Analysis Design and Cost Effectiveness of Precast Beam-Slab System
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Date
2009-07
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Addis Ababa University
Abstract
Pre-cast beam-slab is made of pre-cast reinforced concrete beam together with hollow blocks.
The pre-cast beams are spaced at certain intervals and the hollow blocks are placed on them
to form a working platform with out the use of formwork. The slab HCB, hanging between
the pre cast beams are functioning like a formwork. They give only a temporary support
during the installation phase. Only the pre-cast beams and the slab concrete are load bearing
parts of the slab.
In our country pre-cast beam-slab system is not widely used for construction of most
buildings. The conventional cast institu constructions require lots of formwork and
construction time, which increase the total cost of a project. When pre-cast beam slab
systems are introduced in the construction of buildings, an economical construction could be
achieved.
In the present study, two types of pre-cast beam elements are chosen. Experimental studies
are made on these beam elements by casting them in the laboratory condition. From
experimental observation, there tried to come up with a new theoretical model. Loaddeflection
data was taken from the experiment and compared with the theoretical output.
Furthermore cost comparison is made between the two systems of slab construction. For the
arrangement of panels used to compare cost, the pre-cast beam-slab system of construction is
more economical than the conventional system. Finally, the model gives a hint for future
study in trying to simulate the actual pre-cast beam slab system.
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Keywords
Cost Effectiveness, Precast Beam-Slab, Analysis