FERROCEMENT SANDWICH AND CORED PANELS
FOR FLOOR AND WALL CONSTRUCTION
29th Our World in Concrete and Structures (OWICs) - 2004
Ezzat H. Fahmy*, The American University in Cairo, Egypt
Yousry B. Shaheen, Menoufia University, Egypt
Mohamed N. Abou Zeid, The American University in Cairo, Egypt
Hassan Gaafar, The American University in Cairo, Egypt
This paper presents the results of the second phase of an on going research to develop ferrocement sandwich and hollow core panels for use as floor and wall bearing units. The proposed panels are lighter in weight relative to the conventional reinforced concrete panels. The sandwich panels consisted of two thin ferrocement layers reinforced with one or two layers of closely spaced welded wire mesh. The core of the panel was made of light weight brick. Steel wires were used to tie the steel meshes of the two skin layers together and to act as shear connectors to transfer shear between the two ferrocement skin layers . These steel wires were embedded in the mortar joints of the brick. The thickness of the ferrocement skin layer was 25mm when single layer of wire mesh was used and 35mm when two layers of mesh reinforcement were used. The core material was 70 mm thick.
For the hollow core panels, the core is made of the same mortar matrix as the skin layers with three circular holes of 75mm diameter running along the length of the specimen. Channel shapes made of expanded metal mesh, running along the length of the specimen, were embedded in the core material between the holes and at the two ends of the cross section to connect the reinforcement of the skin layers and to provide shear reinforcement. Three types of the steel mesh were used to reinforce the
ferrocement skin layers. Namely: welded wire mesh, woven mesh, and expanded metal mesh.
Experimental investigation was conducted on the proposed panels. A total of 17 sandwich panels and 24 cored panels 380mm in width, and 1.0m in height were tested under flexural and axial loading up to failure. The deformation characteristics and cracking behavior were recorded and observed for
The results showed that high ultimate and serviceability loads, crack resistance control , high ductility, and good energy absorption properties could be achieved by using the proposed panels . This could be of true construction merits for both developed and developing countries .