COMPARISON OF CONVENTIONAL AND NONCONVENTIONAL

CONSTRUCTION

GUIDED BY;DR. SURENDRAN A.,

HOD & PROF OF CE DEPT.

GROUP MEMBERS

BINI A.V.CHANDNI P.K.DHANYA U.SRUTHY P.SUSAN SUNNY KOCHERIL

PIONEER OF COST EFFECTIVE MOVEMENT IN INDIA

INTRODUCTION

Ar. Laurie Baker is one who worked on cost effective construction technique as its best.

Baker showed, in fact , that sustainable technologies when adopted with care and creativity, could lead to a unique architectural expression.

RELEVANCE

VARIATION IN COST

BUILDING COST Building Material Cost : 65 to 70 % Labour Cost : 65 to 70 %

( As per Central Building Research Institute (CBRI))

COST EFFECTIVE BUILDING MATERIALS

The basic aspect in the choice of a material

“EMBEDDED ENERGY”

COST EFFECTIVE BUILDING MATERIALSStabilized Compressed Earth Blocks :- Are made of mud with suitable percentage of cement and compacted in block making machine with no burning.

Economical, stronger, low embedded energy and simple to manufacture

Reconstituted stone blocks / Stone filler blocks If small pieces of stone only are

available, ‘reconstituted stone blocks’ provides the best alternative masonry block.

Can be used for foundations and walls.

Waste material content 30-40% by volume of block.

Validated by BMTPC, IS 12440-1985

Better facing

COST EFFECTIVE TECHNOLOGIES FOR DIFFERENT BUILDING ELEMENTS

WRONG CONCEPT OF FOUNDATION

Conventional method

Foundation in comparatively hard soil

Better option

FOUNDATION

Random Rubble masonry with mud mortar

Foundation cost : 10 to 15% of total building (approx)

FOUNDATION Arch foundation

Under ream pile foundation

FOUNDATION USING BAMBOO

BAMBOO PILES IN MUDDY SOILS

Bamboo reinforced surface beams in lime concrete

Under reamed piles

Most economical pile

WALL

STABILIZED MUD BLOCK WALL

ARTICULATED SLENDER MASONRY

RAT TRAP BOND WALL

FEATURES OF RAT TRAP BOND WALL

Uses 425 bricks per cubic meters instead 500 bricks.

Saves mortar. Thermal comfort. Can be left exposed, saves external

plaster. Tested and validated by Anna

University.

LINTEL

ROOF Bamboo roof slab RCC Filler slab

Ferro cement channels

Rural house

Funicular shell Bricks/ waste stone laid in a doubly

curved profile with a shallow rise at the centre.

Utilizes waste material Reduction of cement and steel

Paint is an important material used in construction, which is

“Non recyclable”

FINISHES• Exposed masonry with pointed finish• Non erodible mud plaster• Lime plaster• Lime-cement combination plaster• Natural extracts as paint (cashew oil,

bee’s wax, linseed oil)• Clay with adhesives as paint • Lime wash

Exposed brick masonry with flush pointed finish.

PROGRESS OF PROJECT Works have done:

1. Preliminary Study on conventional materials

2. Data collection of various non conventional materials

3. Study of practical applications of nonconventional technique

4. Planning and specification for a building in both conventional and

nonconventional system5. Training programs and discussions

regarding relevance in COSTFORD and Kerala State Nirmiti Kendra.

Works to be done :

1. Quantity survey of the conventional and nonconventional residential

building

2. Stabilized mud block manufacturing and testing

3. Reconstructed laterite stone blocks manufacturing and testing

4. Energy auditing

5. Filler slab design as per grid beam theory

CONCLUSION

Relevance of the topic with respect to the present scenario.

What we young engineers could promise our society