Box-Behnken design optimization of magnesium potassium phosphate cement properties using sodium chloride as retarder
Written by sctunisie no commentsMagnesium potassium phosphate cement (MKPC) pastes based on magnesium oxide (MgO) and potassium dihydrogen phosphate (KDP) was prepared with the addition of sodium chloride (NaCl) as retarder. The experimental results demonstrate that the use of NaCl at concentrations varied from 2 to 6% found to increase the setting time and contribute to the enhancement of final compressive strength. In order to evaluate the influence of this retarder in the total mixture and its interaction between each component, a Box-Behnken design with three variables was established. The influences of MgO/KDP ratio, Water/Binder ratio and the percentage of NaCl were studied. According to the setting time and compressive strength results, an optimum operating condition was introduced. The obtained optimal conditions were examined and analysed by X-ray diffraction (XRD) and scanning Electronic Microscopic (SEM).
I. Bouaoun, H. Hammi, A. M’nif
Magnesium potassium phosphate cement (MKPC), sodium chloride, setting time, compressive strength, Box-Behnken design
Pages 152-159
