Instructables
Picture of Tool for Tamping Earth
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This is a tool for tamping earth.  It has a heavy cast concrete head with a flat bottom.  You pound the earth with it to compact the dirt.  It is a tool that might be used in road work, or for preparing ground prior to pouring a cement floor, etc.

It’s not a tool that many people would ever use.  I have needed one in the past for tamping the ground to compact it before plastering floors and walkways with my nylon-cement construction technique (nylon fishnet and cement).  Now, I need one to help out on some asphalt road work, to tamp and shape asphalt.  I hope it works.  This will be my first time working with asphalt. 

The shaft is a piece of light-weight galvanized tubing.  Holes are drilled, and nails pass through the pipe, helping to lock the cast cement head in place.  I suppose that, if one was making cement dumbbells for weight lifting one could use the same nail technique for locking the cement in place. 

The nails make sure the head stays in place.  Without the nails, use and abuse could loosen the pipe and it could slip out of the cement. 


 
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Step 1: Drill holes for the nails


I use nails 3 1/2 inches long, and a slightly smaller drill to make the holes for them so that they can be driven into the pipe tightly with a hammer.  I use three nails at different angles.  Six holes, in three opposing pairs. 

At the other end of the pipe, I drill a couple larger holes so that I can hang the tool up from a nail in the wall, or an “S” hook from something. 

Step 2: Drive in the nails

Picture of Drive in the nails
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There’s not much to it, just drive the nails in with a hammer.  Make sure that the nail lines up with the hole on the opposite side of the pipe.  If you try to bang it into solid metal, the nail will bend. 

Step 3: Set up for pouring cement


As a mold for the cement head, I used a plastic margarine tub.  This is going to be a fairly light-weight tamper.  If you need something bigger and heavier you may want to use a heavier pipe than I am using here and a larger container as a mold.  

Over my level work table there is a pulley, with a rope system for raising or lowering lights.  I used the system to hang the tool handle, instead.  Lower the handle to the appropriate depth for when it is in the mold.

I cut a hole in the bottom of the butter tub to allow filling with concrete when the tub was inverted, and I used the tub lid as a bottom for the mold.  I used some plasticine clay to fill in some irregularities around the edge inside where the lid joined the tub.  Eliminating irregularities makes the cement surface flatter when it is removed from the mold.  

If the lid has an air space between it and the table, shim it up a little with pieces of cardboard, etc.  You want the bottom of the cast cement to be flat, not with a belly to it. 

I think that the larger tamper I made years ago was made in an inverted container without a lid.  I just sealed where the container joined the non-stick table surface with some clay.  Basically, you just don’t want cement to leak out from underneath the mold container.  

Step 4: Pour the cement

Picture of Pour the cement
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Mix up some concrete (three parts gravel, two parts sand, one part cement) with sufficient water to be able to get it into the mold.  Use a stick to jiggle the cement around some to eliminate air bubbles.

Let it stand until the concrete is hard enough for you to remove the tub mold.  

This tamper has a slightly reddish color because the cement was contaminated with some red pigment from another project.  

Step 5: Remove the mold container

Picture of Remove the mold container
The lid just pops off.  I cut the body of the plastic container with a knife to get it off the cement. 

Before removing the mold, think about keeping the cement moist for a few days while the cement cures.  It cures harder if it doesn't dry out quickly. 

You could leave the cast head inside the plastic mold for a few days, holding in the moisture it already has.  Alternatively, you could remove it from the mold and let the head soak in a bucket of water for a few days. 
This is so cool! I'm planning to build myself a backyard garden shed. This will be perfect for compacting the ground before I pour the gravel and concrete for the floor. Plus I like to idea of making your own dumbbells. Way to go!
kleinjahr4 years ago
Nice simple traditional tool. A slight improvement would be to add a "T" handle. Do remember to wear steel toe boots or shoes, could be a mite painful otherwise.
mosherj84 years ago
What ever you do don't use a cannon shell from WWII like this guy father did, http://www.darwinawards.com/darwin/darwin2010-05.html
Ninzerbean4 years ago
How long do you think this should cure before use? Do you have to spray it with water during the cure process?
Thinkenstein (author)  Ninzerbean4 years ago
I added mention of curing in the final step. Thanks for mentioning that detail.
Thinkenstein (author)  Ninzerbean4 years ago
You are right about curing. It's hardest if it stays wet for a few days. I suppose you could just leave it inside the plastic mold for a few days before exposing it to the air. You could let the head soak in a bucked of water.
cv64 years ago
FYI, another use is tamping dirt around wood posts when doing fencing. Nice job.