Columns play many roles in the landscape.Dig a 2-foot- deep hole with posthole digger; it will be about half the diameter of the cardboard tube. Dig a shallow (4 to 6 inches) depression around the ...

The main goal in this project was to study the behavior of Concrete-Filled Double-Skin Tube (CFDST) columns subjected to fire following earthquake scenarios. For this purpose, the behavior of CFDST ...

If you try to fill the cracks with a hard material, such as more concrete that contains small aggregate like pea gravel or very coarse sand, it will eventually crack as well. The gaps you have are ...

A well-built concrete slab will have reinforcing steel rebar cast in it, or 2-feet-by-4-feet expansion joints every eight feet or so, and even so, it may still crack.

Q. My concrete driveway has eight large slabs. The driveway slopes down from my garage to the street. The straight-line gaps between the slabs has enlarged, and some cracks are as wide as 2 inches ...