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clinker: compositional parameters. chemical parameters based on the oxide composition are very useful in describing clinker characteristics. the following parameters are widely used (chemical formulae represent weight percentages): lime saturation factor (lsf) the lime saturation factor is a ratio of cao to the other three main oxides.
the present study compares the cement hydration process and the mortar properties of samples containing calcium sulphoaluminate clinker and gypsum combined with quartz filler or limestone filler. two different calcium sulphoaluminate clinker to gypsum mass ratios are tested 5.26 and 2.50 at 20 °c and at 5 °c.
besides the reaction with c 3 s limestone can reacts with c 3 a as well. according the investigation of ingram et al. for a combination of 2% gypsum 6% limestone and 92% clinker caco 3 reacts with c 3 a in the clinker.
the key difference between gypsum and limestone is that calcium sulfate is the main constituent in gypsum whereas calcium carbonate is the main constituent of limestone. moreover gypsum is more soluble than limestone. as another difference between gypsum and limestone limestone is an acidic mineral but gypsum is a
a metered proportion of crushed dried limestone is fed to the finish grinding mill along with clinker and gypsum. in almost all cases the limestone used in plc is the same limestone used as a raw material for cementmaking at that plant.