Value KS K = 92 % indicates that clinker is medium grinded, KS K > 92% — easy to grind, KS K <92% – hard to grind. The chemical formula is MgO. In the early stages of hydration, Klein compound reacts faster than C 3 A to form ettringite. Chemical composition. Early clinker composition. Clinker occurs as lumps or nodules, usually 3 millimetres (0.12 in) to 25 millimetres (0.98 in) in diameter. The 'clinker' that has now been produced will be have just like cement, but it is in particles up to 3 cm in diameter. Excess alumina weakens the cement. Magnesia should not be present more than 2% in cement. Clinkering temperature is lowered by the presence of the requisite quantity of alumina. The expansive clinker in Type K cement is fired separately. These are ground down to a fine powder to turn the clinker into useful cement. Compound Composition of Clinker / Cement Four major compounds formed from the oxides under high temperature in the kiln Name (Oxide Notation) - Shorthand Tricalcium silicate (3 CaO.SiO 2) – C3S Dicalcium silicate (2 CaO.SiO 2) – C2S Tricalcium aluminate (3 CaO.Al 2O 3) – C3A Tetracalcium aluminoferrite (4 CaO.Al 2O 3. The phase diagram for the CaO-SiO 2 (C-S) system (shown right) was first accurately determined by Day, Shepherd and Wright in 1906.This shows that there are four stoichiometrically distinct calcium silicates (each with multiple polymorphs): CS, C 3 S 2, C 2 S and C 3 S.Portland cements contain mixtures of C 2 S and C 3 S.The zone containing Portland cements is … formula (1). Cement clinker is a solid material produced in the manufacture of Portland cement as an intermediary product. This research focused the role to study the effects and ways to control the chemical composition of clinker for better cement production. The correlations between constants A and B and the chemical parameters of the clinkers stated in the literature as affecting energy consumption during clinker grinding have been determined. The parameters used, their best relationships with A and B, and corresponding correlation coefficients are given in Table 4 . Clinker litre weight (grams/litre): A convenient supplement for free lime measurement is the more rapid determination of litre weight of clinker sample from the cooler discharge to approximately +6/-12 mm and weighing a standard 1 litre volume. The found average difference in Heat required for clinker formation between temperature 1338 °C and 1450 °C is 82.26 kJ/kg-clinker representing 2.23% of Total heat input are 3686 kJ/kg-clinker. The chemical formula is Al 2 O 3. The lower value KS K, the larger the clinker. It is produced by sintering (fusing together without melting to the point of liquefaction) limestone and aluminosilicate materials such as clay during the cement kiln stage. Typical KS K values in Portland cement clinker are 0.8-0.98, or 80-98%. Magnesia: Magnesium Oxide. Alumina imparts quick setting property to the cement. Normal range of litre-weight is 1100-1300 g/L. It is composed of a mixture of Alite, Belite, Ferrite, anhydrite and Klein compound, which has the formula C 4 A 3 S . Fe 2O 3) – C4AF heat of cement clinker, and finally getting the calculation formula of formation heat directly with chemical analysis data of raw materials and clinkers: Q a m c s f sh T C C = ⋅ + ⋅ + ⋅ − ⋅ − ⋅4.11 6.48 7.646 5.116 0.59 . Cement is a substance produced by grinding a mixture of a clay and limestone and heating to a temperature of 1450°C, in which the chemical transformation occurs inside the kiln to form new compound called clinker. ... with the formula C 3 S 2 H 3, ... 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