Title of article :
INVESTIGATING SHRINKAGE CHANGES OF NATURAL POZZOLAN BASED GEOPOLYMER CEMENTPASTE
Author/Authors :
Najafi Kani, E. semnan university - School of Chemical, Petroleum, and Gas Engineering, سمنان, ايران , Allahverdi, A. iran university of science and technology - School of Chemical Engineering - Cement Research Center, تهران, ايران
Abstract :
Abstract: 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
Journal title :
Iranian Journal of Materials Science and Engineering
Journal title :
Iranian Journal of Materials Science and Engineering
