Glass Powder based Geopolymer Binder for Precast Concrete

Author(s): Dipten M, Bharath M S, Deepika S and Manu Santhanam
Paper category: Proceedings
Book title: Proceeding of the 71st RILEM Annual Week & ICACMS 2017
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN:978-2-35158-195-7, 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 193-202
Total Pages: 10
Language : English

Abstract: Precast concrete is manufactured under controlled factory conditions. It offers the chance for utilization of innovative binders and special types of curing, like geopolymer binders. Geopolymer based binder systems offer the benefit of superior mechanical strength and enhanced durability against higher temperatures and corrosive liquids, in addition to utilization of materials which would otherwise be classified as waste. Geopolymeric binders need an aluminosilicate source and an alkaline activator. For the present study, glass powder (GP) was selected as the geopolymeric source material and sodium based alkali activator was used. GP was prepared using discarded glass panels which were collected and broken into small pieces and then ground to cement fineness in a ball mill. The fineness of GP was characterized using laser particle size analyzer, and X-ray diffraction revealed a very high amorphous fraction. The GP was then used to cast alkali-activated mortar specimens using waterglass and NaOH at 6 M and 8 M concentrations, which were then cured at elevated temperature of 65 °C for 72 hours. This was compared with fly ash based geopolymer mortars prepared using the same activators and curing conditions. This paper reports the relative strength and durability performance of the geopolymer mortar and concrete systems. Also, for GP mortars, a comparison between the properties developed upon curing at elevated temperatures and in the outside environment (exposed to direct sunlight) is reported.

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