1. AFFORDABLE HOUSING WITH PRECAST CONCRETE TECHNOLOGY
SHEELA ESHWARIAH
M.Tech, MBA
CHIEF ENGINEER, HOUSING DEPT, TELANGANA

2. Affordable Housing…..
5 times of yearly income
@ Rs 20 lakhs…i.e Rs 2500/sft for a house of 800sft
Cost of land..??
Cost of construction…?? Rs …../sft

3. Conventional RCC/ masonary
Widely accepted
Can make alterations within the frame on a later date for individual requirements
More number of conventional contractors
More time taking
More wastage of material
Needs more supervision during execution and finishing

4. Precast technology….. Monolithic RCC/ Composite sections…
Shift from Process quality to Product quality
QC in the casting yard
QC in transportation, hauling and placing
QC in jointing

5. Building design parameters…
Safety
Strength… ..against failure from all loads , forces of wind/ earthquake and all moments ..
Stiffness……to resist against deformation and dimensional stability.
Durability…against vagaries of environment
Affordability ….cost
Sustainability...??

6. Economical factors… Employment potential Develop local enterprise
Use of indigenous materials

7. Environmental properties
Environmental factors
Embodied energy
Carbon Footprint
Waste on dismantling
Material
Strength properties
Environmental properties
Elastic Modules
(MN/m2)
Density (Kg/m3)
Energy
(MJ/T)
Carbon kg CO2
Brick
30000
1800
2966
706/cum
Timber(Sawn)
110000
500
2500
490/Mt
Mass Concrete
14000
2400
1274
124/Cum
Reinforced Concrete
2700
24000
8300
780/cum
Steel
210000
7800
43000
4116/Mt
Aluminum
70000
260000
25480/Mt

8. Thermal comfort Thermal performance Index of Envelope
Mean radiant temperature
No of air exchanges
Tropical summer Index
Duration of comfort

9. Sustainability indicators (39) IS:21929-1
adaptability : ability to be changed or modified to make suitable for a particular use
areas of protection : aspect(s) of the economy, the environment or society that can be impacted by construction works, goods or services
building : construction works that have the provision of shelter for its occupants or contents as one of its main purposes; usually partially or totally enclosed and designed to stand permanently in one place
built environment : collection of man-made or induced physical objects located in a particular area or region.
Disposal : <status change> transfer of ownership of, or responsibility for, the object of consideration
Disposal : <end of life> transformation of the state of a building or facility that is no longer of use

10. economic indicator : sustainability indicator related to an economic impact
environmental indicator : sustainability indicator related to an environmental impact
functional performance : type and level of functionality that is required by stakeholders of a facility, building or other constructed asset
functionality: suitability or usefulness for a specific purpose or activity 
heat island effect : phenomenon of elevated temperatures in urban and suburban areas compared to their outlying rural surroundings
impact category : class representing an economic, environmental or social issue(s) of concern (areas of protection) to which analysis (assessment) results may be assigned
indicator : quantitative, qualitative or descriptive measure representative of one or more impact categories

11. indoor air quality : quality of air inside a building, described in terms of odour, chemical and biological pollutants
level of functionality : number indicating the relative functionality required for a user group or customer for one topic on a predetermined demand scale from the level of the least (functionality) to the level of the most.
 level of serviceability : number indicating the relative serviceability (capability of a facility) for a user group or customer for one topic on a predetermined supply scale from the level of the least (serviceability) to the most
life cycle : consecutive and interlinked stages of the object of consideration
life-cycle cost,LCC : cost(s) of an asset or its parts throughout its life cycle, while fulfilling its performance requirements
life-cycle costing : methodology for systematic economic evaluation of life-cycle costs over a period of analysis, as defined in the agreed scope

12. maintainability : ability to retain a building in a state in which it can perform its required functions or to restore a building to such a state when a fault occurs
non-renewable resource : resource that exists in a fixed amount that cannot be replenished on a human time scale
performance : ability to fulfil required functions under intended use conditions or behaviour when in use
period of analysis : period of time over which life-cycle costs or whole-life costs are analysed
renewable resource : resource that is grown, naturally replenished or cleansed on a human time scale

13. serviceability : capability of a facility, building or other constructed asset, or of an assembly, component or product thereof, or of a movable asset, to support the function(s) for which it is designed, used, or required for use
set of indicators : non-structured list of indicators
social indicator : sustainability indicator related to a social impact
stakeholder : individual or group that has an interest in any decision or activity of an organization
sustainability indicator : indicator related to economic, environmental, or social impacts
system of indicators : structured list of indicators

14. thermal comfort : condition of mind derived from satisfaction with the thermal environment
Note 1 to entry: Thermal comfort is the combined thermal effect of environmental parameters including air temperature, vapour pressure, air velocity, mean radiant temperature (fixed factors) and clothing and activity level of occupants (variable factors).
visual comfort : occupant satisfaction with the indoor visual environment, described in terms of illumination level, glare, visibility, reflection and psychological and physiological content with natural and artificial illumination
waste : substances or objects that the original holder has disposed of or intends to or is required to dispose of
whole-life cost : all significant and relevant initial and future costs and benefits of an asset, throughout its life cycle, while fulfilling the performance requirements
whole-life costing : methodology for systematic economic consideration of all whole life costs and benefits over a period of analysis, as defined in the agreed scope

15. Special care required…
Handling and placing of components
Adhesive durability
Thermal comfort:
location of openings
No of air exchanges
Post operations by Plumbers
Safety notices on the event of Earth quakes
Safety in electrical wiring

16. Precast technology - requirments
Validation of Design as a unit
Performance guarantee
Design standards and Quality Manuals
Hand hold train to local masons

17. Precast technology - requirments
Development of Design standards and Quality Manuals
Development of training packages for professionals and Artisans
Development of Maintenance procedures
Working out Output norms and rates for Machinery, equipment and labour.

18. Thank You.