EVA Material Highway Protective Traffic Safety Rotary Barrel Roller
Barrier
The shape of this roller barrier is similar to a road divider which
is composed of two elongated steel plates. However, in this roller
barrier there is a tube between the two plates and it is supported
by steel poles on each tube. The tubes on the yellow roller barrier
are equipped with reflectors, making it easier for drivers to see
them at night. The tube is made from Ethylene-Vinyl Acetate (EVA)
polymer which is light and elastic so it is not easily damaged. EVA
is more flexible and elastic compared to other polyethylene resins.
In addition, EVA has a smaller mass density than rubber. Even
though the tube is quite light, the mass of the roller barrier
reaches 85-100 kilograms per meter when it is assembled with the
other parts.
The way this roller barrier works is by converting impact energy
into rotational energy. This can be proven when a vehicle hits a
roller barrier, the tube will rotate and push the vehicle back to
its lane and prevent it from moving to another lane. The vehicle's
tires can adjust to the vehicle frame because the rotation of the
tube does not change the direction of the vehicle's speed. This can
minimize the possibility of the steering system losing its function
and a series of collisions occurring. The potential for vehicles to
penetrate road barriers is smaller than road barriers that only
consist of steel plates.
Another advantage of installing a roller barrier is that the damage
that occurs to the roller barrier due to a collision is only
experienced by the part that is hit. This is because the tubes are
individual, so only the damaged part needs to be replaced and it
doesn't cost too much.
Installing a roller barrier is a little more complicated than the
guardrail that is often found in Indonesia because the tubes are
installed every 70 cm. The high cost of this roller barrier means
that its installation is only carried out in areas that are prone
to accidents, such as sharp corners that often or have the
potential to cause many victims.
Applications:
This product can be widely used in the curve sections of highway.
the ramps of highway and continuous downhill sections.
Fan-shaped middle section of curved belt
Cliff or high drop slope section
Bridge terminals
area affected by crosswind
Tunnel entrance
And road sections where accidents occur frequently.
Advantages:
Low cost
High flexibility to install and repair
Cable tension and post space can be adjusted.
Prevent vehicles from running off the road effectively
Absorb most sudden impact energy during collision
Good looking for the usage in open scenic spots
Anti-rust, anti-corrosion and anti-aging
Reflective strips can be pasted on the rotating barrel to warn
drivers at night. When the driver drives to an area without lights
or the lights are too dark, the reflective strip can refract the
light, thereby reminding the driver to drive safely.
Technical Parameters:
| No. | Name | Specifications(mm) | Material |
| 1 | Roller | 345*490/350*510(Customized) | Polyurethane |
| 2 | Post | 140*2000*4.5(Customized) | Q235 |
| 3 | PVC Tube | 160*500*6.5(Customized) | PVC |
| 4 | Beam | 100*80*4.0 | Q235 |
| 5 | Rolling Circle | 182×145×6.0 | Polymer Ethylene |
| 6 | End Socket | 1300×230×4.0 | Q235 |
| 7 | Post Cap | 145×145 | Rubber |
| 8 | Bolt | M18*120 | Q235 |
| M18*180 | Q235 |
| M18*80 | Q235 |
| 9 | Nut | M20 | Q235 |
| Item | Specifications |
| Apparent Density (KG/m³) | ≥125 |
| Tensile Strength(MPa) | ≥1.15 |
| Elongation(%) | ≥320 |
| Compression Permanent Distortion (%) | ≥38 |
| Resilience(%) | ≥72 |
| Chemical Composition |
| C | Si | P | S | Mn | Ni | Cu | Cr | B | V | Mo | W | Al | Co | Pb | Se | Te | Bi |
| 0.18% | 0.001% | 0.022% | 0.013% | 0.38% | 0.002% | 0.001% | 0.002% | 0 | 0 | 0.001% | 0.001% | 0.002% | 0.001% | 0.001% | 0.001% | 0.02% | 0.03% |
