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AMCER Pressed Earth Bricks are a blend of selected
local gravel, sand, silt and clay held together by the colloidal attraction of
the clay.
The clay binds these materials together and minimises water
absorption.
Specifications
| Nominal Dimensions |
85 x 385 x 250 mm |
|
| Dimensional Tolerance |
± 3 %, ± 1 %, ± 1 % |
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| Weight of Brick |
approx 15.80 Kg |
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| Weight per Cubic Metre |
> 1850 Kg |
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| Colour |
Beige/Ochre |
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| Compressive Strength |
> 4.0 Mpa |
Note 1 |
| Modulus of Rupture |
> 150 kPa |
Note 2 |
| Accelerated Erosion Test |
< 10.0 mm pitting depth |
Note 3 |
| Fire Resistance |
> 2-4 Hours |
Note 4 |
| Acoustic Attenuation |
> 50dBA |
Note 5 |
| Thermal Transmission |
<2.90 - W/M2 ° C |
Note 6 |
| Thermal Mass (Lag) 250mm |
>8 Hours |
Note 7 |
Note 1 - Swinburne Compressive Test Results
| Sample |
Maximum Failure Load (kN) |
Compressive Strength
(Mpa) |
| Brick 1 |
416
|
4.32
|
| Brick 2 |
440
|
4.57
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| Brick 3 |
468
|
4.88
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Note 2 - Swinburne Modulus of Rupture Test
Results
| Sample |
Failure Load (kN)
|
Modulus of Rupture
(kPa) |
| Brick 1 |
1.00
|
180
|
| Brick 2 |
1.17
|
210
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| Brick 3 |
1.11
|
200
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Note 3 - Swinburne Accelerated Erosion Test
Test Result – 9.2 mm Pitting Depth
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Classification
|
Pitting Depth (mm)
|
|
Excellent
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0 - <10 mm
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Good
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10 - <20 mm
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Fair
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20 - <30 mm
|
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Poor
|
> 30
mm
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Note 4 - Fire Resistance
No specific testing has been conducted on AMCER
Pressed Earth Bricks. The National Building Technology Centre results concluded
that a load bearing 250 mm Adobe block wall achieved a fire-resistance rating of
4 hours in terms of AS1530, Part4 – 1975. Based on the NBTC test results, the
NBTC concluded that all forms of Earth-Wall construction could be assumed to
have a minimum fire rating of 2 hours.
Note 5 - Acoustic Attenuation
No specific testing has been conducted on AMCER
Pressed Earth Bricks. The National Building Technology Centre published limited
test results indicating that 250 mm Adobe construction would achieve an airborne
sound transmission rating of 50 dBA. The New Mexico Institute of Mining and
Technology publication of 1992 results indicated a rating of 63 dBu
Note 6 - Thermal Transmission
No specific testing has been conducted on AMCER
Pressed Earth Bricks. The National Building Technology Centre published limited
test results indicating the Thermal Transmission of Earth Wall
construction.
|
Wall Thickness (mm)
|
U-Value – W/M2 ° C
|
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250 mm
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2.86
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300 mm
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2.56
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350 mm
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2.33
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400 mm
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2.14
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Note 7 - Thermal Mass - Thermal Time Lag
No specific testing has been conducted on AMCER
Pressed Earth Bricks; this value is based on various reported tests of Earth
Buildings.
AMCER conducts ongoing testing for thermal performance.
AMCER Earth Brick Specifications subject to change
without notice due to continuing research and product improvement.
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