I hired a concrete contractor to lay some concrete blocks and frame a window
opening. In the process of mixing/pouring/forming the concrete, he spilled
quite a bit of concrete onto my deck which is red brick with black grout.
Now I have a thin layer of concrete on top of my deck about 40 square foot
or so. I mentioned it to him and he said I am responsible to prep the area
and I should know it's going to be messy.

I tried to scape it off and it's not coming off. I don't know if there is a
tool to chip them out or am I stucked with replacing my entire deck if I
can't find 40SF of matching bricks.

MC