FILLER SLABS

Filler slabs are one cost - effective roofing system which is based on the concrete portions and instead placing filler material there.

Concept

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.

Concrete is very good in withstanding compressive forces and steel bears the load due to tensile forces.

The mechanism The filler slab is to replace the concrete in the tension zone

low-cost and light weight filler materials, which will reduce the dead weight as well as the cost of the slab to 25% (as 40% less steel is used and 30% less concrete).

The air gap in between the tiles makes it a good heat insulator and the ceiling looks attractive as well.

Thus the filler slab as the roof has the following advantages:

• Consumes less concrete and steel due to reduced weight of slab by the introduction of a less heavy, low cost filler material like two layers of burnt clay tiles.

• Enhances thermal comfort inside the building due to heat-resistant qualities of filler materials and the gap between two burnt clay tiles.

• Makes saving on cost of this slab compared to the traditional slab by about 23%.

• Reduces use of concrete and saves cement and steel by about 40%.

Materials Bricks Tiles Cellular Concrete Waste bottleCountry tile, Earthen pots Hollow blocksCoconut shells Thermocol

Omnia Filler Block

ceiling

Hollow clay block roof/floor

The simplest filler is to use two fifth grade Mangalore tiles, that is what is used in our projects, they do not have any structural value- they are mere ‘fillers’.

Filler slab with terra cotta pots as fillers Filler slab roof construction where inverted hemispheres of terra cotta pots are pre cast and made to rest over reinforced concrete beams before the concreting process.

Waffle slab

The roof of the central portion of the building, shaped like adome, is made with brick without using steel or concrete.

Rat trap bond walls and brick arches at openings economise the cost of construction

Precast concrete panel roofing

Composite jack-arch panel roof

Ferro cement channel roof

Composite beam and panel roof

Terracotta flooring

Brick corbelling

Brick arch as a lintel

Omnia Filler Block

Hollow block Masonry

Rat-Trap Bonded Brick Masonry

Rat-trap bonded brick masonry is used to build walls.

The bricks are placed on their edges in 1:6 cement mortar and after the first layer of bricks has been laid, a gap is left between the bricks in the remaining courses

This means that compared to a 230 mm thick solid brick wall, the amount of bricks required to build the wall is reduced by 25 per cent

Reduction in the 10to 15% in the masonry cost

The gap in the bricks helps to create thermal insulation, although it is not a good sound insulator.

create aesthetically pleasing wall surface and plastering can be avoided.

arch Foundations                                                    In an arch foundation, the walls are supported on brick or stone masonry arches springing from a series of square cement concrete bases.

This method helps cut down on the use of materials such as cement, coarse rubble stone and sand etc.

It is also a labour intensive system and requires a high degree of supervision.

Arch foundation is best to use if the condition of the soil is good and the building is low rise

Arch foundation saves material and labour up to 15%