Effects of waste glass and activating solution on tungsten mining waste alkali- activated binders

Author(s): Gediminas Kastiukas, Xiangming Zhou
Paper category: Proceedings
Book title: Proceedings of the International RILEM Conference
Materials, Systems and Structures in Civil Engineering 2016
Segment on Concrete with Supplementary Cementitious Materials
Editor(s): Ole M. Jensen, Konstantin Kovler and Nele De Belie
ISBN:978-2-35158-178-0
e-ISBN: 978-2-35158-179-7
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 436-445
Total Pages: 10
Language : English

Abstract: Increasingly more research is being directed towards the valorisation of waste materials as precursors for synthesizing alkali-activated binders. In this paper, varying blends of waste tungsten mine tailings (TMT) and waste glass (WG) are activated using a combined sodium hydroxide and sodium silicate alkali solution. The activating solution itself is also varied in terms of the quantities of sodium silicate and sodium hydroxide to determine their effect on reactant formation and mechanical strength. The results show that WG effectively provided additional source reactive silica, contributing to the formation of reaction products and thus making a significant improvement to the compressive strength. The TMT-WG alkali- activated binder was found to have a low activating solution demand and produced the highest compressive strength when a low Na2SiO3/NaOH activating solution combined with a low activator/precursor ratio was used.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00