Physicomechanical Characteristic of Slag Geopolymer Mortar Enhanced with Multiwall Carbon Nanotube

Physicomechanical Characteristic of Slag Geopolymer Mortar Enhanced with Multiwall Carbon Nano-tube

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2015 by IJETT Journal
Volume-21 Number-1
Year of Publication : 2015
Authors : A.B.farag, A.M.Ramadan, Tarek A.Osman, H.M. Khater, Kesmat Yosri
DOI :  10.14445/22315381/IJETT-V21P210

Citation 

A.B.farag, A.M.Ramadan, Tarek A.Osman, H.M. Khater, Kesmat Yosri"Physicomechanical Characteristic of Slag Geopolymer Mortar Enhanced with Multiwall Carbon Nano-tube", International Journal of Engineering Trends and Technology (IJETT), V21(1),52-60 March 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract

The influence of multiwall Carbon nano-tubes (MWCNTs) addition on the physicomechanical properties of geopolymer mortar produced from alkaline activation of industrial aluminosilicate slag waste has been studied through the measurement of compressive strength, water absorption, fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The control geopolymer mix composed of (50:50wt., %) water cooled slag (WCS) passing 90?m and quartz sand passing 1 mm, the alkaline activator used for geopolymer activation is (6wt.,%) NaOH from the total used binder. MWCNTs added to the geopolymer mortar in ratio from 0 up to 1 wt., % with 0.2% increment from the total binder, however gelenium C-315 super-plasticizer used in the range from (1.7- 5.1%) from the total binder weight, depending on the added nano-tube, for better dispersion and prevent agglomeration of the added MWCNTs. However, MWCNTs sonicated with the added super-plasticizer which increase with MWCNTs ratios for 15 min at 40ºC for effective dispersion. The results showed that, an enhancement in the physicomechanical properties of resulted mortars with MWCNTs addition up to 0.8%, reflecting the good dispersion within the matrix, leading to strengthen and form cohesive structure, while further increase in the MWCNTs leads to agglomeration and so hinder interaction between the binding materials. Results also showed increase in compressive strength by 13% and 17% upon using 0.2 and 0.8% MWCNTs and decrease by 2 % upon using 1% MWCNTs for 90 days using mortar specimen.

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Keywords
MWCNT, Slag, dispersion, geopolymer, activation