Other stories by Pieter Vanderwerf

  • Help for Your Air

    Maintaining the target for entrained air in fresh concrete is like walking on a tightrope over a canyon on a windy day. You have the goal to arrive at the other side. And you know the path you have to take. But it's a difficult task keeping all the variables in balance, and the consequences of...

  • What's Worrying Your QC Manager?

    QC managers say testing labs often fail to follow correct procedures. The burden of proof of good performance falls to the producer.