1.   And to do a proper job, I think the whole floor should be ripped out before new concrete is laid.

2.   A couple of weeks later, after the concrete has dried, the wood is removed and the tracks are placed on the new concrete.

3.   But a new concrete that can conduct electricity may make it possible to construct buildings in which the basic structure does double duty as an electromagnetic shield.

4.   But capacity has fallen rather than grown in the last three decades because not much new concrete has been poured and the mix of planes has changed.

5.   Can I pour new concrete?

6.   Can we safely apply new concrete over the patio to correct the slope?

7.   Coat the old masonry with a latex masonry bonding liquid, then mix some of this bonding liquid in with the new concrete before pouring it into the form.

8.   Concrete endures, but eventually concrete gives way to new structures and new concrete.

9.   If you pour new concrete on top of the old and the settling continues, it will only make things worse.

10.   If you do put down new concrete, make sure the old concrete is rough enough to hold the new layer.