Concrete floor slabs may be in situ or prefabricated. Construction live loads on slab formworks before concrete placement. Concrete slab types construction, cost, and applications. Slabonground construction is the most commonly used method for residential floor construction as it provides an even, durable, waterproof, maintenance free structure. The method of proof rolling well help us to know whether the full layer of soil is able to behave as a supporting system i. Ceramic slabs, also called ceramic tiles, are any tile made out of clay and have been around for 4,000 years. Construction of slabs on ground design considerations aci. Method of statement construction of flat concrete floor. The reason why, concrete and steel are used together to construct rcc slab, is in their individual properties as separate building materials and their individual limitation. Gallery of the tallest residential building in the world is coming to new york city 3. Eliminating drops results in simpler falsework and formwork arrangements, enabling rapid floor construction and giving maximum flexibility to the occupier.
This guide presents information relative to the construction of slabonground and suspendedslab floors for industrial, commercial, and institutional buildings. The construction and design of concrete slabs on grade d. A new simplified procedure to estimate loads on slabs and shoring during the construction of multistorey buildings article in engineering structures 335. The attached excerpted resource materials have been made. Ou tmb element manufactures ribbed slabs with prestressed reinforcement product. The slab is the flange of the beam and the extended part is the web. In reality, sandwich slabs are ribbed slabs with a slab placed both to their upper and lower surface. Slip suspension of clay in water, used as a glue or for decorating. Use of costeffective construction technologies in india to mitigate climate change nilanjan sengupta concentration of greenhouse gases play major role in raising the earths temperature. Form and reshore loads were measured over a complete construction cycle for two highrise slab. Waffle slab or ribbed slab construction procedure and. Waffle slab or ribbed slab is a structural component which is plain on its top and contains grid like system on its contents. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. All the electrical appliances can be installed easily in the gap of the ribs which can be architecturally aesthetic.
Slab foundations can also be purchased and laid in concrete blocks. Flatslab construction definition is reinforcedconcrete floor construction not requiring beams and girders to transmit the floor load to supporting columns. Once the site waste management requirements have been assessed and implemented, the slab area is prepared by removing all vegetation, levelling the surface, excavating the. After the blinding is casted and placement of waterproofing is done, the preparation and casting for slab on grade shall be done. Liftslab construction is a precast method of construction of slab on the ground and then lifting it to the structure. Asce, secb course content slab on grades construction. Use of costeffective construction technologies in india. The ribbed floor slab systems of pier luigi nervi form finding lab. This is another useful construction video tutorial presented by sami ullah stanikzai, the renowned engineer. There are 16 different types of slabs in construction. Architecture symbols architecture design simple workbench plans brutalist design door jamb house information wood exterior door door detail diy door.
Slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs, bridges, and other types of structures. Rib and block slabs installation by royal concrete slabs. Concrete construction how to build high quality slabs on. Findotek date rev no prepared by checked by approved by remarks. Recover your resources reduce, reuse, and recycle construction and demolition materials at land revitalization projects w h a t s i n d y o u r u. The stem walls retained compacted fill material for support of the concrete slabs. Additional reinforced internal ribs are then used in the slab by introducing pontex, the structural cupolex accessory to provide a structure capable of spanning between foundations or piles. This is an important section to read prior to ordering. Structural steel composite slab 1 of 7 rev design project. In this article, ill give a detailed explanation of each slab where to use particular slab.
New nautilus allows for the construction of flat intrados with spans up to 1516 m, while skydome spans are smaller roughly 14 m but still create an aesthetic finish. These bulkheads are often used as screed rails during placement and finishing of the slab. Construction detail in a 105 mm wall, with s and flat profiles. A rc filler slab with nonautoclaved cellular concrete. Concrete is good in taking compression and steel is good in tension. How are slabs poured in the home construction process. For socalled shotcrete applications such as tunnel linings and swimming pools, the concrete mixture is blown under high pressure through. The thickened concrete slab edge must extend at least eighteen inches below finished grade, be at least twelve inches in width, and provide a slab height of at least six inches above finished grade. Pdf comparison between ribbed slab structure using. Pdf ribbed slabs have been widely used in buildings due to their many. A renaissance of form by lyla goldstein forget the mug, making a cup and saucer is a return to style and class. Because of the ribs and double reinforcement, it is more stable and recommended for larger span slabs or foundations. The use of flat slab building provides many advantages over conventional rc frame building in terms of architectural flexibility, use of space, easier formwork and shorter construction time. Reported by committee 302 american concrete institute.
Carbon dioxide, produced from burning of fossil fuels, is the principle greenhouse gas and efforts are being. Structural ribbed concrete slabs the cupolex floor slab can be fully or partially suspended on piles, stem walls or gradeedge beams. While the wheel provides a way to quickly and efficiently produce multiple round forms, handbuilding allows me to slow down and enjoy the whole clay experience in a much more relaxing way. Reusable formwork in abs technopolymer for oneway ribbed slabs. The slab may be supported by walls, by reinforced concrete beams usually cast monolithically wit. Singh central building research institute, roorkee, india abstract flyash is a major industrial waste which pollutes the atmosphere. One of the most comprehensive resources available for designers, contractors and facility owners that can help them avoid potential debacles during concrete floor construction is the american concrete institute aci guide to floor and slab construction. At this stage, it is good practice to revisit the concrete slab cost estimate used during planning and budgeting stage.
Work on plaster board sheet rock, drywall board to keep the slabs flat and to absorb the moisture in the clay. For spans over 9 m posttensioning should be considered. Costs represent work that progressed during a 2year time cost and time study for. Identifying cracks in slabs concrete construction magazine. These elements can also be recovered after use, saving time and money. Slab foundations are often laid over soilbased areas.
The construction and design of concrete slabs on grade. A slightly deeper section is required but these stiffer floors facilitate longer spans and provision of holes. The aim of this study is to demonstrate that oneway ribbed slab with lightweight foam concrete can be used to reduce the dead load on slab concrete structure. The two remaining concrete slabs were supported on compacted fill pads. Concrete slab construction, pouring a concrete slab.
Waffle slab construction process includes fixing forms, placement of pods on shuttering, installation of reinforcement between pods, installation of steel mesh on top of pods, and pouring of concrete. The lateral loads are independently resisted by shear walls. A slab pour requires efficient planning so that all of the elements that go into producing a highquality slab are done in time before the concrete sets and done correctly. Fix the reinforcement steel as per the approved drawings, sometimes a393 brc mesh is indicated in the drawing and most commonly use in 250mm thick concrete grade slab. They provide an easy method of setting a base foundation by simply pouring the slab foundation mixture over the area and leaving it to harden. Construction joints should be worked into the overall joint plan, where they can also function as contraction joints. Ribbed slabs oneway joists introducing voids to the soffit of a slab reduces dead weight and increases the efficiency of the concrete section. Pdf construction live loads on slab formworks before. Your foundation should be leveled, consistent and in accordance with the local building code. What are the 16 different types of slabs in construction. The attached excerpted resource materials have been made available for use. Concrete slab construction requires great deal of preparations prior to the actual pouring concrete slab which should be part of slab on grade design as well as concrete slab insulation if extreme hot and cold is to be considered in your area.
Introduction concrete slabs on grade are a very common type of concrete construction. Some of them are outdated and many of them are frequently used everywhere. Ribbed slabs types and its advantages in construction. Learn what is a jamb and how to measure the width of your door jamb. Construction joints are formed using some sort of bulkhead, made of wood, steel, plastic, or precast concrete. It is applicable to the construction of normalweight and structural lightweight concrete floors and slabs made. Ribbed or waffle slab is a slab system which consists of series of parallel reinforced concrete t beams framing into reinforced concrete girders. Comparison between ribbed slab structure using lightweight foam concrete and solid slab structure using normal concrete. Waffle slab or ribbed slab construction procedure and advantages.
Sandwich slabs may have the disadvantage of a larger weight compared to the ribbed ones but on the other hand, they have the advantage that their spans and supports behave in the same proper way. Ribbed and waffle slabs types, advantages, disadvantages. We, like many in the industry, have struggled to get consistently level slabs and reduce the amount of money spent on floor leveling products. From that experience, our teams of architects, engineers, and construction managers have developed the following steps to improve slab levelness results. Reinforcing steel for slabs is primarily parallel to slab. For underwater construction, the concrete is placed in a large metal tube, called a tremie, with a hopper at the top and a valve arrangement at the submerged end. Slab construction process concrete slab construction methods. One of the most vital steps in the home construction process is the foundation of the building. Column rcc reinforced cement concrete column is a structural member of. Things we learned along the way how are slabs poured in the home construction process.
Slab system for construction of commercial buildings. They have been found in pyramids, the ruins of babylon and the ruins of ancient greek cities, according to design boom. The slab is propped at the centre during construction stage. If these are not available, use a bat or board covered in sturdy canvas. Data is taken from manufacturers tables yield strength of steel, f. A type of precasting used in building construction involves casting floor and roof slabs at or near ground level and lifting them to their final position, hence the name liftslab construction. System for the construction of lightened bidirectional slabs with flat intrados and. A new simplified procedure to estimate loads on slabs and. Construction joints in concrete slabs the concrete network. Slab thickness of ribbed or waffle slabs is less than other slab systems. The spacing between the ribs should be in general 2030 inch. Slab construction a construction technique in which clay is rolled into thin sheets and manipulated into shapes. Ribbed or waffle slabs are an easy solution for this purpose.
Reinforced concrete ribbed slabs with widebeam lajes. Filler slab technology is a simple and a very innovative technology for a slab construction. Although there are more sophisticated ways, a simple clear plastic crack comparator is often all thats needed. Join veejay gahir for an indepth discussion in this video basic slab construction, part of surfacing an f1 wheel in alias. The code recommends that the ribs should have a width bw not greater than 100 mm. The cross section of the profiled sheeting is shown in fig. Check the adequacy of the continuous composite profiled deck slab with spans of 3. Pdf comparison study for various structural slab systems ismaiel. The tt slab consists of an upper board and two longitudinal ribs. A rc filler slab with nonautoclaved cellular concrete blocks for sustainable construction m. This document is intended for the use of individuals who are.
In this video, sami shows in detail how to estimate the quantity of cement, sand and aggregate for a concrete slab. The total cure time allowed for the slab was five full days. Twoway joist concrete slab floor waffle slab system. For cracks through the concrete, it is also important to know if the crack is active or moving. Method statement for pouring concrete on slab on grade. Ceramics definitions chandler unified school district. Twoway joist concrete slab floor waffle slab system analysis and design design the concrete floor slab system shown below for an intermediate floor with partition weight of 50 psf, and unfactored live load of 100 psf. Slab construction 1 roll out the slab to approximately ikinch with a rolling pin using guide sticks to assure even thick ness.
Nervi, ribbed slabs, isostatics, floor systems, computational tool. Wedging the process by which air pockets are forced out of the clay and the clay is mixed. A slab foundation is a foundation that is made of a concrete slab. In addition, i enjoy the ability to add textures and decoration at every step of the forming process from soft slab to leather. To this end, visits were made to con struction sites and slab manufacturing plants, and interviews were held with designers, manufacturers, construction site engineers, builders and workers helpers, bricklayers, and master builders. Waffle slab grid slab it is a type of reinforced concrete slab that contains square grids with deep sides.