It's been a week since the concrete slab went down and at the moment I'm deeply concerned about the structual integrity of the slab. There are heaps of honeycomb spots around the slab which is due to the lazy concreters not using a vibration machine to compact the slab when it was poured. The engineer's plan advise that the 'concrete shall be vibrated' it looks like they didn't adhere to the instruction. In addition, I saw one of the concreter pour water in the concrete mixing truck when it arrived (to get the slump higher so it is easier to work with) which I believe is wrong as it dilute the concrete:water mix ratio. I had a site meeting with the site supervisor about the honeycomb and he said that this is normal, (yes other slabs do have some honeycombing but not to this extent). There's a hollow gap at the rear of the slab which I pointed out to the SS to take a look, and to my horror we noticed that a bit of the reo is exposed. I was praying for this not to happen but it did and now I'm at a lost. SS said he will get it fixed so hopefully it will be done correctly. Overall, it looks like they use the cheapest concreter they could find. Pray that there are no more horrors like this later on.
Honeycombing to the footing for the front column pier at front of house. It looks like the bottom bit was poured first then the top hence why it doesn't look uniform.
Cracks below the rebate where bedroom 2 and 3 are. This is probably due to no compacting when concrete was poured.
The hollow gap at rear of house, found out that the reo is exposed and need to be fixed otherwise the reo will continue to rust and could cause concrete cancer (not good). 
Honeycomb at side of alfresco, there are heaps of this around the slab. This is probably caused by bad compacting during the concrete pour.
Close up of the honeycomb at alfresco area. 
Honeycomb at alfresco area (there's heaps more of this around the slab!!!) 
A wider view of the honeycomb around the alfresco area. 
And this is only the beginning of the build. Pray that the horrors will end here please.Oh well the only things I can do at the moment is document all this and if any structural failure occurs later on at least I got evidence to prove what was done wrong.
Update: The backfilling of dirt to the perimeter of house was done this afternoon. There are bobcat tyre marks all around the slab indicating the driver used the slab as a work platform for backfilling. There are few chips and dents on the slab but nothing major however the slab is now very dirty.
Backfilling to front of house.
Backfilling to alfresco area with the bobcat tyre marks on the slab (biggest donut ever) 
Backfilling to rear of house.
