Reduction of Green House Gases Emission in Self Compacting Geopolymer Concrete Using Sustainable Construction Materials

摘要

The global warming is caused by emission of green house gases such as carbon dioxide and carbon monoxide into the atmosphere. The cement industry is held responsible for some of the carbon dioxide emissions, because the production of one tonne of Portland cement emits one tonne of carbon dioxide into the atmosphere. In terms of global warming the geopolymer technology could significantly reduce the carbon dioxide emission into the atmosphere caused by cement industries. This research is aimed to give awareness about the green house gas emissions from the cement manufacturing industries and the methods of reducing this by the use of fly ash ami GGBFS. Two kinds of systems have been considered in this study, 100% replacement of cement by fly ash and 100% replacement of river sand by manufactured sand. The workability of Self Compacting Geopolymer Concrete (SCGC) for various molarities was investigated and fixed to 12M. The work focused on the concrete mixes with a fixed water-to-geopolymer solid (W/Gs) ratio of 0.33 by mass and a constant total binder content of 450 kg/m~3. The workability related fresh properties for molarity of 12M of SCGC were assessed through slump flow, T_(50cm) slump flow, V-funnel, L-box and U-Box test methods. The mix proportions are arrived according to EFNARC (European Federation of National Associations Representing for Concrete) guidelines. Based on the results from workability and strength study, the results have been discussed for SCGC.