Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6711881 | Construction and Building Materials | 2018 | 10 Pages |
Abstract
The phosphate industry is facing serious environmental problems. This issue is caused by the waste after the extraction of the phosphate ore. The waste termed as phosphate washing waste (PWW) was filtered and dried at 105â¯Â°C for 24â¯h to remove the water. The dried PWW was milled, sieved in a 100â¯Âµm sieve and characterized by X-ray fluorescence (XRF). The resulting waste was calcined at 600, 700 and 800â¯Â°C, the calcined and uncalcined waste were investigated by X-ray powder diffraction (DRX), Fourier transform infrared (FTIR), simultaneous differential thermal and thermogravimetric analyses (DSC-TG) and scanning electron microscope (SEM). The PWW was activated with sodium hydroxide (NaOH) and sodium silicate to produce geopolymeric materials. It was found that the calcination temperature and the extra water added to the mixture to assure the good workability play an important role on the development of the system's workability and compressive strength.
Keywords
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Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
R. Dabbebi, J.L. Barroso de Aguiar, A. Camões, B. Samet, S. Baklouti,