The Use of Microsilica in Refractory Castables - Elkem
The Use of Microsilica in Refractory Castables - Elkem
The Use of Microsilica in Refractory Castables - Elkem
- No tags were found...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Figure 12 shows the effect <strong>of</strong> citric acid addition on free flow <strong>of</strong> the ultra low cement castable.It is seen that by add<strong>in</strong>g 0.02 wt% citric acid, the free flow is ma<strong>in</strong>ta<strong>in</strong>ed for a time sufficientfor placement. Higher addition levels prolong the time till flow decay commences.120100Free flow [%]8060400.06% citric acid0.04% citric acid2000% citric acid0.02% citric acid0 50 100 150 200 250 300Time [m<strong>in</strong>utes]Figure 12: Vibra flow at 35°C as a function <strong>of</strong> time and citric acid addition. Ultralow cementcastable composition with 13 vol% water (4.10 wt%).Figur e 13 shows the effect <strong>of</strong> citric acid addition on vibra flow for the ultralow cement castable(same as <strong>in</strong> Fig. 12 but vibra flow).160 0.06% citric acid1401200.04% citric acidVibra flow [%]1008060400.02% citric acid200% citric acid00 50 100 150 200 250 300Time [m<strong>in</strong>utes]Figure 13: Vibra flow at 35°C as a function <strong>of</strong> time and citric acid addition. Ultralow cementcastable composition with 13 vol% water (4.10 wt%).
Change language