workers who carry out manual rebar tying tasks are exposed to muscular-skeletal injuries associated with the use of manual tools and the movements associated with them (force, repetitiveness and awkward wrist postures). this paper presents a background on musculoskeletal injuries directly linked to manual and mechanical rebar tying method is conducted. the objective of this study is to compare ...

The transfer of forces from reinforcing bars to surrounding concrete in reinforced concrete (RC) is influenced by many parameters. Several efforts were made to understand the influence of bond on global behaviour of RC members. However, the information on bond strength of high strength concrete (HSC) is lacking. An attempt was made to study the influence of various parameters on bond such as ba...

This paper explores a set of new equations to predict the bond strength between fiber reinforced polymer (FRP) rebar and concrete. The proposed equations are based on a comprehensive statistical analysis and existing experimental results in the literature. Namely, the most effective parameters on bond behavior of FRP concrete were first identified by applying a factorial analysis on a part of t...

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,...

Considering economical reasons and attempting to reduce carbon foot print of concrete structures, there is increasing tendency toward use of high strength reinforcement in seismically active regions. ACI 318-19, Iranian steel rebars standard INSO 3132 and next edition of Iranian national building allow the use of high strength rebars in elements of ductile force resisting systems. Therefore it ...

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...