Bond behaviour between steel / stainless-steel reinforcing bars and low binder concrete (LBC)

Freitas, Emanuel; Louro, Ana S.; Costa, Hugo; Cavaco, Eduardo; Júlio, Eduardo; Pipa, M.

doi:10.1016/j.engstruct.2020.111072

Cited by 14 publications

(4 citation statements)

References 24 publications

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“…Research on reinforced concrete structures has remained consistent: Yue Liu [ 13 ] investigated the bonding properties and bond strength between ultra-lightweight concrete and high-strength concrete; Emanuel Freitas [ 14 ] studied the bonding properties between reinforcement and low bond concrete; A. Casanova [ 15 ] proposed a new finite element method for simulating the bonding effect of reinforced concrete; Yijie Huan [ 16 ] investigated the bonding performance between epoxy coated reinforcement (ECSB) and seawater sea sand recycled concrete; Xueyu Xiong [ 17 ] simulated the bonding performance of slowly bonded prestressing tendon (RBT) beam soils and compared the bonding performance of RBT beams with that of deformed steel bars. Kamrul Islam [ 18 ] studied the effect of various factors on the bond strength of reinforced concrete; M. Harajli [ 19 ] conducted a comparative analysis of bond slip characteristics of reinforcement in plain and fibrous concrete; Dorleta Ertzibengoa [ 20 ] studied the bond characteristics of carbon and stainless steel flat bars; Eliene Pires Carvalho [ 21 ] investigated the bond strength of thin reinforced concrete; and, Le Huang [ 22 ] provided a new mechanical model and simulated the nonlinear bond properties of reinforced concrete using a beam test method.…”

Section: Introductionmentioning

confidence: 99%

Basic Mechanical Properties of Duplex Stainless Steel Bars and Experimental Study of Bonding between Duplex Stainless Steel Bars and Concrete

Cui

Wang

2021

Materials

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In recent years, as a result of the large-scale use of stainless steel bars in production and life, people’s demand for stainless steel bars has increased. However, existing research information on stainless steel bars is scant, especially the lack of research on the mechanical properties of duplex stainless steel bars and the bonding properties of duplex stainless steel bars to concrete. Therefore, this paper selects 177 duplex stainless steel bars with different diameters for room temperature tensile test, and then uses mathematical methods to provide suggestions for the values of their mechanical properties. The test results show that the duplex stainless steel bar has a relatively high tensile strength of 739 MPa, no significant yield phase, and a relatively low modulus of elasticity of 1.43 × 105 MPa. In addition, 33 specimens were designed to study the bonding properties of duplex stainless steel bars to concrete. In this paper, the effects of concrete strength, duplex stainless steel reinforcement diameter, the ratio of concrete cover to reinforcing steel diameter, and relative anchorage length on the bond stress were investigated, and a regression model was established based on the experimental results. The results show that, with the concrete strength concrete strength from C25 to C40, the compressive strength of concrete increased by 56.1%, the bond stress increased by 27%; the relative anchorage length has been increased from 3 to 6, the relative anchorage length has doubled, and the bond stress has increased by 13%; and, the ratio of concrete cover to reinforcing steel diameter increased to a certain range on the bond stress has no significant effect and duplex stainless steel reinforcement diameter has little effect on the bond stress. The ratio of concrete cover to reinforcing steel diameter from 3.3 to 4.5 and the bond stress increased by 24.7%. A ratio of concrete cover to reinforcing steel diameter greater than 4.5 has no significant effect on the bond stress, with the average bond stress value of 20.1 MPa. The duplex stainless steel bar diameter has little effect on the bond stress for the diameters of 12 mm, 16 mm, 25 mm duplex stainless steel bar, and their average bond stress is 19.9 MPa.

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Section: Introductionmentioning

confidence: 99%

Basic Mechanical Properties of Duplex Stainless Steel Bars and Experimental Study of Bonding between Duplex Stainless Steel Bars and Concrete

Cui

Wang

2021

Materials

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“…Finally, Freitas et al [114] investigated the bond characteristics of SS rebars embedded in low binder concrete (LBC), to achieve more sustainable construction. In this case, the compactness of the concrete mixture was the main parameter controlling the bond development.…”

Section: Bond Behaviour Ss Embedded In Concretementioning

confidence: 99%

Structural performance of stainless steel reinforced concrete members: A review

Rabi

Shamass

Cashell

2022

Construction and Building Materials

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“…The possible addition of fibers into LCC may be an important future research topic to improve the carbon reduction and its sustainability even more. The bond strength between steel rebars and low cement concrete is significantly improved by the higher compactness of LCC [71]; thus, it is expected that similar influence might occur on bond strength between the matrix and the reinforcement fibers. However, major challenges are expected in the development of fiber reinforced LCC, since rigid steel fibers have a high influence on the aggregate packing [72] and high volumes of paste are usually necessary [73] to obtain proper rheology and workability.…”

Section: Lifetime Of Structures and Minimum Concrete Cover Regarding mentioning

confidence: 99%

Durability and Time-Dependent Properties of Low-Cement Concrete

et al. 2020

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The sustainability concerns of concrete construction are focused both on the materials’ eco-efficiency and on the structures’ durability. The present work focuses on the characterization of low cement concrete (LCC), regarding time-dependent and durability properties. LCC studies which explore the influence of the formulation parameters, such as the W/C (water/cement ratio), W/Ceq, (which represents the mass ratio between water and equivalent cement), W/B (water/binder) ratio, and the reference curves, on the aforementioned properties are limited. Thus, several LCC mixtures were formulated considering two dosages of binder powder, 350 and 250 kg/m3, the former with very plastic consistency and the latter with dry consistency, which were combined with a large spectrum of cement replacement rates (up to 70%), through adding fly ash and limestone filler, and with different compactness levels. The main objectives were to study the influence of the formulation parameters on the properties: shrinkage and creep, accelerated carbonation and water absorption, by capillarity, and by immersion. The lifetime of structures produced with the studied LCC was estimated, considering the durability performance, regarding the carbonation effect on the possible corrosion of the steel reinforcement. LCC mixtures with reduced cement dosage and high compactness, despite the high W/C ratios, have low shrinkage and those with higher strength have reduced creep, however depending on W/Ceq ratio. Those mixtures can be formulated and produced presenting good performance regarding carbonation resistance and, consequently, a long lifetime, which is mandatory for a sustainable construction. LCC with 175 kg/m3 of cement dosage is an example with higher lifetime than current concrete with 250 kg/m3 of cement; depending on the XC exposure classes (corrosion induced by carbonation), the amount of cement can be reduced between 37.5% and 42%, since the LCC with 175 kg/m3 of cement allows reducing the concrete cover below the minimum recommended, ensuring simultaneously the required lifetime for current and special structures.

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Bond behaviour between steel / stainless-steel reinforcing bars and low binder concrete (LBC)

Cited by 14 publications

References 24 publications

Basic Mechanical Properties of Duplex Stainless Steel Bars and Experimental Study of Bonding between Duplex Stainless Steel Bars and Concrete

Basic Mechanical Properties of Duplex Stainless Steel Bars and Experimental Study of Bonding between Duplex Stainless Steel Bars and Concrete

Structural performance of stainless steel reinforced concrete members: A review

Durability and Time-Dependent Properties of Low-Cement Concrete

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