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Comparison
Extruder / Slip Former
Extruder |
Slip former |
 |
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Extruder: |
Slip Former: |
Machine Design: |
compaction by pressing
and vibrating the concrete by means of augers
1 concrete feeding and compaction stage. |
casting in several
layers:
compaction by external vibrators
1, 2 or 3 concrete feed and compaction stages |
Product |
only hollow core
slabs
up to 40 cm high
(void percentage up to 50 %) |
hollow core slabs
up to 40 cm high,
(void percentage up to 40 %)
solid slabs,
T- or I-beams,
solid or covered lintels,
posts and piles,
ribbed slabs,
V-shaped units,
etc. |
Production Speed: |
0,8 - 1,6 m/min
dep. on the height of the slab |
1,0 - 2,8 m/min
dep. on type and height of the unit |
Operators: |
0-1 controller |
1-2 workers |
Concrete Quality: |
B65 - B90
650 - 900 kg/cm2 |
B45 - B55
450 - 550 kg/cm2 |
Concrete Mix: |
sand: 0 - 4 mm
gravel: 4 - 10 (15) mm
cement: 320 - 350 kg/m3
water: 115 - 120 l/m3
w/c-Ratio: 0,32 - 0,35 |
sand: 0 - 4 mm
gravel: 4 - 10 (15) mm
cement: 340 - 380 kg/m3
water: 135 - 140 l/m3
w/c-Ratio: 0,38 - 0,40 |
Production Costs: |
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Consumption of
Cement: |
HCS 16: 27,2 kg/m2
HCS 20: 34,0 kg/m2
HCS 30: 51,0 kg/m2
HCS 40: 68,0 kg/m2 |
HCS 16: 34,5 kg/m2
HCS 20: 43,2 kg/m2
HCS 30: 64,8 kg/m2
HCS 40: 82,0 kg/m2 |
Labour Costs: |
0,84 min./m2
HCS |
2,88 min./m2
HCS |
Wear and Tear
Costs: |
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Material: |
screws, moulds, ...
aprox. 0,5 US$/m2 |
tubes, moulds, vibration
feet, ...
aprox. 0,2 US$/m2 |
Labour Costs: |
0,024 min./m2 |
0,048 min./m2 |
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