Many studies on fiber reinforced polymer composite bars, as a substitute for reinforcing bars, have been conducted to solve corrosion of steel in reinforced concrete structures since 1960s’. However, FRP Bars have a lower elastic modulus than steel rebar as a structural component of concrete structures. Material properties with brittleness fracture and low elastic modulus can be improved by com...

The paper presents a new analytical model to study the evolution of radial cracking around a corroding steel reinforcement bar embedded in concrete. The concrete cover for the corroding rebar is modelled as a thick-walled cylinder subject to axisymmetrical displacement constraint at the internal boundary generated by expansive corrosion products. A bilinear softening curve reflecting realistic ...

While various approaches have been developed to minimize rebar cutting waste, such as optimizing patterns and the lap splice position, reducing usage by minimizing number of splices remains uninvestigated. In response these issues, a two-stage optimization algorithm was that prioritizes use special-length achieve near-zero waste (N0RCW) less than 1%, while also overall usage. The first optimize...

Cracking of the concrete cover due to corrosion is defined as the serviceability limit state of reinforced concrete structures. This study evaluated the influence of a mineral admixture i.e. nano wollastonite on corrosion performance and serviceability of reinforced concrete structures by performing an accelerated corrosion test on ten reinforced concrete beams under a sustained load. To do so,...

Received: December 28, 2017 Revised: February 23, 2018 Accepted: February 26, 2018 Abstract: Background: For centuries, steel rebar has been the primary reinforcement in concrete despite its major drawbacks, such as its heavy weight, high electrical conductivity, and corrosiveness. Thus, in response to the need for better alternatives, innovative Hybrid Composite (HC) reinforcements have been d...

Abstract The purpose of this study was to solve the chloride corrosion damage problems rebar in reinforced concrete structures under environment. effects 1.0% triethanolamine (abbreviated as TEA), Ca(NO 2 ) , and 0.5% TEA + composite inhibitor) on electrochemical performance modification mechanism mortar specimens were investigated by combining macro experiment microanalysis. results showed tha...

A 42-year-old woman was referred to our institution with sudden onset of ataxia, facial paresis, horizontal gaze palsy, and progressive dysarthria. The patient worsened within a few minutes, with appearance of left hemiparesis. The National Institutes of Health Stroke Scale Score was 13. On computer tomography scan 2 hours after stroke onset, no brain stem lesion or intracranial bleeding was vi...

The inhibition effect of Vernonia amygdalina (bitter leaf) extract on the corrosion behaviour of embedded mild steel rebar in concrete has been investigated by electrochemical potential measurement, pH and gravimetric (weight loss) methods. The results were further analysed using the two-factor ANOVA test. The experiments were performed using bitter leaf extract as a green inhibitor in 3.5% sod...

Although research has shown a considerable influence of the pre-cracking phenomenon on steel-congested concrete members, only normal (NC) been considered in literature. The intention this paper is thus to study effect bond response pre-cracked NC with different slump flow values and self-consolidating (SCC). Initial crack widths ranging from 0.0 0.5 mm are studied. Results show that initial lar...