More stories about Slab

  • Modern Moisture Testing

    Changes have occurred in testing floor dryness.

  • Decorative Slab Core Samples

    We are involved in a dispute on the quality of a decorative slab for which we supplied concrete last fall. The project appears to be fine, but one set of test cylinders failed to meet compressive strength requirements.

  • Ten More Influencers

    Ten more noteworthy influencers who have a significant impact on our industry.

  • Selling Fibers on Performance

    A little more than a year ago, ASTM International Committee C09 on Concrete and Concrete Aggregates approved a new standard to help increase the use of fibers in concrete construction. The standard facilitates post-crack performance measurement for fiber-reinforced concrete for slabs-on-grade...

  • Paving the Way

    Precast-prestressed concrete producers long ago proved our product as a method for providing durable high-performance structural elements for bridges and commercial buildings. In recent years, however, some of these producers have found a new market segment for their product: pavement construction.

  • The U-factor for Concrete Slabs

    A contractor we supply asked for help in meeting the new energy code requirements for a residential project.

  • Is it the Slab's Fault?

    A flooring contractor has experienced problems on four occasions over the years with his two-part polyurethane floor covering not bonding to our concrete slab-on-grade. He has said that the acid-etch process prior to installing the covering did not react very well with our slab surface, based on...

  • Stalking "The Silent Killer"

  • Calcium Chloride and Metallic Color Hardeners Don't Mix

    A customer recently divided the placement of a large slab-on-grade warehouse floor into 2 pour days. The plans required the contractor to apply a metallic-aggregate dry-shake hardener. For each pour, a standard 3500-psi concrete mix, without air, was pre-ordered. But on the second day, the crew was...

  • Condition of Concrete at and Below Driveway Surface Often Differs

    This time of year always brings numerous complaints about driveway wearing surfaces. Conditions that mar a driveway's beauty-and are the homeowner's most common complaint-are popouts and exposed rocks at the slab's surface. More precisely, crushed limestone aggregate is exposed after the medium...