Development of impact resistant high-strength strain-hardening cementitious composites (HS-SHCC) superior to reactive powder concrete (RPC) under flexure

Min Jae Kim; Hong Joon Choi; Wonsik Shin; Taekgeun Oh; Doo Yeol Yoo

doi:10.1016/j.jobe.2021.102652

Development of impact resistant high-strength strain-hardening cementitious composites (HS-SHCC) superior to reactive powder concrete (RPC) under flexure

Min Jae Kim, Hong Joon Choi, Wonsik Shin, Taekgeun Oh, Doo Yeol Yoo

Department of Architecture and Architectural Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The drop-weight impact behavior of the ductility enhanced high-strength strain-hardening cementitious composites (dHS-SHCC) is compared to that of conventional reactive powder concrete (RPC) to validate its super-impact resistance. All materials have an identical fiber volume fraction of 2%. The compressive strengths of RPC and dHS-SHCC are approximately 210 and 115 MPa, respectively. RPC has the highest ultimate tensile strength of 17.9 MPa, while the developed dHS-SHCC has the highest tensile strain capacity and energy absorption capacity up to the peak (g-value) of 5.9% and 526.0 kJ/m³, respectively. It also absorbs 3.2 times higher energy up to the peak under flexure (toughness) as compared to that of RPC. The RPC beams completely fail upon impact of a drop hammer with a potential energy of 490 J. However, the dHS-SHCC beams are only partially damaged along with multiple microcrack formations and rebounds. Moreover, it produces at least four times the microcracks and is more sensitive to the strain-rate than those of RPC. Consequently, it can be determined that using developed dHS-SHCC is effective in resisting impact loads as compared to RPC.

Original language	English
Article number	102652
Journal	Journal of Building Engineering
Volume	44
DOIs	https://doi.org/10.1016/j.jobe.2021.102652
Publication status	Published - 2021 Dec

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea ( NRF ) grant funded by the Korea government ( MSIT ) (No. 2021R1A2C4001503 ).

Publisher Copyright:
© 2021 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Architecture
Building and Construction
Safety, Risk, Reliability and Quality
Mechanics of Materials

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10.1016/j.jobe.2021.102652

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title = "Development of impact resistant high-strength strain-hardening cementitious composites (HS-SHCC) superior to reactive powder concrete (RPC) under flexure",

abstract = "The drop-weight impact behavior of the ductility enhanced high-strength strain-hardening cementitious composites (dHS-SHCC) is compared to that of conventional reactive powder concrete (RPC) to validate its super-impact resistance. All materials have an identical fiber volume fraction of 2%. The compressive strengths of RPC and dHS-SHCC are approximately 210 and 115 MPa, respectively. RPC has the highest ultimate tensile strength of 17.9 MPa, while the developed dHS-SHCC has the highest tensile strain capacity and energy absorption capacity up to the peak (g-value) of 5.9% and 526.0 kJ/m3, respectively. It also absorbs 3.2 times higher energy up to the peak under flexure (toughness) as compared to that of RPC. The RPC beams completely fail upon impact of a drop hammer with a potential energy of 490 J. However, the dHS-SHCC beams are only partially damaged along with multiple microcrack formations and rebounds. Moreover, it produces at least four times the microcracks and is more sensitive to the strain-rate than those of RPC. Consequently, it can be determined that using developed dHS-SHCC is effective in resisting impact loads as compared to RPC.",

author = "Kim, {Min Jae} and Choi, {Hong Joon} and Wonsik Shin and Taekgeun Oh and Yoo, {Doo Yeol}",

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AU - Oh, Taekgeun

AU - Yoo, Doo Yeol

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Development of impact resistant high-strength strain-hardening cementitious composites (HS-SHCC) superior to reactive powder concrete (RPC) under flexure

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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