Pictures of my Home Made Concrete Mixer
Here are some pictures of the Concrete Mixer I built
using a 55 gallon polyethylene drum.
Here is the mixer itself. You can also see the sand/gravel mix
that I get from down at the river to make concrete with.
Here is a front view of the mixer. The battery you see hanging there
is a counterweight to help me dump the drum when it is full.
Here is a close up view of one of the paddles inside the drum.
The paddles were cut from flat pieces of metal and they are
bolted to the inside of the drum on L brackets.
They are not mounted at an angle to the drum's rotation.
Here is part of the drive system for the mixer.
A 1725 RPM 1.5HP motor drives a 50:1 RA gearbox via a LoveJoy coupler
and the gearbox has a 3 inch sprocket on it and drives a 4.5 inch
sprocket on the drum shaft using a #50 roller chain.
Gives me a final drum speed of about 23 RPM.
Here are some of the paving block molds I have poured.
They are 12inches by 12inches x 3.5 inches thick.
And here is what I have been doing with them so far.
Making a walkway from my parent's house front steps to their driveway.
So far this thing works great.
I make about 1.5 cubic feet of concrete per batch.
This is enough for 4 paving blocks. This takes 20 shovels
of sand/gravel mix and 5 shovels of concrete.
The sand/gravel mix comes from the lower part of our property
where the river floods every spring and pushes it into big piles.
The mixer will hold more than 1.5 CF but any more than that
and it gets too heavy for me to dump it. If I was strong
enough it could mix 3 CF easy. Max capacity is just over 4 CF.