study on effect of Molarity on Mechanical properties of Geopolymer concrete using Fly ash and GGBS
Author(s):
SEETHALAKSHMI T, SAKTHIESWARAN T
Keywords:
GGBS, Flyash, Basalt fibre, Sodium silicate, Sodium hydroxide and oven curing
Abstract
The second most consumed product in the world is Cement. It contributes nearly 7% of the global carbon dio xide emission. Geopolymer concrete (GPC) manufactured using industrial waste like fly ash, GGBS is considered as a more eco-friendly alternative to Ordinary Portland Cement (OPC) based concrete. Geopolymer Concrete (GPCs) is a new class of concrete based on an inorganic alumino-silicate binder system compared to the hydrated calcium silicate binder system of concrete. It possesses the advantages of rapid strength gain, elimination of water curing, good mechanical and durability properties and are eco-friendly and sustainable alternative to Ordinary Portland Cement (OPC) based concrete. In the construction industry mainly the production of Portland cement causes the emission of air pollutants which results in environmental pollution. This paper presents the details of the studies carried out on development of strength for various grades of geopolymer concrete with varying molarity. The alkaline liquids used in this study for the geopolymerization are sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). Different molarities of sodium hydroxide solution (8M,10M and 12M) are taken to prepare different mixtures. The test specimens were 100 x 100 x 100 mm cubes, 100 x 200mm cylinders prepared and oven cured at 75ºC. The geopolymer concrete specimens are tested for their compressive strength at the age of 7,14 and 28 days. GPC mix formulations with compressive strength ranging from 12.33 to 82.10MPa have been developed. The test results indicate that the combination of fly ash and ground granulated furnace slag (GGBS) can be used for development of Geopolymer concrete
Article Details
Unique Paper ID: 142358

Publication Volume & Issue: Volume 2, Issue 1

Page(s): 108 - 112
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