glass fiber reinforced gypsum (gfrg) by cityrene
TRANSCRIPT
GFRG (Glass Fiber Reinforced Gypsum)An Eco-friendly alternative construction technology by
Why we need
alternative
technology in
construction
Increased
pollution
Water
scarcity
Depletion
of natural
resources
Time
consuming
High
construction
cost
Scarcity of
construction
materials
An Eco friendly solution-GFRG
Introduction
GFRG (glass fiber reinforced gypsum)which is manufactured using gypsum ,a
waste product from the fertilizer industry.
GFRG has been in use since 1990’s in Australia. They used this panels only for
walls. Professors from IIT Madras have extensively researched and found out
this can be used for other structural elements like slabs,roofs,staircases etc.
Standard size of GFRG is 12m length,3m height and thickness of 124mm which
is shown below.
The cavities inside the panel are filled with concrete and other filler
material.
Every third cavity is alone filled with concrete and other cavities can be filled
with materials like fly ash , quarry dust etc.. to make it more cost effective.
Comparison of GFRG over conventional building
Factors Conventional GFRG
Cost Higher than GFRG Can save 20-30%
Time(for G+1) Approximately 6 months 30 days
Eco friendly No Yes
Fire resistant Melts in 1000 degrees Can withstand 1000 degrees for 4
hours
Earthquake resistant Cannot resist earthquake
unless designed separately
Can resist earthquake
(Panels itself acts like a shear
wall)
Cooling effect No cooling effect Cooler up to 4 degrees
Life 50 Years 80 Years
Water resistant No unless water proof coating
is made
Water proof
Carpet area 9” wall thickness,hence less
carpet area
5” wall thickness,hence more
carpet area
Strength Less stronger 5X stronger than conventional
How much you can save with GFRG
75% sand
15% more
carpet area
Tons of CO2
emission
75% water
Cost 20% less
4 degrees cooler
50% of construction time
Cons of GFRG
More space needed for crane movement
Complicated design will make it less economical
Skilled labours needed
GFRG panels should be handled with care while transportation and erection
Need specific machinery for cutting GFRG panels at site
Erection and placing of GFRG panels are a bit difficult
Applications of GFRG As light weight load bearing wall
Horizontal roofs/slabs
As partition wall
As compound wall
Cladding in industrial structures
Pitched roofing
With 2 or 3 panels a small individual house can be
constructed faster and will be cooler than
conventional buildings. Image shows a small
pitched roof building built with 3 panels which is
cut into required size.
Test Results
Weight- light weight
40 Kg/ sqm
Axial load capacity
160 kN/m{ 16 tons/ m}
Compressive strength
73.2 Kg/cm2
Unit Shear strength
50.90 kN/m
Flexural strength
21.25 kg/cm2
Tensile Strength
35 KN/ m
Ductility
4
Fire resistance
Can withstand 4 hours
1000 degrees
Thermal Resistance
R=0.36 K/W
Thermal conductivity
0.617
Elastic Modulus
3000-6000Mpa
Sound transmission{STC}
40
Water absorption < 5% Coefficient of Thermal
Expansion
12 x 10-6 mm/mm/0 C
Sound transmission
coefficient
45
Certifications and Approvals for GFRG
US Green Building
Council (USGBC))Ministry Of
Housing
Development
Government Of
India
Building
Materials And
Technology
Promotional
Council
Indian
Institute Of
Technology
Factories manufacturing GFRG
FRBL FACT-RCF Cochin,Kerala RCF-Mumbai
Stages of GFRG during construction
GFRG cutting drawings
Ordering of panels
Transporting , unloading and stocking of panels
Placing of startup bars
Erection
Cutting of doors and windows
Concreting
Panel lifting procedure
Panel lifting jaw Panel lifting using lifting
jaw
Positioning of panels
GFRG wall joint
L-Joint T-Joint
Some projects with GFRG technology
A 2 floored apartment built by Cityrene builders at Kovalam,OMR(Chennai).
We are proud to say that we are the
first GFRG construction company in Chennai.
This building has other features like Solar to generate power on its own , generating drinking water from thin air, water saving devices,recycling its own waste etc…making it self reliant even during any natural calamity.
To know more about us visit our homepage cityrene
Know about our recent updates at blog.cityrene
GFRG Demo building @ IIT Madras
A two-storeyed building with 4 flats
Built within a month
Affordable rapid construction technology
Total built-up area of 1981 sq.ft
two flats with a carpet area of 269 sq.ft. each, intended for the economically weaker section (EWS),
Another two, with a carpet area of 497 sq.ft. each, intended for the low-income group (LIG).
A-6, Industrial Estate,Mogappair West,Chennai 600037
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