More stories about Testing

  • ACI Physical Testing of Cement Training Video

    ACI has developed the ACI Physical Testing of Cement Training Video as a resource for new testers and a refresher for experienced testers. The video is presented in chapters based on test methods so each one can be reviewed individually. The following tests are included: ASTM C109 – Compressive...

  • Should Superplaticizers be added at the Plant or the Jobsite?

    Adding water reducers, including superplasticizers, at the ready-mix plant doesn't limit the ability to measure and control slump. What factors determine where they are added?

  • Adding Water to Concrete

    Adding water to a load of concrete may or may not be acceptable, depending on the parameters that must be met

  • Aggregate Moisture in Concrete

    The moisture condition of aggregate in concrete is very important. The absorption of the aggregate indicates the quantity of water which will be absorbed into the pore structure.

  • When Bad Testing Happens to Good People

    Apparently the topic of cylinder testing gone wrong struck a chord with TCP readers, who wrote back to share stories similar to the one in last month’s blog. Following are just two humorous examples.

  • Preventing Slump Loss

    Many things can cause rapid slump loss. Aggregate, cement chemistry, fly ash sources, and admixtures are culprits.

  • Profiting from Quality Concrete

    There is a widely held and incorrect belief in the concrete industry that a producer's quality control (QC) department takes away from and does not add to the bottom line.

  • Bubble Trouble

    Everyone in the concrete industry has received the dreaded call about low strength on a job. Typically, high water content, high air content, or low standards from the testing company is the primary cause of the problem.

  • 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...

  • ASTM International Launches Supplier's Declaration of Conformity

    Program Houses Registry of Product Conformity to Standard Test Methods