TY - JOUR
T1 - 25 years of field exposure of pre-cracked concrete beams; combined impact of spacers and cracks on reinforcement corrosion
AU - Geiker, Mette
AU - Danner, Tobias
AU - Michel, Alexander
AU - Belda Revert, Andres
AU - Linderoth, Oskar
AU - Hornbostel, Karla
PY - 2021
Y1 - 2021
N2 - The state of corrosion of three pre-cracked concrete beams was investigated after 25 years of marine exposure (atmospheric, tidal and submerged). The influence of inadequate plastic spacers was found to overrule the possible impact of bending cracks on reinforcement corrosion. Increased chloride ingress was detected in cracked areas, but very little corrosion was observed where cracks reached the reinforcement. Also, high chloride content was measured in uncracked parts of the beams, but no or very limited corrosion was observed outside spacers and a few cracks. It is hypothesised that corrosion, initiated early at weak spots (here at plastic spacers) can protect the remaining reinforcement from corrosion.
AB - The state of corrosion of three pre-cracked concrete beams was investigated after 25 years of marine exposure (atmospheric, tidal and submerged). The influence of inadequate plastic spacers was found to overrule the possible impact of bending cracks on reinforcement corrosion. Increased chloride ingress was detected in cracked areas, but very little corrosion was observed where cracks reached the reinforcement. Also, high chloride content was measured in uncracked parts of the beams, but no or very limited corrosion was observed outside spacers and a few cracks. It is hypothesised that corrosion, initiated early at weak spots (here at plastic spacers) can protect the remaining reinforcement from corrosion.
KW - Reinforced concrete
KW - Cracks
KW - Spacers
KW - Long-term marine exposure
KW - Reinforcement corrosion
U2 - 10.1016/j.conbuildmat.2021.122801
DO - 10.1016/j.conbuildmat.2021.122801
M3 - Journal article
SN - 0950-0618
VL - 286
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 122801
ER -