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Voided Slabs As A New Construction Technology-A Review
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Volume Title: ICASGE2023
DOI: ICASGE-RCS
Authors
Department of Civil Engineering, Faculty of Engineering, Menoufia University,
EGYPT.
Abstract
Nowadays, several research concerns studying the behavior of voids in concrete elements specially voided slabs. The concept of voided concrete slabs depends on removing inactive concrete parts without affecting performance of the elements. This can be accomplished by replacing inactive concrete by hollow plastic forms. There are many systems that adopt this concept like cobiax, bubble deck, U-boot, Bee plate, and donut.
If designed efficiently, voided slabs can reduce the volume of concrete up to 35% compared to solid flat plate concrete slabs with similar spans and strength. The reduction in concrete results in less dead load applied to the rest of the structure, which will decrease the size of the columns and foundations. Lower self-weight of the slab will also reduce the effective seismic weight of the structure leading to a lower base shear for the seismic lateral loads.
This research reviews many experimental and numerical studies concerning voided slabs to shed light on their design methods, their advantages and disadvantages, their comparison with other common flooring systems, and finally the possibility of their application in Egypt.
If designed efficiently, voided slabs can reduce the volume of concrete up to 35% compared to solid flat plate concrete slabs with similar spans and strength. The reduction in concrete results in less dead load applied to the rest of the structure, which will decrease the size of the columns and foundations. Lower self-weight of the slab will also reduce the effective seismic weight of the structure leading to a lower base shear for the seismic lateral loads.
This research reviews many experimental and numerical studies concerning voided slabs to shed light on their design methods, their advantages and disadvantages, their comparison with other common flooring systems, and finally the possibility of their application in Egypt.
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