Shakhashiro, Mohammad Jad (2026) Bond-Slip Behavior of Reinforcing Bars in Limestone Calcined Clay Cement (LC3) and Ordinary Portland Cement (OPC) Concretes: Effects of Casting Position, Member Depth, and Workability. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Text (Master Thesis)
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Abstract
Reducing the clinker content of cement is a key near-term pathway for lowering the embodied carbon of concrete. Limestone–calcined clay cement is a promising low-clinker binder, but its suitability for reinforced concrete depends on reliable steel–concrete bond performance. In particular, the bond behaviour of reinforcement in LC₃ concrete has not yet been sufficiently characterised under casting-position variability (top-cast vs bottom-cast) and member-depth effects, which are known to influence anchorage and lap-splice performance. Meanwhile, current top-bar design penalties are largely calibrated for ordinary Portland cement (OPC) concretes. This thesis quantifies and interprets the top-cast effect on bond strength and bond–slip response in LC₃ concrete relative to an OPC reference at a comparable strength class. A factorial experimental program was implemented spanning (i) binder type (OPC vs LC₃-60), (ii) concrete consistency class (EN 206 slump classes S2 and S4), and (iii) member height (160 mm, 480 mm, and 960 mm), with reinforcement arranged to represent bottom-cast and top-cast positions and to provide depth resolution within taller members. Bond behaviour was characterised at 28 days using a RILEM-based pullout protocol with Ø16 mm deformed bars and a fixed short bonded length (3.5Ø) to obtain a consistent local bond response. Primary outcomes include peak bond stress, bond–slip parameters (bond stresses at reference slips of 0.01 and 0.1 mm and slip at peak), and a castingposition reduction metric expressed as the top-cast ratio (TCR), alongside documentation of failure modes to distinguish pull-out-controlled response from splitting-type behaviour. The findings are interpreted in the context of code concepts of good versus poor bond conditions (Eurocode 2 and fib Model Code), providing design-relevant evidence on the transferability of OPC-based detailing assumptions to LC₃ concrete.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | low-carbon concrete; limestone–calcined clay cement (LC₃); steel–concrete bond; bond–slip behaviour; pull-out test |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA444 Reinforced concrete |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | Mohammad Jad Shakhashiro |
| Date Deposited: | 27 Jul 2026 07:02 |
| Last Modified: | 27 Jul 2026 07:02 |
| URI: | http://repository.its.ac.id/id/eprint/138441 |
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