tying concrete steps into existing porch

[budzinskia]

I want to pour a sidewalk and concrete steps on to my existing concrete porch. Do I drill holes into my existing porch and place rebar from the porch into the concrete steps I want to pour?

[pushkins]

You should if you don't want them settling at drastically different rates.
You will need to use chemical epoxy to hold the rebar in place.

[HayZee518]

there is also a concrete latex bonding agent you apply before the pour. it goes on milky white and dries to a purple hue.