Properties of fly ash concrete modified with hydrated lime and silica fume
MetadataShow full item record
This paper presents the results of an experimental investigation on the properties of fly ash concrete incorporating either hydrated lime or silica fume to improve the early strength of concrete. Test results indicated that the addition of lime and silica fume improved the early age compressive strength of fly ash concrete. The inclusion of silica fume was also found to increase the 28 days strength significantly. The air permeability of concrete containing lime and silica fume either decreased or remained almost the same when compared to the concrete without these. The addition of lime and silica fume also improved the sorptivity of concrete. Through the use of differential scanning calorimetry and thermogravimetric analysis (DSC/TG), it was demonstrated that the addition of hydrated lime increased the Ca(OH)2 content; whereas the addition of silica fume decreased the Ca(OH)2 content in the cement paste. The mercury intrusion porosimetry (MIP) data confirmed the beneficial action of hydrated lime and silica fume, towards decreasing the total pore volume of fly ash cement paste. © 2009 Elsevier Ltd. All rights reserved.
Showing items related by title, author, creator and subject.
Nath, P.; Sarker, Prabir (2016)Fly ash geopolymer concrete is a low-emission alternative building material to ordinary Portland cement (OPC) concrete. Previous studies mostly reported the properties of heat cured geopolymer concrete. However, heat ...
Barbhuiya, Salim; Caracciolo, Benjamin (2017)In this study, nanoindentation was conducted to extract the load-displacement behaviour and the nanomechanical properties of asphalt concrete across the mastic, matrix, and aggregate phases. Further, the performance of ...
Flexural strength and elastic modulus of ambient-cured blended low-calcium fly ash geopolymer concreteNath, P.; Sarker, Prabir (2017)Fly ash geopolymer is an emerging alternative binder with low environmental impact and potential to enhance sustainability of concrete construction. Most previous works examined the properties of fly ash-based geopolymer ...