S Thirugnanasambandam

Title : Route to geopymer concrete through cement replacement

Abstract:

Concrete is the most important material in the construction sector because of easy availability, high strength, fire resistance and easy to form to a required shape, etc.  Concrete is made by mixing of cement, fine aggregate, coarse aggregate and water. Every year, the need for concrete increases simultaneously and the consumption of cement also increases.  Because of the production of cement, it will release the CO₂ and it elevates the global warming.  Cement is partially replaced by Class C fly ash, Class F fly ash and GGBS.  Replacement percentage of Fly ash and GGBS varies from 0 % to 100 % with 10 % increment. The M20 grade concrete was used for all the mixes.  The age of testing of concrete is 7, 14 and 28 days, respectively. Test results show that the 7  day compressive strength of conventional concrete (C100FC0) is 22.35 MPa and 23.25MPa respectively, which is higher than the concrete using Class C and Class F fly ashes.  As the percentage of fly ash content increases the compressive strength of concrete reduces.  The 14 days and 28 days compressive strength of 20%, 30%, 40% GGBS concrete show higher strength than that of conventional cement concrete.  But at the same time the compressive strength of GGBS based concrete reduces beyond 40% of GGBS content.  The entire cement replacement is possible by means of Geopolymer Concrete.  In GPC, cement is replaced by industrial by-products such as fly ash, GGBS etc.  In GPC, an activator solution contains sodium hydroxide and sodium silicate can be used.  The compressive strength of GGBS based geopolymer 32.45 MPa which is higher than all the other combinations.
Audience take away:

• Audience will get knowledge on performance of Concrete with replacement of Cement.
•  By replacing cement completely the major problem CO₂ emission will be reduced.
• It will be useful for the other faculties to enrich their knowledge on Geopolymer Concrete.
• Geopolymer Concrete is practical solution for replacement of cement.
• Audience will gain knowledge on properties and elements of Geopolymer Concrete.
• It will be helpful to understand the characteristics of other industrial waste materials that can be used as replacement of cement.

Biography:

Dr.S.Thirugnanasambandam is presently working as Professor in Annamalai University. He obtained his Bachelor’s Degree from Government College of Technology, Coimbatore, Masters Degree and Doctoral Degree from Annamalai University. He is working in the department of Civil and Structural Engineering since 1999.  Nine of his scholars have completed Ph.D., Degree and presently guiding eight Ph.D., Scholars. He has published 112 Research articles in Journals and Conference Proceedings.  His area of interest is development of Geopolymer Concrete Products.