Alternative Concrete for Dams

February 13, 2012
Posted by
Category Civil Engineering
Share This

Grout Enriched roller compacted concrete is gaining acceptance in the United States to produce an economical, low-permeability upstream facing for dams.Roller compacted concrete 

(RCC) is frequently used for the construction of mid-sized to large mass concrete applications, including dams, because of its faster placement rate, lower heat of hydration, and reduced cost compared with conventional concrete. RCC is a no-slump concrete that is typically spread in lifts as thick as 12 inches with earthmoving equipment and compacted with a smooth vibratory roller. Early experience on RCC dam applications in the 1980s showed a tendency for seepage to develop along the 1-foot-thick lift lines due to the tendency at the time to use a lean RCC mix. Therefore, many RCC dam designers started including an upstream facing system as a watertight barrier in combination with careful attention to lift joint preparation and treatment. The upstream barrier is typically constructed of a zone of conventional concrete, an exposed liner system, or precast concrete panels with or without a liner syste

Read the full story here.


  • Leave Your Comment

    Your Comments: (please keep it clean!)