Do you know of anyone who has experience with Foamed Concrete and pumping it over 1300m

Thats a long way....... 1300 meters?

I dont think the foam will hold to pump that long , what density on the mud ? Steel or rubber ? And it will be buildup in the pipes quick if it's warm and sunny out-side , pour it on the night. Pump slow so You dont ruin the foam , You press it together.... I have seen 9m3 going in the pump and out has come 6-7 m3 !

Vasa is right, It will probally collaspe. Need a foam injector closer to the pour. A 'ghost' plants farther down the line. Call Pacific International Grout Co. 1-360-733-5270 I know they once pumped though 20,000 feet of 4 inch line in a tunnel before!!!!!(Just Portland cement and water slurry mix, but still a hellavalong ways!!!!)

The plan is for 600kg/m3. Total pour will be around 4000m3 Everyone here is talking only peristaltic.Schwing rock with new wear parts will handle water so done gently should be ok. I appreciate all your feedback. Thank you.Rod

Hi Todd, been a while.

In my past concrete life I did a lot of grouts and foamed concrete.  “Foam Concrete” is nothing more then  supercharged air then has extended life for stabilization.  There are several manufactures that make this admixture product and all are pretty much the same.  We could take 4 cubic yards in our mixer truck and blow it up to 9 cubic yards in volume.

So with this think about millions/billions of air bubbles in the mix  and the trick is not to fracture them, ( like popping soap bubbles) hence the massive air particle space is what gives the final dried mix the PCF , pound per cubic foot it’s light weight due to the voided space created by the air bubbles.  The material generally is not for any structural values but used for fills. If you “crush" the mix you not only lose you PCF in place volume, but will have a considerable pour shortage.   The true correct way to pump this is with a screw pump, but a piston type of pump will work as well as long as it is slow and easy, 2^nd at the discharge end a free fall from the hose line will also destroy this type of mix, better to flow it in.

Hope this helps,

Bob Miller  

Have pumped it 1500m on a fuel line fill job at heathrow airport but the line was about 8". used a 1406 s valve putz and the valve had a fair bit of build up in it at the end of the job.  Would think you would be better off with a big rotary/squeezer pump and match the line to the size of the pump so no reduction.