PSI - Issue 64

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 1573–1580

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Bond behavior of magnesium potassium phosphate cement (MKPC) coating for steel reinforcement in conventional concrete and related repair materials Eric Williams a , Sadeq Annooz a , and John J. Myers a * a Missouri S&T, 1401 N Pine St, 325 Butler Carlton Hall, Rolla, MO 65409, United States of America Abstract This research investigates the bond behavior of magnesium potassium phosphate cement (MKPC) coated mild steel bars in conventional concrete, focusing on its relation to both epoxy coated and mild steel bar bond behavior related to the magnitude of variation. In traditional concrete a passive layer protects the mild reinforcing steel from corrosion until the concrete becomes carbonated and then mild steel will start to corrode with access to moisture and oxygen. To combat this, it is common to incorporate an additional layer of protection to the reinforcing steel, such as an epoxy coating or galvanizing the steel with zinc. A novel coating that has been developed to resist corrosion is magnesium potassium phosphate cement (MKPC). MKPC demonstrates potential as an anti-corrosion coating for new construction and repair due to its rapid hardening, early strength, and good bond qualities based upon prior work conducted at Missouri S&T [Zhang et al. (2023)] The aim of this paper is to investigate those bond qualities. Ultimately, the results aim to inform engineering practices and improve the understanding on the bond behavior of MKPC anti-corrosion coated mild steel bars, how it compares to mild steel and epoxy coated steel in conventional concrete for infrastructure development, thereby addressing a critical need in the field. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Anti-corrosion steel coating materials; magnesium potassium phosphate cement (MKPC); epoxy coated steel; bond behavior of mild steel; rebar pull-out capacity. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

* Corresponding author. Tel.: +1-573-341-6618; fax: +0-000-000-0000 . E-mail address: jmyers@mst.edu

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 10.1016/j.prostr.2024.09.411