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Volumetric Concrete Dispenser Design Worksheet
OWNER Mobil Crete Technologies Unit Serial # N91-85R
YOUR MIX DESIGN (This sheet must be filled out for each mix design)
MIX DESIGN 3000 psi PM Date 11/5/2015
(max 8 characters)
Materials of one cubic yard:
Cement 600 LBS. 100% Cement Discharge Speed 102 Counts per Bag of Cement
( In Percent)
Cement 6.4 BAGS 1.61 Cubic Yard Discharge Time (Minute)
Aggregate
Pounds of
Aggregate
Name
# Desired Aggregate Name
Aggregate
(enter 1. 2, 3, or 4)
1
Pea Rock
Aggregate 1 1 Pea Rock
950
2
Ortona Sand
Aggregate 2 2 Ortona Sand
1903
3
Rock #67
4
0
Color OUNCES
Low, Mid,
or High Sys Dilution O7Jbag
Admix # 1
Admix # 2
Admix # 3 1 1
(Mid Range available on 130, 150, & 200 Series units only)
1. Determine the count per cubic yard.
Fiber Chopper Pounds per Yard
6.4 bags/cubic yard x 102 counts per bag = 649 count per cubic yard.
2. AGGREGATE 1: Divide the lbs. of fine aggregate per cubic yard by the count per cubic yard.
950 lbs. fine aggregate divided by 649 counts per cu. yd.= 1.46 lbs. per count.
GATE SETTING (from graph) 3.1
3. AGGREGATE 2: Divide the lbs. of coarse aggregate per cubic yard by the count per cubic yard.
1903 lbs. coarse aggregate divided by 649 counts per cu. yd = 2.93 lbs. per count.
GATE SETTING (from graph) 5.7
Description 3000 psi PM
Total
649 Counts l Cubic Yard
Cement
0.93 lbs./ Count
Dial
Aggregate 1
1.46 Ibs.l Count
Setting
Oz1Min
Aggregate 2
2.93 lbs./ Count
Admix # 1
ERROR
0.0
_
"Water '
0.87 lbs./ Count
Adrnix # 2
ERROR
Aggregate 1 Gate
3.1
Admix # 3
ERROR
--0.0
0.0
Aggregate 2 Gate
5.7
Color
#DIWGI
0.0
Water Meter
42
Fiber Chopper_
#DIWOI
_ ^ 0.0
At this point we recommend that you run a 114 yard yield test. You must have a box that is 1/4 cubic yard.
You can build one with internal dimensions of 36" x 36' x 9". You start the unit producing concrete. Stop
both the conveyor and mixer at the same instant. Set the 1/4 cubic yard yield box under the discharge.
Start the mixer and conveyor at the same time. Run the unit to the amount indicated
for 1/4 cubic yard (1/4th of the meter count per cubic yard from step 1). Shut off the mixer and conveyor at the
same instant. The box should be full. It may be necessary to adjust the aggregate gates slightly to adjust
the yield.
1 M Yard Count 162
• If you have a water recording meter your lbs./Count will be approximately 1.0425.
SRM 08-10