A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bond-slip behaviour of corroded reinforcement and ultra-high toughness cementitious composite in flexural members
https://orcid.org/0000-0002-7640-711X
Highlights Both post-corroded and pre-corroded reinforcement were considered in bond tests. Bond strength was remained at corrosion ratio below 12% for post-corrosion series. The pre-corrosion series had a larger residual bond strength than post-corrosion series. Bond toughness remained not less than the initial toughness value within obtained corrosion level.
Abstract Bonding between ultra-high toughness cementitious composite (UHTCC) and corroded reinforcement has a great effect on the mechanical behaviour of reinforced UHTCC members subjected to chloride attack and of corroded structural members repaired with UHTCC. This paper presents an experimental study on bonding between UHTCC and post- and pre-corroded rebar using bending tests. The test parameters included corrosion ratio and bond length. Failure and cracking pattern, bond-slip curves, bond strength, and bond toughness were compared. The bond strength decreased with increasing bond length, and increased initially and then decreased with increasing corrosion ratio. The critical corrosion ratio, at which the bond strength became lower than the initial strength, was approximately 12–13.5% for post-corrosion specimens and 13.5–18% for pre-corrosion specimens. The residual bond strength of pre-corrosion specimens was superior to that of post-corrosion specimens. Rebar corrosion obtained at these corrosion levels had hardly any negative effect on the bond toughness index.
Bond-slip behaviour of corroded reinforcement and ultra-high toughness cementitious composite in flexural members
https://orcid.org/0000-0002-7640-711X
Highlights Both post-corroded and pre-corroded reinforcement were considered in bond tests. Bond strength was remained at corrosion ratio below 12% for post-corrosion series. The pre-corrosion series had a larger residual bond strength than post-corrosion series. Bond toughness remained not less than the initial toughness value within obtained corrosion level.
Abstract Bonding between ultra-high toughness cementitious composite (UHTCC) and corroded reinforcement has a great effect on the mechanical behaviour of reinforced UHTCC members subjected to chloride attack and of corroded structural members repaired with UHTCC. This paper presents an experimental study on bonding between UHTCC and post- and pre-corroded rebar using bending tests. The test parameters included corrosion ratio and bond length. Failure and cracking pattern, bond-slip curves, bond strength, and bond toughness were compared. The bond strength decreased with increasing bond length, and increased initially and then decreased with increasing corrosion ratio. The critical corrosion ratio, at which the bond strength became lower than the initial strength, was approximately 12–13.5% for post-corrosion specimens and 13.5–18% for pre-corrosion specimens. The residual bond strength of pre-corrosion specimens was superior to that of post-corrosion specimens. Rebar corrosion obtained at these corrosion levels had hardly any negative effect on the bond toughness index.
Bond-slip behaviour of corroded reinforcement and ultra-high toughness cementitious composite in flexural members
https://orcid.org/0000-0002-7640-711X
Highlights Both post-corroded and pre-corroded reinforcement were considered in bond tests. Bond strength was remained at corrosion ratio below 12% for post-corrosion series. The pre-corrosion series had a larger residual bond strength than post-corrosion series. Bond toughness remained not less than the initial toughness value within obtained corrosion level.
Abstract Bonding between ultra-high toughness cementitious composite (UHTCC) and corroded reinforcement has a great effect on the mechanical behaviour of reinforced UHTCC members subjected to chloride attack and of corroded structural members repaired with UHTCC. This paper presents an experimental study on bonding between UHTCC and post- and pre-corroded rebar using bending tests. The test parameters included corrosion ratio and bond length. Failure and cracking pattern, bond-slip curves, bond strength, and bond toughness were compared. The bond strength decreased with increasing bond length, and increased initially and then decreased with increasing corrosion ratio. The critical corrosion ratio, at which the bond strength became lower than the initial strength, was approximately 12–13.5% for post-corrosion specimens and 13.5–18% for pre-corrosion specimens. The residual bond strength of pre-corrosion specimens was superior to that of post-corrosion specimens. Rebar corrosion obtained at these corrosion levels had hardly any negative effect on the bond toughness index.
Bond-slip behaviour of corroded reinforcement and ultra-high toughness cementitious composite in flexural members
Hou, Lijun (author) / Guo, Shang (author) / Zhou, Bingxuan (author) / Chen, Da (author) / Aslani, Farhad (author)
Construction and Building Materials ; 196 ; 185-194
2018-11-16
10 pages
Article (Journal)
Electronic Resource
English
Bond , UHTCC , Post-corrosion , Pre-corrosion , Bond strength , Toughness
| British Library Online Contents | 2019
Bond-Slip Behavior of Corroded Rebar Embedded in Ultrahigh Toughness Cementitious Composite
| British Library Online Contents | 2018