Effect of Alkali Activators on Different Curings of Compressive Strengths of Geopolymer Concrete
- May 2, 2018
- Posted by: RSIS
- Category: Civil Engineering
International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue IV, April 2018 | ISSN 2321–2705
Effect of Alkali Activators on Different Curings of Compressive Strengths of Geopolymer Concrete
K. Jagadeeswari1, Bikash Kumar Singh2, Pandiri Harish3
Department of Civil Engineering, Vignan’s Institute of Information Technology, Visakhapatnam, Andhra Pradesh, India
Abstract: – The last two decades have experienced on any ill effects of greenhouse emissions on earth. The main effect is environmental pollution. On the other hand, due to the pollution humans are suffering from serious health problems. India is fast growing in infrastructure and plenty of construction activity is happening around. In construction industry major activity is production of Portland cement; indirectly we are increasing the CO2 content in atmosphere by the production of Portland cement.
Industrialization is the past few decades has generated million tons of wastes every year. However, their disposal has been a challenge since than the industrial by-products can be used for replacement of ordinary Portland cement, in directly reducing CO2 emission in to atmosphere. Replacement of ordinary Portland cement by industrial by-products also enhances mechanical properties of concrete. To prepare the geopolymer concrete Industrial by-products such as fly ash, ground granulated blast furnace slag, rice husk, bottom ash, etc. are mainly used in construction industry because these materials have good bonding property, increased durability and decreased the porosity.
To prepare the geopolymer concrete Industrial by-products such as fly ash, ground granulated blast furnace slag, rice husk; bottom ash, etc. are mainly used in construction industry because these materials have good bonding property, increased durability and decreased the porosity. Compare to Portland cement these materials are economically good. Further by using these industrial by products we are indirectly reducing the CO2. Portland cement with the industrial by products such as Fly Ash, Ground Granulated Blast Furnace Slag (GGBS), Rice Husk Ash, Metakaolin etc., in these materials GGBS, fly ash, rice husk are generally used for full replacement of Portland cement. Compare to Portland cement, GGBS fly ash, rice husk are also give higher compressive strength results when activated by alkali with different curing’s. This concrete is known as Geopolymer concrete.
We need alkali solutions like NaOH and Na2SiO3. Prepare the alkali solutions, by considering different molarities of NaOH like 9M and 14M and different concentrations of Na2SiO3 like 40%. Prepare the alkali solution of NaOH and Na2SiO3 separately one hour before the mixing of GPC. Prepare the cubes to find the mechanical properties such as compressive strength, and density of GPC. The specimens were tested after 28 days of different curing’s.
