Readymix delivered 3km min 4 cubic metres (20MPa) = $225+GST June 2013
Besserblock 400X200- 300 thick $4.50 June 2013 (400X200-200 thick $2.70) Ca 13 blocks/square metre
EcoBlock Specs https://www.eco-blockaustralia.com.au/product-specs.htm
|
Fire Rating* |
2 hours |
4 hours |
4 hours |
|
Sound Insulation* |
42 dB |
51 dB |
51+ dB |
|
Thermal Insulation* U- Value |
R-3.78 0.26 |
R-3.78 0.26 |
R-3.78 0.26 |
* concrete filled
MasonryBock/AACBlock/LifeBlock=GBP130=AUD218/m^2 finished with render.
Target result – with 1 part slag/ash to 8 parts moisten hemp hurd with 28 day strength >7MPa using the binder below ca $140 / cubic meter assuming compacted volume is 5 cubic metres from one tonne slag/ash in the cement. Note the compacted volume = 5 parts Target hurd dry weight per litre 250grams
Activator
- NaOH flakes 20g
- Sodium Silicate solution 20g
- H2O 60g
Cement
- GGBFS 100g
- Flyash 100g
Hempcrete
- Hurd 1 litre loose passing 5mm not 2.5mm sieve mixed with 200g activator (twice the above amount)
- mix hurd and activator well, add flyash and mix then add GGBFS mix well.
- compact well. Compacted volume ca 1/2 litre
- Mix 1.
- 100g GGBFS + 100g Flyash (loose volume GGBFS + Flyash =150ml)
- 580ml mixed hempcrete compacted to 350ml
- Need 7MPa for load bearing wall.
- Area of cylinder A=5,811 test load >=4,000kg (=7N/mm^2*A/10)
- 1 tonne slag/flyash yields 3.5 cubic metres compacted hempcrete (wall 5m x 2m x 350mm thick)