A tree root lifted part of the sidewalk leading to my door three
inches. I cut the root so it won’t grow and am going to pour a
concrete ramp on top of the existing sidewalk so no one trips anymore.

Is there anything wrong with the following?

Use Concrete Mix to go from three inches to two inches. Use Sand/
Topping Mix to go from two inches to 3/8 inch.

Make it 36 inches long – approximately one inch drop per foot -- which
means 15 inches long to go down to two inches and 21 more inches to go
down to 3/8 inch.

Build forms on either side of the existing sidewalk, going from three
inches to 3/8 inch, with a piece going across to stop it at two
inches.

Clean and wet the existing sidewalk.

It’s not necessary to paint on Concrete Bonding Adhesive to the
existing sidewalk, as this is just a little job for a sidewalk that
gets little traffic.

Mix the concrete mix a little thick because it has to maintain the
angle of the ramp. Pour it into the form. Use a screed – i.e. a 2x4
to level it and push it down, getting rid of air bubbles. Use a
trowel to make sure it’s level and there are no low places to gather
water.

Let it dry long enough so you can safely remove the cross piece at the
two inch mark without the new concrete falling.

Mix the Sand/Topping Mix a little thick because it has to maintain the
angle of the ramp. Pour it into the form from the new concrete at two
inches to the end at 3/8 inch. Use a screed – i.e. a 2x4 to level it
and push it down, getting rid of air bubbles. Use a trowel to make
sure it’s level and there are no low places to gather water.

It’s not necessary to paint on Acrylic Concrete Cure and Sealer to
the new concrete, as this is just a little job for a sidewalk that
gets little traffic.

It’s not necessary to wet down the whole thing a few times a day for a
couple of days because the temperature will be 50 to 78 degrees and
the sidewalk is in the shade.