Long-term Mechanical Properties and Microstructure of Concrete Utilizing Self-Cementing Fly Ash as A Sole Binder Material
Author(s): |
Oswyn Karsten Wattimena
Antoni Antoni Djwantoro Hardjito |
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Medium: | journal article |
Language(s): | English |
Published in: | Civil Engineering Dimension / Dimensi Teknik Sipil, 13 September 2023, n. 2, v. 25 |
Page(s): | 106-114 |
DOI: | 10.9744/ced.25.2.106-114 |
Abstract: |
Self-cementing fly ash, containing calcium oxide (CaO) of about 20%, has successfully become a sole binder material in concrete through hydration. A very low water-to-fly ash ratio, e.g., below 0.20, is the main key to achieving the high compressive strength of concrete. This study explores the strength evolution, long-term compressive strength, and mechanical properties of concrete that utilize self-cementing fly ash as a sole binder material. Remarkably, the long-term compressive strength continues to develop over a year, reaching nearly 50 MPa at 365 days, a 34% increase from the 28-day strength. While the other mechanical properties are slightly lower than predictions from empirical formulas for Portland cement concrete, promising results are observed. Scanning Electron Microscope (SEM) images highlight surface-restricted hydration products in self-cementing fly ash, rather than full dissolution of fly ash particles. |
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data sheet - Reference-ID
10744286 - Published on:
28/10/2023 - Last updated on:
28/10/2023