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1. Based on the following test data and batch ticketinformation,

(1) calculate the concrete density andyield

(2) determine whether it is underyielding or over yielding

(3) make a sand (s.g.=2.63) adjustmentif under yielding

(this problem requires some criticalthinking since it is a bit more complicated than the example inlecture note 13)

Test data:

Weight of the bucket with concrete:           44.72 lbs

Weight of thebucket:                                   7.98 lbs

Volume of thebucket:                                  0.249 cubic feet

Material batched:

Sand:                                                            10,010 lbs

¾”Rock:                                                       12,000 lbs

Cement:                                                       3,530 lbs

Fly Ash:                                                       600 lbs

Air:                                                               5%

Water:                                                          124 gallons

Quantity ordered:                                          7 cubic yards

(however, yield should be check withone cubic yard)

The mix was designed as 27.1 cubicfeet per cubic yard.