocks fulfill the first condition of pozzolanicity and offer lime contents favorable for clinker substitution in the formulation of a compound cement. The minerals in the samples are: the calcium albite, the clinopyroxene, the amphibol called actinolite, a non-asbestiform variety, the epidote, the chamosite, the calcium olivine called larnite, the Hatrurite, Dioptase, Brownmillerite, biotite. Grindability shows that the clinker is hard to grind, followed by the rock of site-3, it’s harder than those two others. The Peter Von Rittinger relationship is followed at the very beginning of the grinding and with the low specific surface, at inflection of the curve appears following the incipient cohesive forces. Co-grinding and grinding ads are a solution to optimize communition. These three natural rocks can be used as a clinker substitutes. Télécharger l'article