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Advances in Materials Research
  Volume 4, Number 3, September 2015, pages 179-192
DOI: http://dx.doi.org/10.12989/amr.2015.4.3.179
 


Development of geopolymer with pyroclastic flow deposit called Shirasu
Dhruva Narayana Katpady, Koji Takewaka and Toshinobu Yamaguchi

 
Abstract
    The study presents a preliminary investigation on the applicability of Shirasu (a pyroclastic flow deposit characterized by high percentage of volcanic glass) in geopolymer. Comparative study on compressive strength and internal pore structure has been done between geopolymers with alkali activated Shirasu and fly ash as aluminosilicates. Mortar mix proportions are selected based on variations in ratio of alkaline activators to aluminosilicate and also on silica to alkali hydroxide ratio. From the experimental study, Shirasu geopolymer exhibited fairly good compressive strength. Mix proportion based on silica to alkali hydroxide ratio is observed to have profound effect on strength development.
 
Key Words
    aluminosilicate; alkali activation; geopolymer; polymerization; pyroclastic flow; Shirasu
 
Address
Dhruva Narayana Katpady: Kagoshima University, Department of Ocean Civil Engineering, 1-21-40, Korimoto, Kagoshima, Japan
Koji Takewaka and Toshinobu Yamaguchi: Department of Ocean Civil Engineering, Kagoshima University,1-21-40, Korimoto, Kagoshima 890-0065, Japan
 

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