my ipt presentation

Slide 1: 

PREPARED BY P.SAI RANGA RAO CIVIL DEPT VTMT

INTRODUCTION : 

This presentation explains details of various techniques used in the construction The first one is about the Filler Slab The next is about Precast Rc door and window frame Rat trap bond for brick masonary walls Precast cement concrete blocks Brick panel flooring Precast RC planks and joist system INTRODUCTION

Filler slab : 

The filler slab for roofing is a cost effective roofing system which is based on replacement of concrete portions in slab by alternative materials The material used as a replacement include bricks,tiles,cellular concrete blocks etc The system is based on the principle that , the upper portion of the concrete slab is subjected to compressive forces and the lower part of the slab experiences tensile forces The bottom portions of concrete can be replaced by filler materials The adoption of filler slabs result in reduction of dead weight of structure as well as cost Filler slab

FILLER SLAB : 

FILLER SLAB

PRECAST RC DOOR AND WINDOW FRAMES : 

Precast Rc door and window frames are a good alternative to the traditional timber frames They are most suitable for wet areas as they are resistant to termite and fungus They are higher resistant to fire as compared to the wooden frames The size of the frames can be 60*100mm or 70*75mm for single door shutters 60*120mm for double door shutters The frames can be cast in cement concrete with a minimum steel reinforcement of 6mm dia bars or about 1.5% of cross section of the member PRECAST RC DOOR AND WINDOW FRAMES

PRECAST RC DOORS AND WINDOW FRAMES : 

PRECAST RC DOORS AND WINDOW FRAMES

RAT TRAP BOND FOR BRICK MASONARY WALLS : 

Rat trap bond for brick masonry is an alternative bond to the conventional english or flemish bond, generally adopted in construction In this type bond the bricks are placed on the edge in 1:6 cement mortar and a cavity is created The adoption of this bond entails a reduction in the cost of walls upto the extent of 25% when compared with 23cm thick english bond wall No plastering of outside face of walls is required and the wall becomes aesthetically pleasing The air gaps created within the wall helps make the house thermally comfortable The number of bricks and mortar required per cubic metre of brick work also gets reduced It is specially advantageous in low cost housing construction RAT TRAP BOND FOR BRICK MASONARY WALLS

RAT TRAP BOND FOR BRICK MASONARY WALLS : 

RAT TRAP BOND FOR BRICK MASONARY WALLS

PRECAST CEMENT CONCRETE BLOCKS : 

Precast cement concrete blocks can be used for masonary works and are a good alternative to clay bricks They can be used in areas where bricks having adequate strenghts are not available locally These blocks have the advantage of being cast in strenghts varying from 35 to 150 kg requirements Typical dimensions of these blocks can be 400*200*200mm These blocks are made out of cement and aggregates The proportions varying as per the strength requirements of masonary works The blocks can be cast manually or by the use of a machine PRECAST CEMENT CONCRETE BLOCKS

PRECAST CEMENT CONCRETE BLOCKS : 

PRECAST CEMENT CONCRETE BLOCKS

BRICK PANEL FLOORING OR ROOFING SYSTEM : 

Brick panel flooring/ roofing system is a good alternative for the conventional Rcc slabs Brick panels of upto 1.1m can be cast on ground by placing bricks in the required pattern and filling the spaces with mortar or cement concrete Two steel bars runs through each of the panel These panels are placed on partially precast Rcc joists placed across the walls of the room In situ concrete is finally laid over the panels to get an even surface The system has the advantage of ease of construction , speed and economy It is more advantageous in the areas where good quality bricks are available locally BRICK PANEL FLOORING OR ROOFING SYSTEM

BRICK PANEL FLOORING OR ROOFING SYSTEM : 

BRICK PANEL FLOORING OR ROOFING SYSTEM

PRECAST RC PLANKS AND JOIST SYSTEM FOR FLOOR/ SLABS : 

Precast Rc planks and joist system can be adopted for floors/ roofs in place of in situ Rcc slabs RC planks are cast in M20 concrete with thickness of partly 3cm and partly 6cm The width is normally kept as 30cm and the maximum length as 150cm The main reinforcement consists 3 bars of required diameter and the cross reinforcement consists of 6 mm dia bars at 20cm centres The joists are of 15cm square, having 3 bars as main reinforcement at the bottom and 1 bar at the top, which protrudes 3cm above concrete of the joist Traingular stirrups are placed at regular intervals as per design The joists are placed on partially precast Rcc joists are placed in the haunches and in situ concrete is finally laid over the panels to get an even surface PRECAST RC PLANKS AND JOIST SYSTEM FOR FLOOR/ SLABS

PRECAST RC PLANKS AND JOIST SYSTEM FOR FLOORS/ ROOFS : 

PRECAST RC PLANKS AND JOIST SYSTEM FOR FLOORS/ ROOFS

PRECAST RC PLANKS AND JOIST SYSTEM FOR FLOORS/ ROOFS : 

PRECAST RC PLANKS AND JOIST SYSTEM FOR FLOORS/ ROOFS

Slide 16: 

THANK YOU