TY - JOUR
T1 - Bio-inspired self-prestressing concrete (SPC) involving basalt fibers and expansive agent
AU - Chu, S. H.
AU - Khan, M
AU - Deng, X
AU - Unluer, C
N1 - Funding Information:
The authors would like to express thanks to Prof. A.K.H. Kwan for the great inspiration and Department of Civil Engineering at The University of Hong Kong for offering necessary assistance and support.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/5
Y1 - 2022/5
N2 - Inspired by muscle structure, the synergy between basalt fibers (BF) and expansive agent (EA) was revealed and utilized for the development of self-prestressing concrete (SPC). When BF and EA were used together, the restraining action of BF against the autogenous expansion of concrete yielded active confining stress, during which fibers were prestressed, producing SPC. The properties of SPC were investigated by varying BF (0–0.6%) and EA (0–3%) contents. The addition of EA and/or BF decreased workability but improved mechanical performance. The strength-workability envelopes revealed the superiority of the combined use of EA and BF, whose synergistic effect was analysed both qualitatively and quantitatively. Possible mechanisms behind their contribution to sample performance were discussed considering passive and active confinements. Scanning electron microscopy images revealed improvement in the fiber-matrix interface with an increase in the amount of EA. This bio-inspired work shall be beneficial to the development of SPC with improved performance.
AB - Inspired by muscle structure, the synergy between basalt fibers (BF) and expansive agent (EA) was revealed and utilized for the development of self-prestressing concrete (SPC). When BF and EA were used together, the restraining action of BF against the autogenous expansion of concrete yielded active confining stress, during which fibers were prestressed, producing SPC. The properties of SPC were investigated by varying BF (0–0.6%) and EA (0–3%) contents. The addition of EA and/or BF decreased workability but improved mechanical performance. The strength-workability envelopes revealed the superiority of the combined use of EA and BF, whose synergistic effect was analysed both qualitatively and quantitatively. Possible mechanisms behind their contribution to sample performance were discussed considering passive and active confinements. Scanning electron microscopy images revealed improvement in the fiber-matrix interface with an increase in the amount of EA. This bio-inspired work shall be beneficial to the development of SPC with improved performance.
KW - Composite (E)
KW - Compressive strength (C)
KW - Expansion (C)
KW - fiber reinforcement (E)
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85124585012&partnerID=MN8TOARS
UR - https://www.mendeley.com/catalogue/92242258-c66f-3f88-8414-eff8359deca1/
U2 - 10.1016/j.cemconres.2022.106735
DO - 10.1016/j.cemconres.2022.106735
M3 - Article
SN - 0008-8846
VL - 155
SP - 1
EP - 12
JO - Cement and Concrete Research
JF - Cement and Concrete Research
M1 - 106735
ER -