Volume 8, Issue 3 (september 2011 2011)                   IJMSE 2011, 8(3): 50-60 | Back to browse issues page

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E. Najafi Kani, A. Allahverdi. INVESTIGATING SHRINKAGE CHANGES OF NATURAL POZZOLAN BASED GEOPOLYMER CEMENTPASTE. IJMSE 2011; 8 (3) :50-60
URL: http://ijmse.iust.ac.ir/article-1-381-en.html
INVESTIGATING SHRINKAGE CHANGES OF NATURAL POZZOLAN BASED GEOPOLYMER CEMENTPASTE
E. Najafi Kani , A. Allahverdi
Abstract:   (21881 Views)
Shrinkage behavior of a geopolymer cement paste prepared from pumice-type natural pozzolan was studied
by changing parameters of chemical composition including SiO2/Na2O molar ratio of activator and total molar ratios
of Na2O/Al2O3, and H2O/Al2O3. For investigating the effect of curing conditions on shrinkage, hydrothermal curing
was also applied. The obtained results clearly revealed the governing effect of chemical composition on shrinkage.
Mixes with different Na2O/Al2O3 molar ratios exhibited different shrinkage behavior due to variations made in
SiO2/Na2O molar ratio. Application of hydrothermal curing after a 7-day period of precuring in humid atmosphere
also showed strong effect on shrinkage reduction.
Keywords: Geopolymer cement, Shrinkage, Chemical Composition, Curing, Natural Pozzolan
Full-Text [PDF 228 kb]   (5877 Downloads)    
Type of Study: Research Paper | Subject: materials engineeing and special subjects
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