For Home Depot purchase info:  Concrete & Mortar

Concrete should have fiber mixed in, regardless of if there is rebar in the pour. 

For concrete patches in slabs, rebar should be drilled and epoxied into the slab to help support the patch pour.

The concrete should be level.  This is especially true for new pours.  The only exception is the slight grade that the concrete needs to divert water from the house.

When pouring concrete, always have a joint expander placed next to the item you are pouring against.  Without this, the concrete will crack when the next winter comes. 

Concrete should have a brushed finish.

Any contractor that pours concrete and uses a truck should have all excavation and forms layers BEFORE the concrete truck is called.

The concrete contractor is also responsible for removing concrete forms and cleaning spillage, demolition debris, and any other cleanup associated with the concrete job.

CONCRETE CALCULATOR: https://www.calculator.net/...p;slabcal=Calculate

All concrete needs to be adequately vibrated so that air bubbles are removed. The improper vibration of concrete will lead mortar to leak through the frameworks and leaves the aggregates to settle down, this will cause "honeycombs" in concrete.

 Honeycombs are hollow spaces and cavities left in concrete mass on the surface or inside the concrete mass where concrete could not reach. These look like honey bee nests. The surface looks very rough with voids and gaps between concrete and the reinforcement