Glacial Till is much like concrete...but you cannot set smaller nails, they will not hold.
Does anyone drive rebar into this type of soil? What do you use?
I looked at old posts about rotary hammers, but I am concerned with the rebar "pretzeling".
Thanks,
David
> Glacial Till is much like concrete...but you cannot set smaller nails, they will not hold.
>
> Does anyone drive rebar into this type of soil? What do you use?
>
> I looked at old posts about rotary hammers, but I am concerned with the rebar "pretzeling".
If you use a 5/8" bit to drill the hole, a #4 bar should drop right in without a fight. The longest 5/8" hammer drill bit I have found is 22", so you'll have to tolerate 2 inches of the rod sticking up or shorten it if the hole bottoms out on hard rock.
> I looked at old posts about rotary hammers, but I am concerned with the rebar "pretzeling".
By delivering thousands of relatively small blows, rather than a few heavy blows, the jack hammer is actually less prone to bending the rod than the sledge is.
It will probably be difficult to drive or drill anything straight into that stuff.
> It will probably be difficult to drive or drill anything straight into that stuff.
It probably depends upon the gradation of the rock material mixed in with the granular material in the till. If there are lots of hard rocks with sloping faces, yeah, trying to drill through them probably will be an unhappy experience.
> The longest 5/8" hammer drill bit I have found is 22"
BTW, in my search I found the one above: 37" (usable).
> > It will probably be difficult to drive or drill anything straight into that stuff.
>
> It probably depends upon the gradation of the rock material mixed in with the granular material in the till. If there are lots of hard rocks with sloping faces, yeah, trying to drill through them probably will be an unhappy experience.
I know that me and my sledge hammer has been an "unhappy experience" so far.
> > I looked at old posts about rotary hammers, but I am concerned with the rebar "pretzeling".
> By delivering thousands of relatively small blows, rather than a few heavy blows, the jack hammer is actually less prone to bending the rod than the sledge is.
Agreed. The harder the soil, the more you have to "love" it in. Works with soil cement and rods and asphalt and nails.
Why not use No.5 rods? Small difference in diameter, over half again more surface area. Will take a greater beating.