Volume 7, Issue 3 (Sept. 2009)
IJCE 2009, 7(3): 154-160 |
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Allahverdi A, Najafi Kani E. Construction Wastes as Raw Materials for Geopolymer Binders. IJCE 2009; 7 (3) :154-160
URL: http://ijce.iust.ac.ir/article-1-286-en.html
URL: http://ijce.iust.ac.ir/article-1-286-en.html
Abstract: (30961 Views)
It has been shown that geopolymerization can transform a wide range of waste aluminosilicate materials
into building materials with excellent chemical and physical properties such as fire and acid resistance. In this
research work, geopolymerization of construction waste materials with different alkali-activators based on
combinations of Na2SiO3 and NaOH has been investigated. A number of systems were designed and prepared with
water-to-dry binder ratio, silica modulus, and sodium oxide concentration were adjusted at different levels and setting
time and 28-day compressive strength were studied. The results obtained reveal that construction wastes can be
activated using a proportioned mixture of Na2SiO3 and NaOH resulting in the formation of a geopolymer cement
system exhibiting suitable workability and acceptable setting time and compressive strength. Laboratory techniques of
Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM) were utilized for studying
molecular and microstructure of the materials.
Type of Study: Research Paper |
Subject:
Structure-Earthquake
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