Influence of rice husk ash substitution on some physical, mechanical and durability properties of the metakaolin-based geopolymer mortar
Open Access
- 28 June 2022
- journal article
- Published by Yildiz Technical University in Journal of Sustainable Construction Materials and Technologies
- Vol. 7 (2), 88-94
- https://doi.org/10.47481/jscmt.1093312
Abstract
In this study, it is aimed to investigate the influence of rice husk ash, which is a waste by-product of industrial production, on ultrasonic pulse velocity, compressive strength, flexural strength and high temperature endurance of the metakaolin-based geopolymer mortar. For this, the sand was substituted by rice husk ash (RHA) at the rate of 25%, 50% and 75% by wt. in the production of geopolymer mortar. A total of 4 series of metakaolin-based geopolymer mortars (reference series and three series with RHA substitution) were produced. In this study, the geopolymer, in other words, the binder of the mortar was produced by metakaolin and ground granulated blast furnace slag reacting with the mixture of sodium hydroxide (12M NaOH) and sodium silicate (Na2SiO3) solutions. The ratio of metakaolin and reactant mixture (12M NaOH + Na2SiO3) was determined for each series following the preliminary experiments. On the specimens produced as 50 mm cube and 40 x 40 x 160 mm prism, the intended experiments were carried out after specimens underwent curing in a dry oven at 60oC during 72 h and gained strength. The results showed that RHA could be used as a filling material in metakaolin-based geopolymer mortars, and metakaolin-based geopolymer mortars with 50% RHA substitution can be an alternative to the pure metakaolin-based mortar.Keywords
This publication has 15 references indexed in Scilit:
- Pirinç Kabuğu Külü Katkılı Harçların Dayanım Ve Dayanıklılık Özelliklerin AraştırılmasıALKÜ Fen Bilimleri Dergisi, 2020
- Rice husk ash-geopolymer compositeIOP Conference Series: Materials Science and Engineering, 2019
- Effect of rice husk ash addition on the compressive strength and thermal stability of metakaolin based geopolymerConstruction and Building Materials, 2019
- Partial replacement of metakaolin with thermally treated rice husk ash in metakaolin-based geopolymerConstruction and Building Materials, 2019
- A sludge and modified rice husk ash-based geopolymer: synthesis and characterization analysisJournal of Cleaner Production, 2019
- The use of rice husk ash as reactive filler in ultra-high performance concreteCement and Concrete Research, 2018
- Strength properties of rice husk ash-lime mortarsPublished by Taylor & Francis Ltd ,2016
- Costs and carbon emissions for geopolymer pastes in comparison to ordinary portland cementJournal of Cleaner Production, 2011
- Aplicação da cinza da casca do arroz em argamassas de assentamentoRevista Brasileira de Engenharia Agrícola E Ambiental, 2011
- The effect of alkali and Si/Al ratio on the development of mechanical properties of metakaolin-based geopolymersColloids and Surfaces A: Physicochemical and Engineering Aspects, 2007