Investigation of Rice Husk Ash Substitution as An Alternative Material on Fly Ash-based Geopolymer Mortar

DOI

10.2991/978-94-6463-626-0_26How to use a DOI?

Keywords

Geopolymer; Fly Ash; Rice Husk Ash; Compressive Strength

Abstract

Portland Cement (PC), as the primary construction materials, is a significant contributor to global warming. Thus, it is important to find alternative materials that are more environmentally friendly than PC. One alternative is to utilize fly ash and rice husk ash. This paper presents the effect of rice husk ash substitution of fly ash on the strength development of fly ash-based geopolymer mortar at normal temperatures. Fly ash (FA) and rice husk ash (RHA) were used as primary materials. The alkaline activator was prepared by mixing sodium silicate and 15 Molar NaOH. The proportions of FA to RHA were 1.0: 0 to 0.75: 0.25 with the interval of 0.5, respectively. The result showed that RHA significantly affects the strength of fly ash-based geopolymer mortar. The highest compressive strength was achieved by a ratio of 95% fly ash to 5% RHA at 28-days. Increasing the RHA content by more than 10% tends to decrease the fly ash-RHA geopolymer strength. It might be attributed to the high silicate content in geopolymer from the precursor materials, i.e. fly ash and RHA, which affect the Si/Al ratio of geopolymer and leads to the strength degradation of fly ash-RHA geopolymer performance. However, RHA can be used as an alternative substitution material for fly ash in geopolymer at a specific ratio to support the green economy concept and overcome the global warming issue.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Arie Wardhono
AU  - Yogie Risdianto
AU  - Bambang Sabariman
AU  - Ninik Wahju Hidajati
PY  - 2024
DA  - 2024/12/31
TI  - Investigation of Rice Husk Ash Substitution as An Alternative Material on Fly Ash-based Geopolymer Mortar
BT  - Proceedings of the International Joint Conference on Science and Engineering 2024 (IJCSE 2024)
PB  - Atlantis Press
SP  - 263
EP  - 269
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-626-0_26
DO  - 10.2991/978-94-6463-626-0_26
ID  - Wardhono2024
ER  -