Bond Behaviors Between Full-Recycled-Aggregate Concrete and Deformed Steel-Bar

Li, Changyong; Zhao, Minglei; Ren, Fangchun; Liang, Na; Li, Jie; Zhao, Mingshuang

doi:10.2174/1874149501711010685

Cited by 13 publications

(18 citation statements)

References 33 publications

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“…The bond behaviour of deformed rebar in high-performance SFRLAC was experimented by using the modified central pull-out test method [30][31][32]. The deformed rebar was steel bar with crescent-ribs.…”

Section: Preparation Of Specimensmentioning

confidence: 99%

“…The specimens were prepared and cured in the lab. Steel moulds with holes at central of opposite plates ensured the placement of rebar [32]. The SFRLAC was put into the moulds and vibrated on the vibration platform.…”

Section: Tab 7 -List Of Specimensmentioning

confidence: 99%

“…Figure 3 shows that with the increasing volume fraction of steel fiber, the mean values of peak-slip (su) were almost equal, however the slip at loading-end increased and the slip at free-end became smaller, which resulted in the increased deviation of slips at loading-end and free-end. This illustrates that the steel fibres in SFRLAC restrained the internal splitting of SFRLAC along rebar and led to the continuously increment of bond stress from loading-end to free-end [31,32], resulted in the enhancement of the sustainability of bond between deformed rebar and SFRLAC.…”

Section: Fig 1 -Bond Stress-slip Curves Of Specimens With Different mentioning

confidence: 99%

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Bond Performance of Deformed Rebar in Steel Fiber Reinforced Lightweight-Aggregate Concrete Affected by Multi-Factors

Zhao

Zhang

Yang

et al. 2018

CEJ

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For the innovation of building materials, a new high-performance Steel Fiber Reinforced Lightweight-Aggregate Concrete (SFRLAC) made of 100% fine and coarse expanded shales has been developed. In view of the importance of reliable bond properties between deformed rebar and this new SFRLAC, the experimental study of 39 specimens was conducted by using the modified pull-out test method with the evaluation of different slips at loading-end and free-end. In which the influencing factors were considered as the volume fraction of steel fiber, the water-cement ratio, the rebar diameter, the bond length of rebar, the strength of coarse expanded shales and the fine expanded shale replaced by manufactured sand. The complete bond stress-slip curves were measured, the bond failure modes of specimens were observed. Based on the bond mechanism of adhesion, friction and bearing action of deformed rebar in SFRLAC, the bond performance characterized by the bond strength and peak-slip, the differential of bond slip between loading-end and free-end, the bond sustainability in descending portion and the bond failure mode observed are analyzed. The recommendations are proposed for the design of SFRLAC structures related to the bond performance.

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Section: Preparation Of Specimensmentioning

confidence: 99%

Section: Tab 7 -List Of Specimensmentioning

confidence: 99%

Section: Fig 1 -Bond Stress-slip Curves Of Specimens With Different mentioning

confidence: 99%

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Bond Performance of Deformed Rebar in Steel Fiber Reinforced Lightweight-Aggregate Concrete Affected by Multi-Factors

Zhao

Zhang

Yang

et al. 2018

CEJ

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“…However, in respect to getting rid of the old cement mortar from the coarse aggregate, a simple and feasible method is to produce coarse RCA with a maximum particle size smaller than that used in the old concrete [1,2,3,4,18,19,20,21]. To meet the requirement of particle gradation of coarse aggregate, the large-particle natural aggregate and the small-particle recycled aggregate were mixed together to be the composite coarse aggregate [22,23,24]. To further enhance the tensile strength of the composite coarse aggregate, steel fibers can be admixed as the reinforcements [25,26].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Columns of Steel Fiber Reinforced Concrete with Recycled Aggregates under Large Eccentric Compression Load

Geng

Deng

et al. 2019

Materials

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To improve the structural application of steel fiber-reinforced concrete with recycled aggregates (SFRC-RA) composited in gradation by large-particle natural coarse aggregate and small-particle recycled coarse aggregate, the large eccentric compression behavior of eight SFRC-RA columns was experimentally investigated in this paper. The main parameters considered were the strength of the SFRC-RA and the volume fraction of the steel fiber. Details about the sectional concrete strain, the longitudinal steel bar strain, the lateral displacement, the cracking load, the crack distribution and crack width, and the ultimate load of the SFRC-RA columns were measured. The beneficial effects of steel fiber on these attributes were discussed, and the ductility corresponding to the lateral displacement of the SFRC-RA columns was also analyzed. Based on the test results and design principles, formulas were proposed for predicting the cracking resistance, crack width, and lateral displacement of SFRC-RA columns in a normal service state. The ultimate loads of the SFRC-RA columns under a large eccentric compression load were calculated, considering the second-order effects.

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“…The recycled coarse aggregate that produced from the construction repair and demolition was also included in some recent contributions [9][10][11] while some of these contributions were extended to produce high strength levels of recycled coarse aggregate concrete [13]. Additionally, the resource preservation and environmental concerns of this type of concrete ware also discussed in some details [14]. Accordingly, some other susceptible issues like the influence of age and successive recycling were taken into account [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Using Recycled Coarse Aggregate to the Bond Stress in Term of Beam Splice Specimens

Mohammed

Abbas

2019

Civ Eng J

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In fact, demolition west disposal represents a serious problem in the civil engineering work since such materials are accumulated in large quantities. In this way, using these materials in new construction is considered a good sustainable and cost effective solution. The basic objective of this study is to investigate the behavior of lap splice when recycled coarse aggregate is used in structural members by experimental program. This program comprises casting 12 beam splice specimens. Two mix designs are proposed with nominal compressive strength of 20 and 30 MPa, more precisely, the degrees of coarse recycled aggregate partial replacement ratio that taken throughout this study are 0, 50 and 100% respectively using a crushed concrete casted with the same original mixes defined. Since a considerable lack of information was observed about the role of recycled coarse aggregate when the bond stress is taken into account, the beam splice specimens during this study were devoted to investigate lap splice bond strength in both singly and doubly beams to discover the desired behavior in tension and compression. The results showed that the degree of recycled coarse aggregate decreases the consequent bond stress in term of beam splice specimens for singly and doubly beams. The brittle failure behavior is evident in the entire beam specimens that conducted throughout this study.

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Bond Behaviors Between Full-Recycled-Aggregate Concrete and Deformed Steel-Bar

Cited by 13 publications

References 33 publications

Bond Performance of Deformed Rebar in Steel Fiber Reinforced Lightweight-Aggregate Concrete Affected by Multi-Factors

Bond Performance of Deformed Rebar in Steel Fiber Reinforced Lightweight-Aggregate Concrete Affected by Multi-Factors

Experimental Investigation on Columns of Steel Fiber Reinforced Concrete with Recycled Aggregates under Large Eccentric Compression Load

Effect of Using Recycled Coarse Aggregate to the Bond Stress in Term of Beam Splice Specimens

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