期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 15, 期 -, 页码 3028-3046出版社
ELSEVIER
DOI: 10.1016/j.jmrt.2021.09.084
关键词
Geopolymer; Cold press; Fly ash; Compressive strength; Flexural strength
资金
- Fundamental Research Grant Scheme [FRGS/1/2020/TK0/UNIMAP/02/42]
- Ministry of Higher Education, Malaysia
This research focuses on utilizing low alkali activator content and cold pressing technique to form fly ash-based geopolymers under room temperature conditions. The results demonstrate that specific parameters can lead to optimized mechanical properties in the geopolymers.
This research uses low alkali activator content and cold pressing technique for fly ash-based geopolymers formation under room temperature condition. The geopolymers were prepared using four different parameters: fly ash/alkali activator ratio, sodium hydroxide concentration, sodium silicate/sodium hydroxide ratio and pressing force. The results indicated that the compressive strength (114.2 MPa) and flexural strength (29.9 MPa) of geopolymers maximised at a fly ash/alkali activator ratio of 5.5, a 14 M sodium hydroxide concentration, a sodium silicate/sodium hydroxide ratio of 1.5 and a pressing force of 5 tons (pressing stress of 100.0 MPa and 155.7 MPa for compressive and flexural samples, respectively). The degree of reaction (40.1%) enhanced the structure compactness with minimum porosity. The improved mechanical properties confirmed that a high strength pressed geopolymer could be formed at low alkali activator content without the aid of temperature. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据