AUGREEN Block Wall System

Presentation of
“AUGREEN”
BLOCK WALL SYSTEM
For
Green Council
By: CaSO (HK) Eng. Co. Ltd
Date: 15 August 2008

Why ?
“AUGREEN Gypsum block”
=
“Green” product

Environmental Friendly
GYPSUM BLOCK
VS
CONCRETE BLOCK

Environmental Friendly
8 benefits to our society and
construction industry
Regulate relative humidity (R.H.)
Reuse of Sulphur dioxide(SO 2 )
Energy efficient
Light weight

Environmental Friendly
8 benefits to our society and
construction industry
Less construction waste
Recyclable
Less “wet-trade”
No harm to health

(1) Regulate relative humidity
Absorb moist from air and
release out when R.H.
drops
Stop running water on wall
during February to May

(2) Reuse of Sulphur Dioxide
CaCO 3 + SO 2 CaSO 4 · ½ H 2 O
(i.e. 50% of gypsum block is made by the de-
sulphur gypsum. China light will build FGD
plant to reuse of SO 2 in 2009!)
Prevent production of acid rain

(3) Energy-efficient
efficient
50% saving of energy during
production process for gypsum
than cement
70% more materials can be used
of same tonnage (i.e. Coverage)
>> 70% of production energy
saving per tonnage.

(4) Light-weight
780kg/m 3 - 900kg / m 3
1,950kg / m 3
VS
Less than 1000MT dead load for
20 storey building >> Longer life!!

(5) Less rubbish
Less rubbish from plastering
>> Save $$ on handling
construction waste.

(6) Recyclable
Hydrated gypsum Calcined
gypsum
Recycling process can be done
under heat and pressure

(7) Less “Wet-trade”
Better site environment
Less wastage

(8) No harm to health

Benefits for the
developer
1. More spacious
2. Sound insulation
3. Fire protection
4. Light weighted

Benefits for the
development
5. Good alignment
6. Environment friendly
7. Easy to be maintained
8. Cost savings

1. More spacious
80 mm Vs 130mm (100 mm concrete
block wall with 2 layers of 15mm plasters)
thickness each wall with 2 hrs FRP
100mm Vs 265mm (225mm concrete
block wall with 2 layers of 15mm plasters)
for basement with 4 hrs FRP

2. Sound Insulation
STC From 37dB – 41dB by single
layer, STC 66dB can be achieved by
double wall system
It had been used in Newport cinema
to be the sound insulation partition;
band rooms for BGCA.

3. Fire Protection
2 hrs – 4 hrs FRP can be achieved by
80mm and 100mm gypsum block
It has achieved BD approval in 2005.
www.bd.gov.hk/english/inform/CDB/C
DBOFRP.pdf (Our ref.# BD - E003;
E226)

4. Light Weight
780kg / m 3 of Gypsum Vs 1,950kg /
m 3 of concrete
It is suitable for A&A works for loading
calculation.
It can save some steel rebar at
“footing”

5. Good alignment
Due to the precise “Tongue & Groove”
joint, flat and smooth surface can be
achieved (0.5 mm tolerance)
It does not require plastering so that
painting, wall-paper or tiles can be put
directly on gypsum block

6. Environmental Friendly
It is contribution to our environment
and society without additional cost
It is the worldwide responsibility to
support environmental friendly and it
can obtain more worthwhile
recognition

7. Easy to be maintained
Less wastage; around 1-2% 1
Remedial work for de-bonding of
plastering

8. Cost savings
20% than concrete block with 3m height
because of eliminating 2 layers of
plastering
100% than concrete block with 7m height
because of eliminating steel stiffeners and
plastering
170% than non-structural RC wall

Benefits for the contractors
1. Minimize “wet trade”
2. Construction time saving
3. Good on “load-bearing”
4. Flexible to be changed

Benefits for the
contractors
5. Larger span
6. Less coordination
work
7. Cost savings

1. Minimize “Wet-Trade”
No plastering needed on Gypsum
Block
Less construction waste and better
site condition

2. Construction Time Saving
It can be built at 25m 2 /manday
It can be built independently before
installation of pipes and services
Does not require plastering and steel
stiffeners under 7m height

3. Good on Load-bearing
Pull out test and shear test are 1.4kN &
2.3kN, they prove the loading capacity is
the same as 30MPa concrete, 4-54
5 times
than light weighted blocks
Each anchor can be hanged more than
100lbs with 5 (FOS) Factor of Safety

4. Flexible for pipe &
services installation
Any opening or slots can be filled by small
pieces of gypsum block and gypsum
adhesive
Partition can be built even the fitting out
design haven’t t yet finalized

5 Bigger Span
100mm thick gypsum block wall can be
build up to 7m height partition without any
steel stiffener support
(i.e Based on DIN 4103 part2 and ICE
calculations)
It can replace non-structure R.C. wall

6. Less coordination work
It has no plastering needed, it can
•
save coordination work
It can make an “extra” straight and
•
smooth surface of the wall, there
will be no argument with printing
contractor

7. Cost saving
Besides $$ savings as mentioned, the
intangible cost savings are as follows:-
Rubbish and construction waste handling
Steel stiffeners if required
Replace non-structure R.C. wall
Construction time(30m 2 /manday)
Remedial work on defects handling by de-
bonded plaster

Job Reference in HK & Macau
60+ projects since 2004, including:
Residential
Commercial Offices
Cinema
Shopping Malls
MTR Station
Airport projects
Institutional

2. IFC Phase II
(June 2004)

6. Proposed Residential at
Discovery Bay, Phase 13
(October 2004)

7. Kam Sing Cinema Redevelopment
(November 2004)

9. Goodview Commercial Centre
(February 2005)

15. SkyPlaza Building Works in Airport
(September 2005)

20. Proposed Shopping Mall at Wing Fung Street, Wan Chai -
Swire Properties Project
(December 2005)

23. Station Commercial Works at Diamond Hill
MTR Station
(January 2006)

34. ASD Project – Redevelopment of Yuen Long
Chamber of Commerce Primary School (May
2007)

36. Residential Redevelopment at 38 Shelley
Street, Sheung Wan.
(May 2007)

37. Residential Development at 354 Un Chau Street,
Cheung Sha Wan.
(July 2007)

39. MTRC TKO South Station.
(August 2007)

47.SKYCITY Marriott Hotel Project – October 2007
Airport Authority Project

50. Student Hostel of University of Science and
Technology of Hong Kong (April 2008)