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Authors
Affiliations
1 Department of Civil Engineering, St. Peter’s University, Avadi, Chennai-600054, Tamil Nadu, IN
2 St. Peter’s College of Engineering and Technology, Avadi, Chennai-600054, Tamil Nadu, IN
Source
International Journal of Earth Sciences and Engineering, Vol 9, No 1 (2016), Pagination: 87-91
Abstract
The environmental impact of production of cement has left the construction industry with little choice but to develop an alternative material.Geopolymer synthesis has promising potential in that direction Alkali activation of alumino silicate raw marterialproduces geopolymer. Flyash is a widely used precursor in geopolymer. Flyash (FA) based geopolymer is porous and hence less durable. Metakaolin (MK) is rich in alumino silicate (Sio 2-52%, Al 2O 3-46%) and has smaller particle size (3.5 μm) and high specific area (20 m2/g) compared to flyash. MK based geopolymers are expected to give higher strength and less porous than FA based geopolymer. This research aims to investigate the use of MK asa precursor in geopolymer synthesis as a replacement for flyash in various percentages to utilize the advantages of MK over flyash. MK based concrete cured at different temperatures and various solid/liquid ratios are tested for compressive strength. Experimental investigation of FA-MK based geopolymer in this research is found to have 11% to 65% less compressive strength compared to FA based geopolymer when replaced by 10% to 40% of MK. Lesser strength is attributed to the Si/Al ratio of the MK precursor.
Keywords
Geopolymer Concrete, Metakaolin, Flyash, Compressive Strength, Alkali Activator and Sodium Silicate.
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