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A platform for research: civil engineering, architecture and urbanism
Utilization of some waste products as a mineralizers in the formation of Portland cement clinker
Portland cement clinker is a hydraulic material which consists of at least two-thirds by mass of calcium silicates (beta-C2S, C3S), the remainder containing C3A and C4AF. The aim of the present work is to study the utilization of by-pass cement dust, phosphogypsum and granulated slag as mineralizers in the formation of portland cement clinker. Mixes with various proportions of the mineralizers and cement raw meal were fired 1200, 1300 and 1400 deg C for two hours then sudden cooled in the atmospheric air. The kinetics of formation were studied by the determination of the free lime and insoluble residue of the fired samples. The formation of the clinker was also investigated by XRD technique. The results lime and insoluble residue contents show the presence of high amount of free lime for samples fired at 1200 deg C then decreases with firing temperature up to 1400 deg C. Samples fired at 1400 deg C show complete disappearance of free lime and less than 1.40 % insoluble residue, therefore the linker is completely formed. It was found that, the slag is the most suitable mineralizer for the formation of portland cement clinker. The by-pass cement dust increases the formation of alite in the clinker due to the increase of high CaO content in the dust. Also, phosphogypsum acted as minerlizer in the formation of portland cement clinker.
Utilization of some waste products as a mineralizers in the formation of Portland cement clinker
Portland cement clinker is a hydraulic material which consists of at least two-thirds by mass of calcium silicates (beta-C2S, C3S), the remainder containing C3A and C4AF. The aim of the present work is to study the utilization of by-pass cement dust, phosphogypsum and granulated slag as mineralizers in the formation of portland cement clinker. Mixes with various proportions of the mineralizers and cement raw meal were fired 1200, 1300 and 1400 deg C for two hours then sudden cooled in the atmospheric air. The kinetics of formation were studied by the determination of the free lime and insoluble residue of the fired samples. The formation of the clinker was also investigated by XRD technique. The results lime and insoluble residue contents show the presence of high amount of free lime for samples fired at 1200 deg C then decreases with firing temperature up to 1400 deg C. Samples fired at 1400 deg C show complete disappearance of free lime and less than 1.40 % insoluble residue, therefore the linker is completely formed. It was found that, the slag is the most suitable mineralizer for the formation of portland cement clinker. The by-pass cement dust increases the formation of alite in the clinker due to the increase of high CaO content in the dust. Also, phosphogypsum acted as minerlizer in the formation of portland cement clinker.
Utilization of some waste products as a mineralizers in the formation of Portland cement clinker
Verwertung einiger Abfallprodukte als Mineralisatoren für die Bildung von Portlandzementklinkern
Helmy, I.M. (author)
Industrial Ceramics ; 23 ; 41-45
2003
5 Seiten, 5 Bilder, 3 Tabellen, 16 Quellen
Article (Journal)
English
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