Expert: Lee Kilcup - 10/13/2008

Question
Can i ask you if how many days can a 1 hectare land be concreted with how many men? thank you in advance for your kind response.

Answer
There are many variables:
Is the slab on grade or suspended?
What type of finish is there? Hard trowel, broom or float?
How is the slab being placed? Pump, crane, buggies?
How thick is the slab?
What are the weather conditions?
What is the nature of the concrete?
How fast can the batch plant supply the concrete?
In a "normal situation" we place 15-20,000 sf elevated slabs with a crew of 20 plus people. An acre is 43,520 sf. 5 or 6 of the people are placing and the balance are screeding and finishing. The finish would be hard trowel and the concrete is generally delivered at a rate exceeding 125 cy per hour. The mix would be a 6000 psi mix.