Mechanical Performance of Amorphous Metallic Fiber-Reinforced and Rubberized Thin Bonded Cement-Based Overlays

Ayesha Javed, Syed Asad Ali Gillani, Wasim Abbass, Muhammad Rizwan Riaz, Rashid Hameed, Safeer Abbas, Abdelatif Salmi and Ahmed Farouk Deifalla
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Ayesha Javed: Civil Engineering Department, University of Engineering and Technology, Lahore 54890, Pakistan
Syed Asad Ali Gillani: Civil Engineering Department, University of Engineering and Technology, Lahore 54890, Pakistan
Wasim Abbass: Civil Engineering Department, University of Engineering and Technology, Lahore 54890, Pakistan
Muhammad Rizwan Riaz: Civil Engineering Department, University of Engineering and Technology, Lahore 54890, Pakistan
Rashid Hameed: Civil Engineering Department, University of Engineering and Technology, Lahore 54890, Pakistan
Safeer Abbas: Civil Engineering Department, University of Engineering and Technology, Lahore 54890, Pakistan
Abdelatif Salmi: Department of Civil Engineering, College of Engineering, Prince Sattam bin Abdulaziz University, Al-Kharj 16273, Saudi Arabia
Ahmed Farouk Deifalla: Department of Structural Engineering and Construction Management, Faculty of Engineering, Future University in Egypt, New Cairo 11745, Egypt

Sustainability, 2022, vol. 14, issue 13, 1-22

Abstract: To improve the flexural behavior of thin bonded cement-based overlays, this study was carried out on the use of repair material incorporating amorphous metallic fibers (AMFs) in combination with the rubber aggregates obtained from grinding of worn-out tires. For this study, sixteen mortar mix compositions were prepared to contain AMFs and/or rubber aggregates to be used as overlay material while the substrate used was plain cement mortar. Rubber aggregates were incorporated at three different replacement ratios (i.e., 10%, 20% and 30%) by an equivalent volume of sand, and AMFs were added in three different dosages (i.e., 10 kg/m 3 , 20 kg/m 3 and 30 kg/m 3 ). In this study, composite beams (500 × 100 × 140 mm) comprising substrate (500 × 100 × 100 mm) and repair layer (500 × 100 × 40 mm) were prepared and investigated under flexural loading. Experimental results showed that the increase in rubber content resulted in a decrease compressive strength, flexural strength and modulus of elasticity. Rubberized fiber-reinforced cementitious composites (30R30F) exhibited higher flexural toughness and the flexural toughness improved up to 400%. Toughness and maximum deflection of composite beams enhanced significantly due to synergetic effect of AMF and rubber aggregates. It was observed that before peak load, rubber plays its role by delaying the micro-crack propagation. Results also revealed that the steel fibers reinforcement plays an important role in restraining the crack openings under flexure loading. In the post-peak region, steel fibers control the cracks from propagating further by bridging action and provide higher post-peak residual strength.

Keywords: fiber-reinforcement; rubber aggregates; thin bonded overlay; crack opening; deflection; flexural toughness (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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