Flexofom is a tough, flexible, durable, very light closed cell foam material with excellent shockabsorbing and heat resistant properties. It is applicable to the construction of normalweight and structural lightweight concrete floors and slabs made with conventional portland and blended cements. Pdf filler slab as a continuous tbeam slab low cost as. Mm80 is the joint filler upon which aci and pca standards are based. Some of them are outdated and many of them are frequently used everywhere. Pdf filler slab as a continuous tbeam slab low cost as well as.
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. Pdf fillerslab as a continuous tbeam slab ayush srivastava. Filler slabs, consume less concrete and steel as compared to conventional rcc reinforced cement concrete slabs, due to the use of. Mesh tends to keep the cracks and joints from opening up. Suitable for large spans flat, sloping or domed roofs. Filler slab is a low cost structure reducing the dead weight leads to economy in overall. Reported by committee 302 american concrete institute. Study on flexural behaviour of rcc slab filled with hollow roofing. This concrete doesnt add to the strength of the slab as all the tension is taken up by the reinforcement rods. Filler slab roofs a ng new generation roofing technique a roof is a covering component on uppermost part of the building which provides protection from weather primarily against rain. They are commonly found between sections of slabs, bridges.
Design, manufacture and construction of buildings with. Manufacturer metzgermcguire po box 2217 concord, nh 03302 usa phone. Filler slabs is a very effective civil engineering method, but is far less popular to the general knowledge. The filler blocks are 110 mm thick and 260 x 560 mm at top tapering down to 250 x 550 mm at bottom. Filler slab variation of conventional reinforced cement concrete slab simple and very innovative technology hudcosponsored test national building code of india 2005 prof. Location usually determined by the location of the adjacent structure. The filler slab is based on the principle that for roofs which are simply supported, the upper part of the slab is subjected to compressive forces and the lower part of the slab experience tensile forces. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Twoway joist concrete slab floor waffle slab system. Use of costeffective construction technologies in india.
Construction joints key the two edges of the slab together either to provide transfer of loads or to. An expansion joint is an assembly designed to safely absorb the heatinduced expansion and contraction of various construction materials. Filler slab technology is a simple and a very innovative technology for a slab construction. A reinforced concrete roof can be made much lighter and much more interesting by placing 2 mangalore tiles between the steel reinforcement before pouring the concrete. Hi sireesha, the filler slabs will have similar load bearing capacity as only the concrete which is in the tension part of the slab is replaced by the filler material.
With proper supervision and workmanship, leaks can be avoided. Enhances thermal comfort inside the building due to. The reason why, concrete and steel are used together to construct rcc. A new slab system with precast latticereinforced joists began to be developed in germany in the mid20th cen tury, using brick blocks as filler. Rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position instead of conventional horizontal position and. The exces sive usage of cement has led to the implementation of greener approach in building construction. Filler slab is an environment friendly, alternative. May 05, 2011 hi sireesha, the filler slabs will have similar load bearing capacity as only the concrete which is in the tension part of the slab is replaced by the filler material. Jul 11, 2016 rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position instead of conventional horizontal position and thus creating a cavity hollow space within the wall. A filler slab with two stacked clay tiles as shown in the sketch above also increases the thermal insulation of the slab. Construction chemical treatment of the soil around or.
Saving on cost the savings on cost can be from 15 per cent to 25 per cent. A polyethylene sheet is placed over the slab prior to placing the pavement or approach slab. A rc filler slab with nonautoclaved cellular concrete blocks. Filler slab roofs a ng new generation roofing technique. Filler slabs are one such cost effective roofing system which is based on the concrete portions and instead placing filler material ther. Where units are to be used in exposed wall construction, the face or. However, this slab required extensive formwork and falsework and had a high selfweight, making it unsuitable for todays requirements. For example, in a 4inch 100 mm thick slab the joint spacing should be about saw cut tooled wall or column expansion joint material slab on grade column contraction joints intersect at diagonals of the square form openings which will be filled after floor has hardened concrete cracks below joints slab isolated from. Rat trap bond brick wall construction by earthbound. In addition, it is waterexpellant, weatherproof and highly resistant to many chemicals. Flooring and roofing play a major role in the construction of dwellings. The structural modeling used in most commercially available software, where stems are considered as disjointed from the topping slab does not deliver the advantages associated with waffleslab slab construction. A new slab system with precast latticereinforced joists began to be developed in germany in the mid20th century, using brick blocks as filler and a. As roofs are just covering components, live loads will not act upon it.
Hence this work highlights on the behaviour of filler slab using self. Filler slab technology practical action sri lanka practical answers. Concrete is good in taking compression and steel is good in tension. Home resources construction building design filler slab technology. Waffle slab or ribbed slab construction procedure and. Filling and sealing of joints and cracks in concrete pavements the problem of preventing the infiltration of water, silt, sand, and other earthy materials into the joints and cracks in concrete pavements is one that has been exceedingly troublesome to highway engineers ever since con crete pavements first came into existence more than 40 yr. The faces should be well compacted during construction to give a smooth finish which offers little resistance to vertical movement.
This guide presents information relative to the construction of slabonground and suspendedslab floors for industrial, commercial, and institutional buildings. Concrete floor slab construction process includes erection of formwork, placement of reinforcement, pouring, compacting and finishing concrete and lastly removal of formwork and curing of concrete slab. Use of costeffective construction technologies in india to. Aug 06, 2015 filler slab technology is a simple and a very innovative technology for a slab construction. Precast concrete structures are economical, can be constructed relatively quickly, and make use of inplant quality control processes to ensure consistency in the concrete material properties, curing. It can be used in the construction of various structures like wall masonry with arched openings, jack arches and domes for roofing. The slab filled with lighter filler materials is known as the filler slab. Consumes less concrete and steel due to reduced weight of slab by the introduction of a less heavy, lowcost filler material like two layers of burnt clay tiles.
To sum it up, consider using a filler slab for the following. Skill construction smart window rendering sand and cement below window with simple tools duration. Joints in precast parking structures for many years, precast concrete has been a mainstay in the construction of aboveground parking structures. In this work i have shown the demonstration and use of fillerslab in building construction to reduce cost of. The chance of a leak in a filler slab is much the same as the conventional r. The aesthetic and acoustic properties of using various materials as fillers must be utilized. If the slab contains wire mesh, cut out alternate wires, or preferably discontinue the mesh, across contraction joints. Rat trap bond brick wall construction by earthbound architecture. This sheet is a bond breaker, allowing the pavement and approach slab to move freely over the sleeper slab as they expand and contract. The flexible polyethylene foam for engineering construction. Johnson, extension entomologist introduction termites cause extensive damage to buildings. Sl90 meets andor exceeds the floor joint filler guidelines set forth by the american concrete institute 302. Application of a chemical to soil around the foundation. Bottom view of filler slab fillerslab as a continuous tbeam slab l ow cost as well as increased strength.
Filler slab free download as powerpoint presentation. Construction the filler material and sealant should be capable of accepting the required expansion and offer little resistance to any compression. Rcc slab, rc filler slab, mangalore tile, strength, stiffness. Filler slabs, consume less concrete and steel as compared to conventional rcc reinforced cement concrete slabs, due to the use of lessheavy, lowcost filler material such as rejected calicut tiles, clay pots and broken pieces of cement blocks. Jan 31, 2009 a reinforced concrete roof can be made much lighter and much more interesting by placing 2 mangalore tiles between the steel reinforcement before pouring the concrete. Reduce use of energy intensive materials embodied energy. Flexofom is purposely developed for engineering construction based on polyethylene foam. Concrete is very good in withstanding compressive forces and steel bears the load due to tensile forces. Waffle slab requires only 70% of concrete and 80 % of steel from the concrete and steel used for stiffened raft.
The sleeper slab is finished smooth and allowed to cure. Minor cracks, incidental to the usual method of manufacture or minor chipping resulting from customary methods of handling in shipment and delivery, are not grounds for rejection. Moreover, improvements to past designs using current technology can significantly improve performance. Proper and timely construction practices, in addition to. This guide presents information relative to the construction of slab onground and suspended slab floors for industrial, commercial, and institutional buildings. Filling and sealing of joints and cracks in concrete pavements. In this article, ill give a detailed explanation of each slab and where to use a particular slab. It is applicable to the construction of normalweight and structural lightweight concrete floors and slabs made. Design and construction of joints for concrete streets. It is a method in accordance with aci 360 design of slabsonground.
The construction of waffle slabs can be done by three ways as follows. For flat plate slab system, the minimum slab thickness per aci 31814 are. Nov 23, 2016 filler slab roofs a ng new generation roofing technique a roof is a covering component on uppermost part of the building which provides protection from weather primarily against rain. The aesthetic and acoustic properties of using various materials as.
The filler materials are used in the lower tensile region of the slab, which needs only enough concrete to hold the steel reinforcement together. Waffle slab is good against shrinkage and it is lower than stiffened rafts and footing slabs. Application of rcc filler slab floors and roofs ijrerd. A rc filler slab with nonautoclaved cellular concrete. The reason why, concrete and steel are used together normal rcc roof to construct rcc slab, is in their individual properties as separate building materials and their individual limitation. Past performance of local streets is also an excellent source for establishing joint design. Speed dowel speed dowel provides a practical dowel alignment method. In this work i have shown the demonstration and use lightweight filler material which can be accommodated in of fillerslab in building construction to reduce. Waffle slab or ribbed slab construction procedure and advantages.
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