Friday, March 9, 2012

REQUIREMENTS OF BITUMINOUS MIXES

A good bituminous paving mix should exhibit stability, durability, flexibility, skid resistance, and workability properties, besides economy. 
  1. Stability is defined as resistance of the paving mix to deformation under load and thus it is a stress which causes a specified strain depending upon anticipated field condition. Stability is a function of friction cohesion.
  2. Durability is defined as the resistance of the mix against weathering and abrasive actions.
  3. Flexibility is a property of the mix that measures the level the bending strength.
  4. Skid resistance is defined as the resistance of the finished pavement against skidding and is function surface texture and bitumen content.
  5. Workability is the ease with which the mix can be laid and compacted. It is function gradation of aggregates, their shape and texture, bitumen content and its type.   

No comments:

Post a Comment