Details
| Original language | English |
|---|---|
| Article number | e03259 |
| Number of pages | 24 |
| Journal | Case Studies in Construction Materials |
| Volume | 20 |
| Early online date | 10 May 2024 |
| Publication status | E-pub ahead of print - 10 May 2024 |
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
ASJC Scopus subject areas
- Materials Science(all)
- Materials Science (miscellaneous)
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In: Case Studies in Construction Materials, Vol. 20, e03259, 07.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Using ultrafine fly ash to achieve low-carbon, high strength and high toughness engineered cementitious composites LC-HSTC
AU - Cai, Minjin
AU - Zhu, Hailiang
AU - Wan, Yang
AU - Zhu, Hehua
AU - Rabczuk, Timon
AU - Zhuang, Xiaoying
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/5/10
Y1 - 2024/5/10
N2 - 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.
AB - 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.
KW - ECC
KW - High strength
KW - High toughness
KW - Low carbon
KW - Ultrafine fly ash
UR - http://www.scopus.com/inward/record.url?scp=85194028272&partnerID=8YFLogxK
U2 - 10.1016/j.cscm.2024.e03259
DO - 10.1016/j.cscm.2024.e03259
M3 - Article
AN - SCOPUS:85194028272
VL - 20
JO - Case Studies in Construction Materials
JF - Case Studies in Construction Materials
SN - 2214-5095
M1 - e03259
ER -