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    Effect of S2Cl2 Addition on the Sulfate Attack of Hydrated Portland Cement
    (Carl Hanser Verlag, 2009) Yeprem, H. Ayguel; Goekmen, Selahattin
    In this study the resistivity effect of laboratory-produced S2Cl2 as an additive in Portland cement PC 32.5 which was hydrated at the water/cement ratio of 0.5 and room temperature against sulfate attack in the curing solution of 0.35 M sodium sulfate was investigated. Hydrated cement products were determined by using X Ray Diffraction (XRD) and Thermogravimetry-Differential Thermal Analyses (TG-DTA) techniques. The additive substance, S2Cl2 in Portland cement, was used 5 and 10 percent by weight. The highest compressive strength value was found as 36.7 MPa in case of hydrated cement PC 32.5, samples containing 5 % S2Cl2 (additive) after curing time of 28 + 21 days.
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    Reactive Extraction of Formic Acid by Amberlite LA-2 Extractant
    (Amer Chemical Soc, 2009) Uslu, Hasan; Bayat, Cuma; Goekmen, Selahattin; Yorulmaz, Yavuz
    The reactive extraction of formic acid by Amberlite LA-2 dissolved in five different esters (dimethyl phthalate, dimethyl adipate, dimethyl succinate, dimethyl glutarate, diethyl carbonate), five different alcohols (isoamyl alcohol, hexan-1-ol, octan-1-ol, nonan-1-ol, decan-1-ol), and two different ketones (diisobutyl ketone (DIBK), methylisobutyl ketone (MIBK)) as diluents as well as the extraction capacity of pure diluent alone have been studied at isothermal conditions. All measurements have been carried out at 298.15 K. The comparison of physical and reactive extractions has been studied. The loading factor, T(T), extraction efficiency, E, modified separation factor, S(F), and distribution coefficients, K(D), have been calculated. The isoamylalcohol has been found to be the most effective solvent with a maximum distribution value of 19.223. Furthermore, the linear solvation energy relationship (LSER) model equation has been obtained to calculate distribution coefficients for alcohols with an R square of 0.976.