Archive for December, 2011

Post-production Phase of Transportation

December 19th, 2011

Consists of the handling, storage, accumulation (stacking), shipping (transport and installation phase) in the field (site erection)

Things to consider in the transport system are:

  • Transport equipment specifications: width, height, max load, the dimensions of the elements
  • Route transport: distance, road width, traffic density, the free space under the bridge, permission from the competent authority.

The selection of a conveyance by the following considerations:

  • Various components: a linear or plate
  • Height of lifting equipment: associated with the height of buildings to be constructed
  • Weight of components: based on the maximum load
  • Local conditions: the achievement of the location and topography

According to the place of manufacture, precast concrete divided by 2, namely:

  1. Casted in a place called Cast in Situ
  2. Casted in the plant

According to the treatment of steel, divided by 2, namely:

  1. Ordinary precast concrete
  2. Precast prestressed concrete

There are two different principles in prestressed concrete;

  1. Pre-tensioned Prestressed Concrete
  2. Post-tensioned Prestressed Concrete

Making Precast Concrete

December 2nd, 2011

The process of production / manufacturing of precast concrete can be divided into three sequential stages, namely:

Design phase

The planning process of a product is generally a combination of sharpness to see opportunities, technical skills, marketing ability. The main requirement is a structure must meet the requirements of strength, stiffness and stability on the maid.

Production stage

Some of the items of work to be monitored at the production stage:

  • Completion of work orders and product images
  • The quality of raw materials
  • Quality of prints
  • The quality or strength of concrete
  • Placement and compaction of concrete
  • The size of the product
  • Position mounting
  • Maintenance of concrete
  • The transfer, storage and transport products
  • Recording (record keeping)

Production stage consists of:

  1. Preparation
  2. Fabrication of reinforcement and the mold
  3. Dosing and mixing of concrete
  4. Pouring and casting concrete
  5. Transportation of fresh concrete
  6. Compaction of concrete
  7. Finishing / repairing concrete
  8. Curing Concrete