Using ultrafine fly ash to achieve low-carbon, high strength and high toughness engineered cementitious composites LC-HSTC

authored by: Minjin Cai, Hailiang Zhu, Yang Wan, Hehua Zhu, Timon Rabczuk, Xiaoying Zhuang
Abstract: Conventional green engineered cementitious composites (ECC) with ordinary Grade I fly ash usually show insufficient tensile strength and toughness. To produce a low-carbon, high strength, and high toughness ECC (LC-HSTC), this study used ultrafine fly ash to substitute 80% binder mass. The ultrafine fly ash has an average size of 2.5 um, which is 5 times smaller than that of ordinary Grade I fly ash. A series of comparative tests were carried to investigate the workability, tensile behavior, tensile toughness, flexural property, compressive strength, fiber bridging ability of the LC-HSTC. Results show that the tensile strength, elongation, flexural strength, compressive strength and strain energy density of the LC-HSTC is 11 MPa, 6.5%, 27 MPa, 88 MPa and 500 kJ/m³, respectively, indicating a significant enhancement in the comprehensive performance compared to other similar materials. Sustainability analysis reveals that the cost of LC-HSTC (526.83 $/m³) is comparable to the other green fly ash ECCs and its embodied carbon (348.74 kg/m³) is over 17.75% lower than others. The findings indicate that ultrafine fly ash has significant advantages for the development of high strength and low carbon ECC.
Organisation(s): Institute of Photonics
External Organisation(s): Tongji University
Shanghai Tunnel Engineering Co. Ltd.
Bauhaus-Universität Weimar
Type: Article
Journal: Case Studies in Construction Materials
Volume: 20
No. of pages: 24
ISSN: 2214-5095
Publication date: 07.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Materials Science (miscellaneous)
Electronic version(s): https://doi.org/10.1016/j.cscm.2024.e03259 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{60cc18db97ce459bb602e1b54b27e077,
title = "Using ultrafine fly ash to achieve low-carbon, high strength and high toughness engineered cementitious composites LC-HSTC",
abstract = "Conventional green engineered cementitious composites (ECC) with ordinary Grade I fly ash usually show insufficient tensile strength and toughness. To produce a low-carbon, high strength, and high toughness ECC (LC-HSTC), this study used ultrafine fly ash to substitute 80% binder mass. The ultrafine fly ash has an average size of 2.5 um, which is 5 times smaller than that of ordinary Grade I fly ash. A series of comparative tests were carried to investigate the workability, tensile behavior, tensile toughness, flexural property, compressive strength, fiber bridging ability of the LC-HSTC. Results show that the tensile strength, elongation, flexural strength, compressive strength and strain energy density of the LC-HSTC is 11 MPa, 6.5%, 27 MPa, 88 MPa and 500 kJ/m3, respectively, indicating a significant enhancement in the comprehensive performance compared to other similar materials. Sustainability analysis reveals that the cost of LC-HSTC (526.83 $/m3) is comparable to the other green fly ash ECCs and its embodied carbon (348.74 kg/m3) is over 17.75% lower than others. The findings indicate that ultrafine fly ash has significant advantages for the development of high strength and low carbon ECC.",
keywords = "ECC, High strength, High toughness, Low carbon, Ultrafine fly ash",
author = "Minjin Cai and Hailiang Zhu and Yang Wan and Hehua Zhu and Timon Rabczuk and Xiaoying Zhuang",
note = "Publisher Copyright: {\textcopyright} 2024 The Authors",
year = "2024",
month = jul,
doi = "10.1016/j.cscm.2024.e03259",
language = "English",
volume = "20",
journal = "Case Studies in Construction Materials",
issn = "2214-5095",
publisher = "Elsevier B.V.",
}

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