<p>Tunnels lined with concrete formed on site are subject to ageing and developments that may endanger their stability, functions, safety and the required level of service. A certain number of defects are inevitably noted during or after tunnel construction. ...

The concept of "high performance" for drilled shaft concrete is that the mixture should address the most critical performance requirements related to workability. This paper describes the important considerations in concrete mixture design for drilled shaft ...

Roller-compacted concrete (RCC) is an accepted and economical method<br>for the construction of dams and pavements. Achieving adequate compaction is essential in the development of the desired properties in the hardened material. The compaction depends on ...