The slabs were bd 230 mm with a fixed floor layer of 30 mm. For your convenience both booklets are available online at bge. Good building design and construction handbook page 4 forewords yiping zhou director special unit for southsouth cooperation, undp good building design and construction. The key advantages of voided slabs start with spans 25 feet and longer. Article pdf available in international journal of concrete structures and materials 121. Now and in the future, were committed to providing safe and dependable natural gas and electric service. Plastic voided slab systems are an alternative to traditional concrete slab construction. It should be large enough to allow the slab to rest on a solid foundation.
Voided concrete slabs rely on recycled materials and generate far less waste. Voided flat plate slabs enable a type of construction that. The versatility of these slabs makes them a good fit for many customized bridge projects. Authorization to photocopy for internal or personal use beyond the. Bges goal is to work with you to install gas and electric service promptly and safely while meeting all construction codes and safety standards. It attempts to utilize the positive aspects of concrete slab construction while minimizing the negative.
Flat plate voided slabs krex kansas state university. Weight saving polystyrene void formers, added at the precast factory, allow for construction of voided slabs with a significant reduction in self weight typically. Innovative structural slab construction practices have taken the. Pdf voided slab systems were developed using segmented void formers such as. Bubbledeck behaves like a spatial structure as the only known hollow concrete floor structure. Bubbledeck voided flat slab solutions technical manual and. The slab construction employed bubbledeck, which precisely sets recycled plastic void formers that look like bowling balls in the hollow deck to displace concrete along the neutral axis. This session discusses stateoftheart practices in voided slab technology.
This section discusses how plastic voided slabs are constructed. One factor in choosing a slab will be the length of time it takes to make. They consist of two thin slabs and ribs connecting them, having the same or better performances than a solid slab, with less concrete used. Voided biaxial slabs, sometimes called biaxial slabs, are a type of reinforced concrete slab which incorporates airfilled voids to reduce the volume of concrete required. Innovative structural slab construction practices have taken the efficiency of traditional slab systems to new heights. However, no matter how basic or complex the floor is, the construction method is similar and includes. Design, serviceability, fire resistance, and construction. Pdf twoway flexural behavior of donuttype voided slabs. Design guide for voided concrete slabs crsi resource. Voided slabs are significantly improved versions of solid slabs and offer more improvements for the building as a whole.
Voided slabs are a precast prestressed slab for bridge, building, marine pier and fish passage culvert replacement applications. Voided biaxial slabs, sometimes called biaxial slabs, are a type of reinforced concrete slab which incorporates airfilled. Experimental study of behaviour of voided bubble concrete slab pdf. Elliptical and torus shaped hollow plastic members, termed as void formers, are held in place by a light metal mesh for easy installation between the top and bottom reinforcement layers of a concrete slab.
The measurements and ratings were carried out in regulation with iso 7171. In this thesis a manual analysis for both longitudinal and transverse direction of voided slab bridge is done as per the. Design, serviceability, fire resistance, and construction article pdf available in practice periodical on structural design and construction 223. The revolutionary technology of flat slab construction by using hollow sphere to replace. The tests reveal that the shear strength is even higher than. This floor system allows for large, clear spans and efficient overall slab thicknesses. Plastic voided slab systems are significantly lighter than solid concrete slabs while maintaining the ability to have large spans. These voids enable cheaper construction and less environmental impact. This reduced the slab s nonaxial dead load by 30% while maintaining biaxial strength, and saved 786 cubic feet of.
Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. Handbook on good building, design and construction in the. Field tests in a raw building in leiden, the netherlands, concerning air and contact noiseresistance. The concept centers on removing concrete mass from the areas of the slab where it is not structurally efficient. Slabs are lighter because less concrete is used in voided slab construction than traditional slab construction. Guidelines for design of voidedslab systems youtube. Beginning with voids made of 100% recycled plastic, this approach lowers the building s carbon footprint makes good use of abundant materials.
Design and construction of twoway spanning reinforced concrete. Because of less concrete quantity is used in voided slab construction, slabs. The construction and design of concrete slabs on grade. Introduction concrete slabs on grade are a very common type of concrete construction. Voided slabs can save money on a project but there are other important reasons to consider using them. Voided slabs eliminate concrete where it isnt needed and the subsequent weight reduction makes longer spans possibleup to 55 feet between. In this booklet, the word vault is used as a general term for these options.
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