Structural behavior of recycled tire crumb rubber sandwich panel in flexural bending

Abstract

This study presents the first phase of research, in which recycled tire crumb rubber is used as core in precast concrete sandwich panels. The proposed sandwich panel offers sustainable reuse of waste tires and improved structural efficiency by utilization of natural properties of rubber like high flexibility, thermal and sound insulation. Three types of panels namely solid concrete panel, foam (polystyrene) sandwich panel, and recycled tire crumb rubber sandwich panel are prepared and cast using 50 MPa self‐compacting concrete. A core thickness of 20 mm is provided as insulation in sandwich panels. A total of six specimens having 1100 mm length, 500 mm width, and 100 mm thickness are tested in flexural bending under four‐point loading. The structural performance of crumb rubber sandwich panel is compared against foam panel and solid concrete panel in terms of initial crack load, vertical deflection, critical peak load, strain distribution on concrete surface and in reinforcement, crack pattern, degree of composite action, and deformed shape. Moreover, initial stiffness method at elastic stage and the ultimate strength method at failure is implemented to gauge the percentage of composite behavior in sandwich panels. Both approaches predicted partial composite behavior in all specimens of sandwich panel. The research analysis demonstrated encouraging results in terms of flexural behavior for crumb rubber sandwich panel and feasibility of using it as a structural member in construction industry. The numerical analysis was performed in commercially available software “ABAQUS” in standard/explicit model using in‐built concrete damage plasticity model (CDP). The proposed model is developed as a potential tool for future studies on crumb rubber sandwich panels. The validation phase predicted a good agreement between experimentation and numerical results.

Compressive behavior of precast concrete sandwich panels containing recycled tyre crumb rubber core

“…To ensure the consistency of SCC, various lab tests like slump flow test, T 500 , V-funnel test, J-ring, and U-box test were performed at the time of pouring fresh concrete. In addition, concrete cylinder F I G U R E 2 Geometric details of precast sandwich panels (all dimensions are in mm) F I G U R E 3 Recycle tyre crumb rubber sheet 40 specimens of 200 mm  100 mm were taken for material testing. The panels were left for air drying and were later covered in wet jute fabric for curing.…”

“…Ultimate tensile strength of four specimen of recycle tyre crumb rubber 40 displacement, LVDT with a maximum stroke length of 100 mm was used. Whereas for evaluation of strain, electrical strain gauges of 60 mm long with a gauge factor of 118.5 ± 0.5 and resistance of 120 Ω were used.…”

“…Consistency tests for self-compacting concrete and results40 Material properties of self-compacting concrete40 …”

Novel cement-based sandwich composites engineered with ground waste tire rubber: design, production, and preliminary results

“…The incorporation of 0.5 v/v% steel fibers was efficient to mitigate the detrimental effect of waste expanded polystyrene concrete on the bond properties, leading to higher bearing capacity, ductility, and energy absorption prior to failure. Finally, some research works investigated sandwich panels with cementitious face sheets, using non-structural and thermoacoustically efficient fillers for the core part, including phase change materials [22], polymeric foams [23], or waste insulation filling materials [24]. In the latter respect, it is worth mentioning the research conducted by Awan and Shaikh [24], which adopted an innovative idea of using GWTR as an insulation material for PCSPs.…”

Experimental investigations of foamed concrete with recycled waste glass powder wall panels

“…The wall panels containing crumb rubber resisted 7% lower axial loads compared to solid concrete wall panels. Awan and Shaikh 25 investigated the flexural behavior of solid concrete wall panels, wall panels containing recycled tyre crumb rubber and wall panels containing EPS foam. The experimental results exhibited that wall panels with recycled tyre crumb rubber exhibited initial crack load, vertical deflection and degree of composite action similar to that of solid concrete wall panels.…”