EFFECT OF ADDED LIGNOSULFONATE SUPERPLASTICIZER ON THE SOLIDIFICATIONSTABILIZATION OF PHENOL USING PORTLAND-CEMENT TYPE-V

This study explores the interaction of phenol, a significant organic p ollutant, with cement and cement modified with a common superplasticiz er, lignosulfonate Samples of plain cement, cement doped with phenol, and superplasticized cement doped with phenol, have been examined by X -ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR ) and scanning electron microscopy/ energy dispersive spectroscopy (SE M/EDS). Leachates of these samples have been examined by UV/VIS and CC /MS. Both phenol and (lignosulfonate + phenol) have been observed to r etard the hydration of cement through specific surface chemical reacti ons. XRD and FT-IR results are consistent with surface calcium dipheno xide formation. Both phenol and (lignosulfonate + phenol) have been fo und to retard formation of Ca(OH)(2) and stabilize ettringite. Leachin g of admixture doped cement by water removed the phenol anti lignosulf onate and caused complete hydration of cement. The Charge Dispersal Mo del (CDM) has been used to explain the role of the admixtures in cemen t. The results show that the SIS process for phenol by cement has not been significantly improved by superplasticizer addition.