Comparison Extruder / Slip Former

Extruder

Slip former

 

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:

   

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:

   

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