Comparisons
Vacuum Wet Press Kerbs vs Rubber/PVC Moulded Kerbs
Technical comparison covering performance, manufacturing, durability, installation and other relevant criteria for vacuum wet press kerbs vs rubber/pvc moulded kerbs.
| Criteria | WET CAST (RUBBER/PVC MOULDED) KERBS | VIBRO PRESS (STEEL MOULDED) KERBS |
|---|---|---|
|
Mfg. Process Description |
Usually completely manual process. Starts with Manual Drum Mixer being used for mixing the Concrete. Then each individual Kerb mould, made of rubber/PVC, is manually filled with wet concrete, passed over a simple vibrating table and left to cure in the mould for one day. Next day, each Kerb is removed from its mould and kept for further curing before despatch. |
Usually fully automatic production process. Starts with weigh batching of aggregates and cement for mixing, then automated filling of concrete in steel moulds on the Vacuum Wet Press with compaction under hydraulic pressure and water suction by vacuum, followed by movement to curing, packing, storage and truck loading. |
|
Physical Parameters |
Concrete Density is lower between 2100 - 2200 kg/m3 due lack of hydraulic compaction resulting in voids and lower Compressive Strength around 15N/mm2. |
Higher concrete density between 2300 – 2400 kg/m3 due to large hydraulic pressure with vacuum suction of water resulting in negligible voids and higher Compressive Strengths around 35N/mm2. |
|
Quality consistency |
Poor consistency in product, with high variation in finish, sizes, and densities/strengths due to manual production process. |
Much better consistency owing to use of fully Automatic Vacuum Wet Press for production. |
|
Production quantity |
Daily production output is limited by availability of labour, moulds and space for drying of material, weather conditions etc. and is usually limited to 100-200 pcs. per day. |
Daily production output significantly less dependent on external factors such as labour, moulds or space availability. Results in higher reliability of output, with Automated Presses capable of producing 1000 pcs. per day. |
| Looks |
Better looks initially and dark colours are obtained |
Looks very consistent over years of usage |
|
Process Reliability |
Low reliability due to manual process resulting in higher variations in dimensions, strength, and colour shades. |
Reliable process due to automation resulting in low product variation. |
| Durability | Lower durability of surface finish | Fair durability of surface finish |
