Answer :
for an 8" thick concrete slab, you could use a coarse aggregate with a standard size number of either #57 or #67 per ASTM D448.
The largest coarse aggregate you can use in a concrete mix for an 8" thick slab is typically 1 inch or 1 1/2 inches. The size of the aggregate is determined based on factors such as the thickness of the slab and the desired strength of the concrete.
Using a larger aggregate size can help improve the workability of the concrete mix, but it may also decrease the strength of the concrete. On the other hand, using a smaller aggregate size can increase the strength, but it may reduce the workability.
ASTM D448 provides standard size numbers for coarse aggregates, and for this scenario, the suitable standard size number would be either #57 or #67. These numbers represent specific aggregate sizes that meet the requirements for concrete construction.
To know more about concrete visit:
brainly.com/question/31719042
#SPJ11