Surface nanocrystallization (SNC) modification can be used to realize the high-efficiency derusting of rusted Cr-alloyed rebar and obtain nanostructured grains on surface rebar. The corrosion resistance performance SNC in a simulated Cl--containing concrete pore solution was evaluated basis electrochemical experiments. Potentiodynamic polarization testing showed that passivation current density...

Reinforced concrete (RC) has been commonly used as a construction material for decades due to its high compressive strength and moderate tensile strength. However, these two properties of RC are frequently hampered by degradation. The main degradation processes in structures carbonation the corrosion rebars. scientific community is divided regarding process which causes structural damage. Some ...

Clad rebars of four different base materials (20MnSiV, 35# steel, 45# and 55# steel) were successfully produced by a vacuum hot rolling process. A metallographic optical microscope (OM), electron backscatter diffractometer (EBSD), probe micro-analyzer (EPMA), salt spray corrosion chamber used to investigate the clad contour, properties, composite interface microstructure all rebars. The results...

In this paper, we present the development and testing of an optical-based sensor for monitoring the corrosion of reinforcement rebar. The testing was carried out using an 80% etched-cladding Fibre Bragg grating sensor to monitor the production of corrosion waste in a localized region of the rebar. Progression of corrosion can be sensed by observing the reflected wavelength shift of the FBG sens...

This paper presents current supply chain configurations for concrete reinforcement steel (rebar) in the Turkish construction industry. The supply chains were assessed by the value stream mapping method and were investigated through visits to firms involved in the supply chain and interviews with practitioners. Five different types of rebar supply chain configurations were identified in the case...

A theory is provided for piezoresistivity in carbon fiber reinforced cement (with and without embedded steel reinforcing bars) under flexure (three-point bending). The phenomenon, which involves the reversible increase of the tension surface electrical resistance and the reversible decrease of the compression surface electrical resistance upon flexure, allows strain sensing. The theory is based...

To explore the nonlinear bond behaviour between ribbed bar and concrete, combined with characteristics of concrete meso-structure surface considering frictional resistance mechanical interlocking rebar a meso-scale model is established. Based on good agreement simulation results experimental results, failure mechanism discussed, distribution stress steel are analysed. Furthermore, based meso nu...

One of the main disadvantages steel bars is rebar corrosion, especially when they are exposed to aggressive environmental conditions such as marine environments. suggested ways solve this problem use composite bars. However, these ambiguous due some weaknesses, low modulus elasticity and linear behavior in tensile tests. In research, effect hybridization process on mechanical behavior, includin...