• Sutter, S. De
• Remy, Olivier
• Remy, O.
• Wastiels, Jan
• Tysmans, Tine
• Tysmans, T.
• Sutter, Sven De

Abstract

Context: Current formwork research aims towards new cost-competitive formwork systems and <br/>materials that focus on labour reduction and efficient material use. This labour cost is reduced when <br/>using Stay-in-Place (SiP) formworks. Besides its forming function, SiP formwork can moreover have a <br/>protective, an aesthetic or even a structural contribution to the hardened concrete element. <br/>Objective: Using cement composites, the authors developed a new Stay-in-Place formwork concept for <br/>beams that is lightweight, easy to place and omits steel reinforcement. <br/>Method: This paper describes the conceptual design, the analytical modelling of the loadbearing <br/>behaviour and the bending tests that demonstrate its structural feasibility. <br/>Results: Unlike for steel-reinforced concrete beams, serviceability limit state becomes dominant for the <br/>developed hybrid beams. As experiments show, hybrid beams with equal stiffness as traditional <br/>reinforced concrete beams, have an increased load bearing capacity of 87%, while being 28% lighter. <br/>Conclusion: This paper proves the feasibility and potential of structural SiP formworks in cement composites with hollow core elements for future structural applications.

Topics

• impedance spectroscopy
• experiment
• steel
• composite
• cement
• bending flexural test
• forming