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APPENDIX — ST-45 PUMP CONCRETE 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 CaliforniaTest Lab.Report)
JOB: Building Foundations (Water Project)
Sacks per cu./yd. | 6.5 designed for 2,500 lbs. in 28 days |
Gallons per sack | 7.1 |
Washed | 1.3 |
Organic |
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Specific gravity (SSD) |
Sieve |
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Material | 1.5” | 1” | 3/4” | 3/8” | #4 | #8 | #16 | #30 | #50 | #100 | #200 |
W.C. Sand |
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| 100 | 99.7 | 79.1 | 60.4 | 36.5 | 14.3 | 4.0 | 1.1 |
Pea Gravel |
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| 100 | 3.0 |
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% Comb. |
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| 100 | 66 | 51 | 39 | 23 | 9 | 3 | 1.0 |
DESIGN FOR ONEYARD OF CONCRETE (SATURATED & SURFACE DRY):
Absolute volume of aggregate in one cu. yard: | 17.78 cu. ft. |
Specific gravity of aggregates in one cu. yard: | 2.58 |
Weight of aggregates in one cu. yard batch: 2850 lbs.
| % | BATCH | SPEC.GRAVITY | ABS.VOL. |
W.C. Sand | 65 | 1800 | 2.58 | 11.56 |
PEA GRAVEL | 35 | 1000 | 2.60 | 6.22 |
WATER 46 gal. |
| 1 |
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CEMENT 6.5 sk. |
| 611 |
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TOTAL |
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| 27.00 |
ADMIXTURE: |
| None |
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SLUMP |
| 4” |
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REMARKS |
| This mix designed for pumping |
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NOTE: |
| Due to the availability of | ||
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| this mix pumped very successfully. |
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PAGE 58 — MAYCO