Fresh and Hardened Properties of Alkali-Activated Mortar with Class F-Fly Ash, GGBS Combinations

Author(s): Mahipal Kasaniya and Prakash Nanthagopalan
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: 29-38
Total Pages: 10
Language : English

Abstract: Considering the infrastructural growth in India, the demand for cement concrete is increasing many folds leading to higher energy consumption and CO2 emissions. On the other hand, Industrial by-products especially fly ash and slag are produced in huge quantities creating environmental concerns. To balance this situation, it would be ideal to use these by-products (processed to make it suitable) as binder materials (100 %) by alkali activation instead of Portland cement in concrete. In the present study, eight mixtures were considered by replacing fly ash with ground granulated blast furnace slag (GGBS) by 10, 30 and 50% (by volume) and molarity of sodium hydroxide solution was varied as 10 and 12. The mortar samples were subjected to ambient curing and oven dry curing at 600C temperature. The compressive strength of alkali-activated mortar increases significantly as fly ash was replaced with GGBS. The compressive strength of oven cured (at 600C) specimens is higher as compared to the ambient cured specimens at all ages. For both 10 M and 12 M sodium hydroxide solution based mortars, the water absorption results are comparable.

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