Thecrystallinephasesandmicrostructureofsampleswere
analyzedbyX-raydiffractometer(ModelXPertPROMPD)and
field emissionscanningelectronmicroscope(PhilipsXL30
TMP)respectively.Thecolorimetriccoordinatesoftheceramic
tiles(L, a, b values)weremeasuredusingaportablecolorimeter
(ModelHP-2131).Thecompressiontestofceramictileswas
conductedusingahydraulicuniversaltestingmachine(Model
WE-30)withamaximumloadof30t.Theconcentrationsof
variousleachabletoxicelementsintheleachingsolutionswere
measuredwithinductivecoupledplasmaemissionspectrometer
(IRISAdvantageER/S),whiletheCr(VI)contentwas
determinedwiththediphenylcarbazidespectrophotometer
methodusingamodel-722spectrophotometer.