Casey Concrete can produce a wide variety of strengths and styles of Ready-mix concrete to meet the demads of your specific job.   Concrete is generally sold by its compressive strength after curing.   The most common strengths are as follows:   3000 PSI or 20 MPA 3500 PSI or 25 MPA 4000 PSI or 28 MPA 4500 PSI or 30 MPA 5000 PSI or 35 MPA   Concrete can be order by the cubic yard or meter.