CEE Jan-Mar 2012

Table 5. Chemical analyses results of the alinite clinker specimens CO''lDOSrtron A1050-60 A1 050-90 A1100·60 A1100-90 A1150-60 A1150-90 A1200·60 A1200-90 A1200·180 LOI 4.82 4.41 4.19 3.08 1.93 1.82 1.26 0.39 0.18 Free CaO 2.39 2.30 1.96 1.83 1.57 1.51 1.14 1.05 0.12 SiOz 19.91 20.39 20.30 20.79 20.97 21.42 21.43 21.72 23.60 Alz0 3 5.90 5.94 5.96 6.13 6.13 6.23 6.32 6.50 6.86 FezD3 3.39 3.41 3.31 3.36 3.32 3.40 3.47 3.51 3.66 CaO 50.60 51.21 52.56 53.52 55.12 55.56 55.48 56.74 57.01 MgO 2.75 2.79 2.82 2.87 2.90 2.96 2.99 3.01 3.09 503 3.44 3.48 3.21 3.32 3.35 3.28 3.5~ 3.41 3.14 NazO 1.33 1.15 1.18 0.93 0.74 0.56 0.51 0.42 0.28 ~0 0.35 0.28 0.28 0.15 0.11 0.04 0.07 0.04 0.03 cr 5.12 4.64 4.60 4.02 3.86 3.20 3.80 3.21 2.03 Results of chemical analysis Counts 1050t60m AJ+B The results of the chemical EKXl AJ. AWII!e analyses of alinite clinker A- Alllo specimens are given in Table 5. 8-S.!lle M C.'Oi01l~ Since the raw mix for all clinker 600 F.f.,llla specimens is the same, the l -FrNllme chemical analyses results do not 1(. a..w show much deviation. The main p Per!CiaM remarkable difference between 400 I !> C.la.rn CNoi1CII ~le s A Sut~ the specimens is in loss on M I Calcoum IrOn ~It ignition (LOI). Increasing the burning temperature and l 200 p duration caused a decrease in the values of LOI. The reason of ~ lL1..t .~ ~ ~ ~~~~ that difference is that at higher 0 burning temperatures the 20 00 conversion of the CaC0 3 to CaO 10 XI 40 50 POSihOn 1"2Thtlt l increases and more C0 2 comes Figure2. XRD pattern of A1050-60 clinker waste out. In other worlds, this reveals more complete burning. Counlt Moreover, as seen from the 600 1350T10M Al+B AJ. ~ table the free lime also A· A.Illt decreased by increasing burning I B· BtMe temperature and duration. M-C......~ These data indicate whether the f.'f1<.. burning is fully completed or not. .coo l· f••umt Therefore, Free lime and LOI p.~ M obtained at a temperature of s C:llc:lum C!llondt S.C.. SIMall 1200°C can be taken as ~C........ 11oft- complete clinkerization. A Furthermore, as seen in Table m s 5, as the maximum duration temperature increased , the l p oxi de compounds by weight per 0 ~~.ut ~l iW~ cent were increased. This was presumed to be due to the decrease in the loss on ignition 10 ~ X, .cO 50 sO and free lime val ues. Moreover, Po~l(ln I.,Th~U•l the decrease in cr contents with Figure 3. XRD pattern of A 1350-10 clinker increasing temperature is attributed to its volatilit . y 17