TY - GEN
T1 - Utilization of Artificial Geopolymer Aggregates in High-Strength Engineered Cementitious Composites (HS-ECC)
AU - Xu, Ling-Yu
AU - Huang, Bo-Tao
AU - Dai, Jian-Guo
PY - 2023
Y1 - 2023
N2 - In this study, high-strength high-ductility Engineered/Strain-Hardening Cementitious Composites (ECC/SHCC) were developed with the combined use of ultra-high-strength cementitious matrix, artificial geopolymer aggregates (GPA), and ultra-high-molecular-weight (UHMW) polyethylene (PE) fibers. Apart from short-term characteristics, the long-term mechanical properties of GPA-ECC were evaluated by an accelerated aging test. It was found that GPA could behave as “additional flaws” in the high-strength matrix, leading to a better strain-hardening ability of ECC. Compared with fine silica sand ECC (FSS-ECC) whose strength indices increased but both tensile ductility and crack resistance decreased after accelerated aging, GPA-ECC showed improved long-term performances in all aspects. Furthermore, the multiple cracks were found to propagate through GPA in GPA-ECC, and the microhardness analysis revealed that the hardness growth of GPA was slower than that of cementitious matrix during the accelerated ageing test, ensuring the role of GPA as “additional flaws” in improving the long-term performance of the ECC material. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.
AB - In this study, high-strength high-ductility Engineered/Strain-Hardening Cementitious Composites (ECC/SHCC) were developed with the combined use of ultra-high-strength cementitious matrix, artificial geopolymer aggregates (GPA), and ultra-high-molecular-weight (UHMW) polyethylene (PE) fibers. Apart from short-term characteristics, the long-term mechanical properties of GPA-ECC were evaluated by an accelerated aging test. It was found that GPA could behave as “additional flaws” in the high-strength matrix, leading to a better strain-hardening ability of ECC. Compared with fine silica sand ECC (FSS-ECC) whose strength indices increased but both tensile ductility and crack resistance decreased after accelerated aging, GPA-ECC showed improved long-term performances in all aspects. Furthermore, the multiple cracks were found to propagate through GPA in GPA-ECC, and the microhardness analysis revealed that the hardness growth of GPA was slower than that of cementitious matrix during the accelerated ageing test, ensuring the role of GPA as “additional flaws” in improving the long-term performance of the ECC material. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.
KW - Ductility
KW - Engineered Cementitious Composites (ECC)
KW - Flaw effect
KW - Geopolymer aggregates (GPA)
KW - Strain-Hardening Cementitious Composites (SHCC)
UR - https://www.scopus.com/pages/publications/85153086320
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85153086320&origin=recordpage
U2 - 10.1007/978-3-031-15805-6_3
DO - 10.1007/978-3-031-15805-6_3
M3 - RGC 32 - Refereed conference paper (with host publication)
AN - SCOPUS:85153086320
SN - 978-3-031-15804-9
T3 - RILEM Bookseries
SP - 23
EP - 33
BT - Strain Hardening Cementitious Composites
A2 - Kunieda, Minoru
A2 - Kanakubo, Toshiyuki
A2 - Kanda, Tetsushi
A2 - Kobayashi, Koichi
PB - Springer
CY - Cham
T2 - 5th International RILEM Workshop on Strain Hardening Cementitious Composites (SHCC5)
Y2 - 11 September 2022 through 13 September 2022
ER -