Concrete boom pump into ICF / force on plastic ties

[Marc_Bloke]

Hi there,

I'm trying to calculate the force exerted on plastic ties in an ICF system. If the maximum pour height is 3m then the maximum pressure would be 2500 (density of concrete) * 9.8 * 3 (height) = 73.5KPa. The pressure will obviously highest at the bottom, therefore the tie at the bottom will take the highest load. But what will this load be and how will the load be spread to the ties that are higher up? If there is a tie every 0.25m from the ground to the 3m height.

Also - the concrete will be poured from a boom pump from a great height - is there a way to calculate the added pressure from the concrete falling from this height? I've seen one in action and some really fire it out high pressure.

Thanks