Effect of NaOH and Water Contents on Solidification of Sodium Silicate Free Geopolymer

2014 ◽  
Vol 625 ◽  
pp. 3-6 ◽  
Author(s):  
Ahmer Ali Siyal ◽  
Lukman Ismail ◽  
Zakaria Man ◽  
Khairun Azizi Azizli
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fly Ash ◽  
Portland Cement ◽  
Sodium Hydroxide ◽  
Fourier Transform Infrared Spectroscopy ◽  
Setting Times ◽  
Behavior Study ◽  
Class F Fly Ash ◽  
Water Contents

Geopolymers are fast setting binder materials possessing strength comparable with Portland cement. In this study solidification and bonding behavior of sodium hydroxide activated class F fly ash geopolymers were determined. Solidification was determined using Vicat apparatus and bonding behavior study was carried out using Fourier transform infrared spectroscopy (FTIR). The decrease in solidification time from 105 minutes to 90 minutes was observed when Na/Al ratio increased from 1 to 1.4. By changing liquid to solid (L/S) ratio from 0.154 to 0.231 initial and final setting times found to increase. FTIR results showed main peaks at 1000 cm-1and 1432 cm-1due to asymmetric stretching of Al-O/ Si-O bonds.

scholarly journals Kinetics of Fly Ash Geopolymerization using Semi Quantitative Fourier-Transform Infrared Spectroscopy (FTIR); Corr Data

2019 ◽  
Vol 532 ◽  
pp. 012001 ◽  
Author(s):  
Himawan Tri Bayu Murti Petrus ◽  
Arie Satya Adelizar ◽  
Achmad Widiyatmoko ◽  
Muhammad Olvianas ◽  
Wisnu Suprapta ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fly Ash ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Kinetics Of

scholarly journals Primena elektrofilterskog pepela modifikovanog sa getitom za uklanjanje As(v) iz vodenih rastvora

2019 ◽  
Vol 31 (1) ◽  
pp. 28
Author(s):  
Milica Karanac ◽  
Maja Đolić ◽  
Zlate Veličković ◽  
Željko Kamberović ◽  
Vladimir Pavićević ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fly Ash ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
X Ray

Cilj ovog rada je ispitivanje mogućnosti primene modifikovanog oblika elektrofilterskog pepela (eng. Fly ash, FA) sa železo(III)-hidroksidom (α–FeOOH) u obliku getita (G) za efikasno uklanjanje arsena iz otpadne vode. U okviru rada izvršena je sinteza u perforiranoj koloni i dobijen je novi adsorpcioni materijal označen kao FAG. Efikasnost adsorpcije As(V) ispitana je u laboratorijskim uslovima u šaržnom sistemu, varijacijom mase adsorbenta i temperature. Izvršena je karakterizacija FA i FAG primenom: rendgenske difrakcione analize (eng. X-Ray Difraction, XRD), metode adsorpciono/desorpcione izoterme adsorpcije gasa (eng. Brunauer–Emmett–Teller, BET) i infracrvene spektrometrije sa Furijeovom transformacijom (eng. Fourier-Transform Infrared Spectroscopy, FTIR). Maksimalni adsorpcioni kapacitet FAG adsorbenta za uklanjanje As(V), izračunat je primenom Lengmirovog modela i iznosi 32,35 mg g-1. Termodinamički parametri adsorpcije za FAG/As(V) ukazali su da je proces adsorpcije spontan i endoterman.

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