TY - JOUR
T1 - Development of engineered cementitious composites (ECC) using artificial fine aggregates
AU - Xu, Ling Yu
AU - Huang, Bo Tao
AU - Dai, Jian Guo
N1 - Funding Information:
This study was supported by the Hong Kong-Guangzhou Technology and Innovation Partnership Program (Project No. 201807010055 ) and NSFC/RGC Joint Research Scheme ( N_PolyU542/20 ). Ling-Yu Xu acknowledges the PhD studentships offered by The Hong Kong Polytechnic University. Bo-Tao Huang would like to acknowledge the support by The Hong Kong Polytechnic University through the Research Institute for Sustainable Urban Development (No.1-BBWE) and the Postdoctoral Fellowships Scheme (No. YW4K).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10/25
Y1 - 2021/10/25
N2 - In this study, Engineered/Strain-Hardening Cementitious Composites (ECC/SHCC) using artificial fine aggregates [i.e., geopolymer aggregates (GPA) and cement-bonded aggregates (CBA)] were developed for the first time. The developed GPA-ECC and CBA-ECC showed a compressive strength over 120 MPa, and the GPA-ECC recorded the highest tensile strain capacity (9.0%) among the existing ambient-cured high-strength ECC in literature. Compared with fine silica sand ECC (FSS-ECC) as a control mix, GPA-ECC and CBA-ECC showed lower compressive and tensile strength, owing to their lower aggregate strengths. From digital image correlation analysis, a more saturated multiple cracking behavior was observed for GPA-ECC as compared to CBA-ECC and FSS-ECC. In addition, the use of artificial aggregates had marginal effect on the crack width distribution of high-strength ECC. The findings in this study demonstrate the feasibility of using artificial fine aggregates in ECC production and provide a new avenue to improve ductility and sustainability for ECC materials.
AB - In this study, Engineered/Strain-Hardening Cementitious Composites (ECC/SHCC) using artificial fine aggregates [i.e., geopolymer aggregates (GPA) and cement-bonded aggregates (CBA)] were developed for the first time. The developed GPA-ECC and CBA-ECC showed a compressive strength over 120 MPa, and the GPA-ECC recorded the highest tensile strain capacity (9.0%) among the existing ambient-cured high-strength ECC in literature. Compared with fine silica sand ECC (FSS-ECC) as a control mix, GPA-ECC and CBA-ECC showed lower compressive and tensile strength, owing to their lower aggregate strengths. From digital image correlation analysis, a more saturated multiple cracking behavior was observed for GPA-ECC as compared to CBA-ECC and FSS-ECC. In addition, the use of artificial aggregates had marginal effect on the crack width distribution of high-strength ECC. The findings in this study demonstrate the feasibility of using artificial fine aggregates in ECC production and provide a new avenue to improve ductility and sustainability for ECC materials.
KW - Artificial aggregates
KW - Cement-bonded aggregate
KW - Engineered cementitious composites (ECC)
KW - Geopolymer aggregate
KW - Strain-hardening cementitious composites (SHCC)
KW - Tensile performance
UR - http://www.scopus.com/inward/record.url?scp=85114141200&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.124742
DO - 10.1016/j.conbuildmat.2021.124742
M3 - Journal article
AN - SCOPUS:85114141200
SN - 0950-0618
VL - 305
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 124742
ER -