Durability of high carbon biomass ash-based binder

Author(s): Piyush Chaunsali (1), Hugo Uvegi (2), Brian Traynor (2) and Elsa Olivetti
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 196-203
Total Pages: 8
Language : English

Abstract: Biomass residues, such as rice husk and sugar cane bagasse, are primary source of power generation for micro, small, and medium enterprises in India. Based on feedstock type and boiler temperature, composition of biomass ash varies significantly. The residual carbon content of biomass ash can be quite high, i.e., up to 25–35%, preventing its use with Portland cement. This research aims to develop a non-Portland cement binder from an Indian biomass ash having high residual carbon (loss-on-ignition of ~26%). Biomass ash binders were
formulated using biomass ash, Indo-Gangetic clay, hydrated lime and sodium hydroxide solution. The binders cured at near-ambient temperature exhibited 10–20 MPa strength after 7 days. Durability of the biomass ash binder was assessed by monitoring its water absorption, one of the key performance parameters for the masonry application. The biomass ash binder showed good water resistance as the strength was not impacted after repeated wetting and drying cycles. Moreover, 24 hours water absorption ranged from 25–37% depending on biomass ash content and bulk dry density of the binder. Chemical stability of the reaction product present in biomass ash binder was also evaluated in neutral and acidic media. In summary, this study demonstrated a value-added application of an underutilized high carbon biomass ash in masonry application.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00