Influence of various design parameters of the grouted duct on mono-strand bond behavior in post tensioned members

Kobrosli, Houssam; Baalbaki, Oussama; Jahami, Ali; Saleh, Zaher Abou; Khatib, Jamal; Kırgız, Mehmet Serkan; Galdino, André Gustavo de Sousa

doi:10.1016/j.jmrt.2022.01.034

Cited by 5 publications

(1 citation statement)

References 23 publications

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“…The angles were affixed to the layers with the of Sika AnchorFix-1 and a satisfactory performance was obtained. Kobrosli et al [11] investigated factors that could affect the bond between concrete-strand and concrete-duct in reinforced concrete (RC) slabs and beams while the considered grout was Sika AnchorFix. Obaidi et al [12] also performed flexural strengthening of RC beams by using near surface mounted fiberreinforced polymer bars and the bars were attached to concrete by using Sika AnchorFix-1.…”

Section: Introductionmentioning

confidence: 99%

Bond Strength of Steel Bars in Sustainable Concrete Made with Recycled Aggregates

Saingam,

Min,

Ejaz

et al. 2023

KEM

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Lately, considerable efforts have been directed towards investigating the practicality of using coarse recycled concrete aggregate as a potential substitute for natural coarse aggregate (NCA) in concrete construction. Research has shown that both the proportion of replacement and the properties of recycled aggregates play a significant role in affecting the tensile strength, compressive strength, and bonding characteristics of concrete. In certain cases, recycled aggregate concrete exhibits lesser mechanical properties when compared to concrete made with normal aggregates. The current study investigated the performance of Sika AnchorFix-1 to enhance the bond strength between steel bars and recycled aggregate concrete. The findings suggest that Sika AnchorFix-1 successfully prevented the concrete rupture in the case of concrete with recycled concrete aggregates, whereas concrete rupture could not be prevented in the case of concrete with recycled brick aggregates. Hence, a lower bond strength was obtained for specimens with recycled bricks aggregates than specimens with recycled concrete aggregates.

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Section: Introductionmentioning

confidence: 99%

Bond Strength of Steel Bars in Sustainable Concrete Made with Recycled Aggregates

Saingam,

Min,

Ejaz

et al. 2023

KEM

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Bond of post-tensioning strands in case of grouting defects

Ferretti,

Pagliari,

Belletti

2024

Construction and Building Materials

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Development Length Assessment of Bonded Post-Tensioning Slabs with Bulb-Shaped Dead end Anchorage

Aly,

Maree,

Kohail

et al. 2024

Int J Concr Struct Mater

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The bond between prestressing strands and concrete within the dead-end zone of a post-tensioned concrete member significantly influences the effectiveness of the strand-concrete system. However, the existing code equations for determining development length rely on studies conducted on pretensioned concrete members rather than post-tensioned ones. As a result, the implementation of development length for prestressing strands with bulb-shaped dead end anchorage in post-tensioning slabs relies on common practice and former experience. Unfortunately, this can sometimes lead to concrete cracks or strand slippage at the dead end zone due to insufficient development length. This paper presents an experimental study on post-tensioning slab segments representing the dead end zone. The aim of this study is to assess the development length of prestressing strands with bulb-shaped dead end that shall guarantee full bond with concrete throughout the member’s service life. The Specimens were divided according to three different concrete compressive strengths 34 MPa, 48 MPa and 70 MPa. The parameters considered included slab thicknesses of 160 mm and 250 mm, as well as strand embedment lengths of 700 mm and 850 mm. Based on the test results, the sufficient development length was determined. Furthermore, a verification was carried out to assess the validity of applying predicted equations from an adopted bond model to determine the bond strength of strand with bulb-shaped dead end anchorage in concrete slabs.

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Influence of various design parameters of the grouted duct on mono-strand bond behavior in post tensioned members

Cited by 5 publications

References 23 publications

Bond Strength of Steel Bars in Sustainable Concrete Made with Recycled Aggregates

Bond Strength of Steel Bars in Sustainable Concrete Made with Recycled Aggregates

Bond of post-tensioning strands in case of grouting defects

Development Length Assessment of Bonded Post-Tensioning Slabs with Bulb-Shaped Dead end Anchorage

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