Bond strength of post-installed high strength deformed rebar in concrete

Ahmed, Khondaker Sakil; Shahjalal, Md.; Siddique, Tanvir Ahmed; Keng, Ang Kok

doi:10.1016/j.cscm.2021.e00581

Cited by 20 publications

(13 citation statements)

References 23 publications

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“…Each cement bag was kept in an air-tight plastic bag to prevent unwanted hydration with the moisture which is normally prominent in local weather conditions. (Ahmed et al, 2021b), stainless steels (Ahmed et al, 2021a;Islam et al, 2020) and also applicable for retrofitting and strengthening of existing structures such as column jacketing (Mahmud & Ahmed, 2020). Locally obtained fine and coarse aggregates which conform to the ASTM standards were used for the preparation of cement mortar and concrete.…”

Section: Experimental Investigationsmentioning

confidence: 99%

Physical and Strength Properties of Cements Manufactured in Bangladesh: A Case Study

Asef¹,

Ahmed²,

Ahmed³

2022

MIJST

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This study investigates the physical qualities and strength properties of representative cements manufactured by different brands in Bangladesh. The physical and strength properties such as normal consistency, initial and final setting time, density, specific gravity, fineness, and compressive strength of cement mortars as well as concrete cylinders were investigated experimentally. Using CEM II/B-M type cement, a total of 300 test specimens are prepared to determine those parameters. In this case study, specimens were prepared from ten different representative cement industries of Bangladesh and tested as per ASTM specifications. The experimental result shows that the physical and strength parameters of nearly all the representative cement samples are within the ASTM recommended ranges that ultimately proofs the quality of Bangladeshi Cement. The relationship between mortar and concrete strengths from the same batch of cement has also been investigated. Besides, a regression analysis has been conducted to find relationships between the concrete strength and their age of curing. The influence of initial and final setting times on concrete strength is also investigated. This study also provides the relationships between compressive strengths, between mortar and concrete cylinders at different ages. These age dependencies of concrete strength will help to predict the actual concrete strength at the early age of curing which may ensure faster construction work.

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Section: Experimental Investigationsmentioning

confidence: 99%

Physical and Strength Properties of Cements Manufactured in Bangladesh: A Case Study

Asef¹,

Ahmed²,

Ahmed³

2022

MIJST

Self Cite

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“…However, it was shown that the bond strength of straight post-installed rebars can be lower than bent cast-in-place rebars with standard hooks [7]. Ahmed et al [8] evaluated the bond behavior of post-installed highstrength steel rebars with concrete and reported that epoxy resins are effective bonding agents. Recently, a new beam-end specimen has been proposed in [9] to evaluate the bond behavior of post-installed rebar.…”

Section: Post-installed Reinforcement Systemsmentioning

confidence: 99%

“…In another study [8], the steel rebars were post-installed into concrete cylinders with epoxy resin-based grouted adhesive to evaluate their bond behavior. The results showed that the pull-out load capacity for ø12 steel rebars kept on increasing as the bond length increased from 6d b to 8d b to 10.5d b to 12.5d b .…”

Section: Effect Of Bond Lengthmentioning

confidence: 99%

Anchorage behavior of Fe-SMA rebars Post-Installed into concrete

Raza

Michels²,

Schranz³

et al. 2022

Engineering Structures

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“…Recently, hybrid reinforcement like stainless steel is found to be more effective in concrete bridge pier than that of the conventional steel (Farzana and Ahmed, 2020, Farzana and Ahmed, 2022, Ahmed et al, 2021a. In addition, post-earthquake retrofitting techniques for such concrete structures using grout jacket (Kennedy-Kuiper et al, 2022), concrete jacket (Mahmud and Ahmed, 2020) and post installed rebar (Ahmed et al, 2021b) have already been studied and found to be effective.…”

Section: Introductionmentioning

confidence: 99%

Force based Design Approach for Seismic Evaluation of Padma Multipurpose Bridge Pier at Different Performance Levels

Ahmed¹,

Moniruzzaman²,

Hossain

et al. 2022

MIJST

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The Padma Multipurpose Bridge (PMB) is one of the biggest megaprojects of Bangladesh connecting one third of the country with the capital city, Dhaka. The infrastructure is expected to produce considerable uplift on the nation’s transport system, the national and regional economy, employment, household income, and ultimately, poverty reduction. From construction and river management points of view, it is the most difficult and engineering innovation-intenstive project in the world. Hence the Padma Multipurpose Bridge (PMB) required analytical, computational and experimental studies. In this work, a 3D Finite Element (FE) model of the actual PMB containing a single (6x150m) 900m modules has been developed in MIDAS Civil, a commercial computer program for bridges. P-y soil spring model following API guideline has been developed to conform flexible support system of the bridge pier. Following BNBC 2020, the bridge's performance has been evaluated for the 475-year, 975 years, and 2475-year return periods for Service Level, Design Basis and the Maximum Credible Earthquake (MCE), respectively. The forced based design shows that the bridge pier reached only 28% and 36% of its axial and shear capacity respectively for an earthquake return period of 2475 years. On the other hand, the pier has reached a maximum of 41% of its total shear capacity for the same seismic level.

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Bond strength of post-installed high strength deformed rebar in concrete

Cited by 20 publications

References 23 publications

Physical and Strength Properties of Cements Manufactured in Bangladesh: A Case Study

Physical and Strength Properties of Cements Manufactured in Bangladesh: A Case Study

Anchorage behavior of Fe-SMA rebars Post-Installed into concrete

Force based Design Approach for Seismic Evaluation of Padma Multipurpose Bridge Pier at Different Performance Levels

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