@JournalArticle {2939,
	title = {Investigations of geopolymeric mixtures based on phosphate washing waste},
	journal = {Science and Technology of Materials},
	volume = {30},
	year = {2018},
	month = {2018-11-28 00:00:00},
	pages = {1-5},
	publisher = {Elsevier},
	abstract = {
The extraction of the phosphate ore produces a high amount of waste causing serious environmental problems. This waste, termed as phosphate washing waste, was filtered and dried at 105\ {\textdegree}C for 24\ h to remove the water. The dried waste was milled and then sieved in a 100\ μm sieve. The resulting phosphates washing waste (PWW) particles size are below 70\ μm. The phosphate washing waste was calcined at 700\ {\textdegree}C and 900\ {\textdegree}C. Both calcined and uncalcined waste were investigated with X-ray fluorescence (XRF), X-ray powder diffraction (DRX), Fourier transform infrared (FTIR), simultaneous differential thermal and thermogravimetric analyses (DTA-TG) and particle size analysis. This waste was activated with sodium hydroxide (NaOH) and sodium silicate in order to produce geopolymeric materials. The influence of replacing PWW by 15\% of metakaolin was also study. The results show that the highest compressive strength is obtained with metakaolin. The results also showed that compressive strength decreased with the increase of NaOH concentration.
},
	keywords = {Geopolymer, Phosphate washing waste, Sodium hydroxide, Sodium silicate},
	issn = {2603-6363},
	doi = {10.1016/j.stmat.2018.08.001},
	author = {Dabbebi, R. and s. Baklouti and Aguiar, J. B. and Pacheco-Torgal, F. and Samet, B.}
}