Experimental Studies on Composite Precast Roof Panels under Static Flexure Vasudevan N 1 PG Student 1 ,M.E Structural Engineering, Department of civil engineering, PSNA College of Engineering and Technology, Dindigul, Tamil Nadu, India. [email protected]RanjithBabu B 2 Assistant professor 2 Department of civil engineering PSNA College of engineering and technology Dindigul, Tamil Nadu, India. [email protected]Abstract - Prefabricated composite roof panels offer a variety of possibilities to be used in many locations where economy, ease of construction and speed are of prime importance. High strength to weight ratio, reduced weight and thereby attraction of lesser seismic forces and good thermal insulation are some of the important characteristics of the panels. Use of light-weight structural elements in buildings is becoming popular in the recent years. The sand is replaced with copper slag with various percentage 0,25,50,75,100.The compression, spilt tensile and rebound hammer tests were conducted for cubes and cylinder with varying percentage of copper slag. Therefore the slabs were casted with 0, 25, 50, 75&100 percentage replacement of copper slag. In this study the flexural behaviour of precast light- weight concrete panels under four-point bending is observed and the variable parameter such as replacement of copper slag has been studied Keywords - Precast, Sandwich Panels, Light-Weight Panels, Copper Slag, Expanded Polystyrene. 1.INTRODUCTION Precast concrete structural elements are manufactured under controlled factory conditions and therefore concrete structural elements with good precision in geometry and finishing can be manufactured. Background information on precast technology can be found in the literature. Precast concrete elements besides being structurally and economically efficient, also have social and environmental benefits. Precast structural elements if light-weighted also have advantages such as (i) less attraction of seismic forces, (ii) ease of handling and transportation and (iii) cost effective. Light-weight concrete sandwich panels produced by replacing core concrete using lesser dense material consist of two skins of concrete called wythe, one on either side of the core. Welded wire mesh or conventional steel rebars may be used to reinforce the wythes. The core is made of material that provides significant thermal and sound insulation. In this study, EPS (Expanded Polystyrene) is used as the core. In order to achieve composite action of the panel under flexural load shear transfer between the two wythes is ensured by using shear connectors that connect the two wythes. Experimental studies on the behaviour of light-weight concrete sandwich panels under different load conditions can be found in the literature which have proved the feasibility of using these panels for floors, roofs and walls of the buildings. Nevertheless, it is noted that in the literature no studies are found reported on the flexural behaviour of light-weight concrete sandwich panels with wires as shear connectors. In this paper the results of the experimental study carried out to determine the flexural behaviour of prototype precast light-weight concrete sandwich panels with wires as shear connectors under four- point bending are presented. Four prototype panels are tested in the present study to study the effect of percentage of reinforcement in wythes and the total thickness of the panel, both of which are directly proportional to the moment carrying capacity, ultimate load carrying capacity and the flexural behaviour of light-weight concrete sandwich panel. The paper is organized as follows. Section 2 presents the materials used and casting of the panels, Section 3 presents the experimental work test set-up details, Section 4 presents the results and discussions and Section 5 presents summary and conclusions.
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Experimental Studies on Composite Precast Roof Panels under Static · PDF file · 2017-05-22Experimental Studies on Composite Precast Roof Panels under Static Flexure ... sandwich
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