More stories about Q&A

  • It's About Time

    We are constantly battling time constrains on ready-mix deliveries and need help extending the time limits on some projects. We can maintain slump with water reducers easily beyond the 60 or 90 minutes allowed in the specifications. What advice can you offer?

  • Your Concrete's Air Content

  • Out of Plumb Precast Panels

  • Quality's Costs

    Q: I'm a quality control manager for a mid-size ready-mix producer and am dealing with several quality issues which need resolution. I am having difficulties convincing the owner that he needs to increase funding for the quality system in order to produce more consistent concrete. How can I...

  • Working With Your Lab

    Q: We are experiencing low compressive strength test results on some concrete we supplied to a job. We know it is due to poor testing of the cylinders. How do we convince the contractor and engineer where the issue is?

  • Testing for Air in Concrete

    We retrieved a piece of the material and an air-void analysis showed that the air content met the project spec. What happened?

  • Is Your Aggregate Alkali-Silica Reactive?

    Q: We received a request to submit proof that our aggregates are not alkali-silica reactive. We've never seen this type of request before in our area. They required ASTM C1260 testing, which we completed and failed. What do we do now?

  • Tread Lightly When Going Green

    Q: We operate in an area that does not have many LEED projects. However, we are now seeing more such projects under development, and specifications requiring LEED submittals are becoming more frequent. How can we manufacture concrete to meet these requirements, and how can we make our concrete more...

  • Making a Quality Hire

    Q: We are a small but growing ready-mix producer. We have just decided to open a portable plant to service a multiyear project. We are considering hiring a full-time quality control manager. At what annual production volume does it make sense to make this hire?

  • Lightweight Block As An Alternative

    Q: We are working on a project where the owner is trying to earn LEED credits. So we are trying to convince the structural engineer to use lightweight block. How can we get him to use lightweight block as an alternative?