Study on Physical and Microstructural Properties of Light Weight Aerated Fly Ash Based Geopolymer.

Author(s): T. Revathi, R. Jeyalakshmi and N. P. Rajamane
Paper category: Proceedings
Book title: Advances in Construction Materials and Systems, Vol.4
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-196-4
ISBN: 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 26-35
Total Pages: 10
Language : English

Abstract: Geopolymers are representing the most promising eco-friendly alternative to ordinary Portland cement for their higher performance characteristic and durability. Aerated light weight concrete consisting of cementitious binder with high degree of void space are popular mainly for their thermal insulation properties. In this present investigation advantage of geopolymer for its thermal resistance has been effectively used for making light weight fly
ash based geopolymer aerated by aluminium powder. Different specimens were prepared by considering the effect of influential parameters that include, liquid/binder ratio (L/B), NaOH/sodium silicate and % of Al powder and thermo-physical properties have been studied. Fly ash with substitution of 0.5% aluminium powder, (L/B) of 0.45 with sodium silicate to sodium hydroxide weight ratio of 1.0 causes best foamed specimen with a density 1005 kg/m3 and attained compressive strength of 4-5 MPa. Thermal analysis data (TGA/DTA) indicated that residual mass loss was about 2% at the temperature 1000C indicated that free water lost during the preparation of aerated specimen by the addition of aluminium. The microstructure and digital image analysis revealed that more unreacted fly ash in the specimens indicated faster foaming reaction prevent complete dissolution of fly ash.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00