I've used a product called Rockite with great success. I recently drilled a
1-1/2" dia. hole over a foot into existing concrete base (4x4x7 ft) put a
1-1/8 dia stud (with a 1-1/2"dia "nut" welded to the bottom, with flats cut
in the sides of the stud) filled it with Rockite, &it's supporting a US Tower
HDX555 tower. Epoxy wouldn't hold.
73, Joe, WD5FHG
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