Picking his way over the chunks of broken concrete was trickier than it had looked.

Last year, large chunks of concrete were dropping in the river.

For example, there was an accident a few months ago when chunks of concrete fell into an adjacent building.

What can ruin a big chunk of concrete like that overnight?

He picked up a small chunk of concrete and started to scratch in the dust.

There were chunks of broken concrete and rebar at the bottom.

The marble shattered and a chunk of concrete fell to the floor.

For profit, certainly, he thought, reaching down to pick up a chunk of concrete.

Maybe the old building sometimes shed chunks of concrete?

Carrying the chunk of concrete made climbing difficult, but he still took it with him.