Deferent parts motorways is in direct contact with the wheels of the work load should have to meet
requirements such as:
- Ensure the intensity.
- Less wear, flat Dexe run smoothly, without causing shock .
- quick water drainage.
- light Weight to reduce static load itself.
There are 3 deferent categories:
4.1.1.1. Asphalt concrete bridge deck:
Advantages, disadvantages and scope of application:
- Asphalt concrete deck waterproofing capable of good, quick.
- Creates pavement for cars running smoothly, limited transmission power shock down the
concrete bridge deck and chetieng noise limits.
- Rehon cost of cement concrete bridge deck.
- life expectancy is about 10 ÷ 20-year low and fast worn thereby increasing the cost of O &
M.
- now spheres asphalt concrete is being applied disseminated 4.1.1.2. Cement concrete bridge deck: Advantages, disadvantages and scope of application: - cement concrete deck has a lifespan of 50 ÷ 60 years (higher sphere concrete Asphalt) and less corrosive thereby reducing maintenance costs maintenance. - with cement concrete deck capable of waterproofing. - Pavement not run smoothly for the car, causing the shock force and loud noise when the car ran over the bridge. - the cost of the more expensive concrete bridge deck Asphalt. - Currently in cement concrete bridge deck is rarely used. 4.1.1.3. Steel sphere: In steel demand, to reduce static load may sphere spheres steel structure. ¾ Pros, cons: - Structural participation sphere this type of beam bearing the same owner as a sub-component of the beam Home . - no need for water prevention layer composed of steel plates used in the bridge's steel stainless. - type this sphere meet user requirements such as flatness, roughness, and the time is not necessary to wastewater facilities. - bridge direct the direction of lighter weight themselves so it is especially suitable for long span when the ratio of dead load and torque due to large loads. - the cost of this type of demand is higher than with other types of other spheres. - Structural the user can directly apply to the deck or for all beams in the case of box girder.
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