Cementitious material production from hot mixing of ironmaking and steelmaking slags

AbstractA cementitious material has been produced using ironmaking and steelmaking slags. The slags in liquid condition were hot mixed with limestone addition. The mixture obtained were then slowly cooled and finally crushed. Chemical and mineralogical characterisation were carried out by X-ray flourescense spectroscopy (XRF) and X-ray diffraction (XRD). The slag based cementitious material was used as an additive to replace with ordinary Portland clinker (OPC) in production of cement. Compressive strength of concretes prepared using test cements with different compositions was measured and fragments of the concrete specimens were evaluated with scanning electron microscopy (SEM). It is concluded that a vitreous material was obtained at a temperature nearly 180°C lower than that of the clinkerisation process for traditional raw materials. The compressive strength of water cured specimens of the concretes produced from the slags and OPC cement showed that early strengths of the slag based cementitious mate...