Bond of Reinforcement with Normal-weight Fiber Reinforced Concrete

Ali, Ahsan; Iqbal, Shahid; Holschemacher, Klaus; Bier, Thomas

doi:10.3311/ppci.8660

Cited by 1 publication

(5 citation statements)

References 9 publications

(9 reference statements)

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“…The main objective of this study was to investigate the effect of maximum aggregate size on the bond strength of reinforcements with concrete. Results for bond strength are summarized in Table III calculated using (1). Results indicate no major change in bond strength with decrease in maximum aggregate size.…”

Section: ) Bond Strengthmentioning

confidence: 99%

“…When the concrete member is loaded, tensile stresses from steel to concrete are transferred through the bond. Therefore, to ensure the safety of concrete, proper bonding between reinforcing steel and concrete is essential When the concrete member cracks, tensile stresses are resisted by the reinforcement, reinforcement slip occurs which is resisted by friction and reinforcement bearing producing bond stresses [1]. Bond behavior of steel reinforcements with concrete is an important aspect which affects the performance of reinforced concrete [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…There are three main components of bond between reinforcements and concrete: friction, chemical adhesion and mechanical interlocking of deformations in steel bars. The factors affecting bond strength include strength and cover of concrete around reinforcement, geometry and yielding strength of reinforcement, embedded length, type of aggregates and admixtures used [1,[7][8][9][10] An increase of up to 20% in pullout load is reported with increase of concrete cover depth from 40mm to 70mm [9]. Studying the effect of concrete cover on bond behavior, it is reported that the bond strength increases but the rate of increase decreases with the increase of concrete cover [10].…”

Section: Introductionmentioning

confidence: 99%

“…It is reported that, galvanization of reinforcements can improve its resistance against carbonation and can extend the life of reinforced concrete structures [13]. Investigating the effect of bar size on the bond strength of reinforcements in concrete, it is reported that bond strength of smaller bars (10mm diameter) is 21% higher than that of the larger bars (20mm) [1]. Size of aggregate may be another bond influencing factor.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, this study is conducted to investigate the effect of aggregate size on the bond behavior of reinforcements in concrete. Bond strength is calculated by dividing the maximum pullout load by the surface are of the reinforcement bar given by (1).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of Maximum Aggregate Size on the Bond Strength of Reinforcements in Concrete

Iqbal

Ullah

Ali

2018

Eng. Technol. Appl. Sci. Res.

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The bond between reinforcements and concrete is the only mechanism that transfers the tensile stresses from concrete to reinforcements. Several factors including chemical adhesion, roughness and reinforcement interface and bar bearing affect the bond strength of reinforcements with concrete. This work was carried out considering another varying factor which is maximum aggregate size. Four mixes of concrete with similar compressive strengths but different maximum aggregate sizes of 25.4mm, 19.05mm, 12.7mm and 9.53mm were used with the same bar size of 16mm. Compressive strength, splitting tensile strength and bond strength for each concrete mix were studied. Test results depict a slight increase in compressive and splitting tensile strength with decrease in maximum aggregate size. The bond strength remained at the same level with decrease in maximum aggregate size except at maximum aggregate size of 9.53mm when there was a drop in bond strength, despite better compressive and splitting tensile strengths. ACI-318 and FIB-2010 codes equation for bond strength calculation work well only when the maximum aggregate size is 12.7mm and above. Therefore, maximum aggregate size is critical for bond strength when smaller size aggregates are used.

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Section: ) Bond Strengthmentioning

confidence: 99%