Multiquip Mayco Structural Concrete Pump ST-45HRM CE User Manual
Page 64
PAGE 64 — MAYCO ST-45HRM CE PUMP — OPERATION & PARTS MANUAL — REV. #0 (02/23/04)
APPENDIX — ST-45HRM CE CONCRETE PUMPCONCRETE MIX
INFORMATION
The following information has been extracted from actual testing laboratory reports. The purpose of this printing is only to help create
a better understanding of the importance of uniform gradation and proportioning of materials which affect pumpability of concrete
mixes. These weights and proportions illustrate that when the sieve analysis is ideal, the sand/rock ratio can be adjusted (65% sand
35% rock) and pumpability should be excellent.
EXAMPLE #1 (A California Test Lab. Report)
JOB: Building Foundations (Water Project)
Sacks per cu./yd.
6.5 designed for 2,500 lbs. in 28 days
Sacks per cu./meter.
8.5 designed for 1,134 kg. in 28 days
Liters/Gallons per sack
26.9/7.1
Washed Sand-#200 wash
1.3
Organic matter-OK
Specific gravity (SSD)
Sand-2.58; Pea Gravel-2.60
Sieve analysis-percent passing
Material
1.5”
1”
3/4”
3/8”
#4
#8
#16
#30
#50
#100
#200
W.C. Sand
100
99.7
79.1
60.4
36.5
14.3
4.0
1.1
Pea Gravel
100
3.0
% Comb.
100
66
51
39
23
9
3
1.0
3.81 cm =1.5 in.
2.54 cm = 1.0 in.
1.90 cm = 0.75 in.
.952 cm = 0.375
DESIGN FOR ONE YARD OF CONCRETE (SATURATED & SURFACE DRY):
Absolute volume of aggregate in one cu. yard:
503 liters (17.78 cu. ft.)
Specific gravity of aggregates in one cu. yard:
2.58
Weight of aggregates in one cu. yard batch: 1,293 kg. (2,850 lbs.)
%
BATCH
SPEC. GRAVITY
ABS. VOL.
W.C. Sand
65
1800
2.58
327 liters (11.56 cu. ft)
PEA GRAVEL
35
1000
2.60
176 liters (6.22 cu ft.)
WATER 174 liters/46 gal.
1
CEMENT 6.5 Sack/cu yd
611
CEMENT 8.5 Sack/cu meter
611
TOTAL
27.00
ADMIXTURE:
None
SLUMP
10.2 cm (4-inches)
REMARKS
This mix designed for pumping
NOTE:
Due to the availability of well-graded sand as shown in the above sieve analysis,
this mix pumped very successfully.