Analysis And Assessment Of Strength In Portland Cement Concrete And Geopolymer Composites

Vol. 1 No. 4

Year: 2011

Issue: Sep-Nov

Title: Analysis And Assessment Of Strength In Portland Cement Concrete And Geopolymer Composites 

Author Name: Radhakrishna Krishna, Manjunath GS , Venumadhav T 

Synopsis: 

Compressive strength development of Portland cement concrete and geopolymer composites is studied together. In case of Portland cement concrete the bonding that takes place is by chemical reactions resulting due to combination of ionic, covalent and van der Waals forces. On the other hand, in fly ash based geopolymer composites bonding is initiated by thermal energy and chemical reaction. In both the cases, it is a constant volume hardening process. The parameters considered in case of geopolymer composites are binder, fluid content, age, curing condition, molarity of alkaline activator solution. It is observed that in both these materials the compressive strength development follow a definite path with respect to fluid-to-binder ratio by the variation of different parameters. A phenomenological model is developed by generalized Abrams' law to assess the strength. The model is further validated by using independent experimental data.