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

1. 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)