Pullout strength behaviour of self-compacted concrete in aggressive solutions
Maha Sabhana, Adnan Al-Sibahya *
aCivil Engineering Department, College of Engineering, The University of Al-Qadisiyah, Iraq
A R T I C L E I N F O
Article history:
Received 27 December 2019
Received in revised form 00 January 2019
Accepted 00 February 2019
Keywords:
Corrosion
Epoxy coated
Pullout test
A B S T R A C T
The aim of this study was to investigation pullout strength behaviour of self-compacted concrete under corrosion conditions. Block samples, two configurations of wooden moulds were fabricated. The first has a dimensions of (375×250×250) mm (l×w×h) of the steel bar with 25mm diameter. Whilst, the second was designed with dimensions of (200×120×120) mm (l ×w ×h) for the steel bar of 12.5 mm, the total number of samples is twelve samples, six samples for each group mentioned previously. The hardened concrete samples were either cured in tap water or exposed to salt solution. A suitable epoxy was used for coating part of the formulated samples. The preliminary mechanical properties and the rate of corrosion were firstly measured, the pullout was then carried out. A comparison was also made with the relevant code of practice. The results obtained showed that both of compressive strength and density features exhibited notable increase at early ages when the samples are exposed to salt solution. The adverse effect of such curing condition appeared at the later ages when the corrosion rate became more intensive. The highest decrease in the value of pullout strength was observed for the reinforced concrete block samples containing epoxy coating reaching to 44.5% less than those cured in tap water.
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