TY - JOUR
T1 - Mechanical and autogenous healing properties of high-strength and ultra-ductility engineered geopolymer composites reinforced by PE-PVA hybrid fibers
AU - Nguyễn, Huy Hoàng
AU - Nguyễn, Phương Hoàng
AU - Lương, Quang Hiếu
AU - Meng, Weina
AU - Lee, Bang Yeon
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/9
Y1 - 2023/9
N2 - This study introduces high-strength and ultra-ductility engineered geopolymer composites (HSUD-EGCs). Four HSUD-EGC mixtures were designed and prepared using slag blended fly ash binders and hybridized fibers composed of polyethylene (PE) and polyvinyl alcohol (PVA). Reinforced by 1.5% PE-PVA fiber volume fraction, a mixture using a slag-to-fly ash weight ratio of 5.5:4 showed compressive strength of up to 87 MPa and tensile strain capacity of up to 10.5%, whereas a mixture using a slag-to-fly ash weight ratio of 3:6.5 achieved compressive strength of 50 MPa and tensile strain capacity of up to 12%. In addition, HSUD-EGCs showed higher cost effectiveness compared to the previous high-performance ECCs and EGCs. HSUD-EGCs had relatively limited autogenous healing potential in terms of crack sealing and stiffness recovery, but high tensile performance in the post-healing re-loading stage. Through chemical analysis, it was found the major healing material of HSUD-EGCs is C-(N)-A-S-H gel.
AB - This study introduces high-strength and ultra-ductility engineered geopolymer composites (HSUD-EGCs). Four HSUD-EGC mixtures were designed and prepared using slag blended fly ash binders and hybridized fibers composed of polyethylene (PE) and polyvinyl alcohol (PVA). Reinforced by 1.5% PE-PVA fiber volume fraction, a mixture using a slag-to-fly ash weight ratio of 5.5:4 showed compressive strength of up to 87 MPa and tensile strain capacity of up to 10.5%, whereas a mixture using a slag-to-fly ash weight ratio of 3:6.5 achieved compressive strength of 50 MPa and tensile strain capacity of up to 12%. In addition, HSUD-EGCs showed higher cost effectiveness compared to the previous high-performance ECCs and EGCs. HSUD-EGCs had relatively limited autogenous healing potential in terms of crack sealing and stiffness recovery, but high tensile performance in the post-healing re-loading stage. Through chemical analysis, it was found the major healing material of HSUD-EGCs is C-(N)-A-S-H gel.
KW - Autogenous healing
KW - Fly ash
KW - Geopolymer
KW - High-strength
KW - Slag
KW - Ultra-ductility
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U2 - 10.1016/j.cemconcomp.2023.105155
DO - 10.1016/j.cemconcomp.2023.105155
M3 - Article
AN - SCOPUS:85160803626
SN - 0958-9465
VL - 142
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
M1 - 105155
ER -