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Problem Clinic & Troubleshooting

  • Workers apply polyurea to the surface of a parking deck. There is a lot to consider before and during the application.

    Applying Polyurea Coatings

    Surface preparation is 80% of the job.

     
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    Craze Cracks

    These fine, random cracks on the surface of concrete are just aesthetic, not structural.

     
  • Although different, water- and solvent-based sealers both result in a sealed concrete surface.

    Water- Versus Solvent-Based Sealers

    Knowing the differences between various sealers will help you determine which one is right for your job.

     
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    Selecting and Using Bond Coats

    Using the wrong bond coat is a major reason for failing to join two concrete surfaces.

     
  • Concrete sealers enhance a floor and protect it from moisture, abrasions, and other defects.

    Finding the Right Sealer for the Job

    No single concrete sealer is appropriate for all projects. They are chemically different and are designed for different purposes.

     
  • Blistering on tilt-up surfaces shortly after it rains is likely caused by not removing the mold release agents and bond breakers used for casting the concrete component.

    Coating Tilt-Up Concrete Walls

    Procedures for coating concrete surfaces are different from other surfaces, and tilt-up surfaces require special preparation.

     
  •  At left, an unmodified patch is easily dislodged due to a lack of hydration during curing and lack of adhesion. At right, a modified patch at 10% polymer (percent polymer by weight to cement) would not budge.

    Polymer-modified Mortars

    It helps to understand some of the basics about why polymers are added to cement formulations.

     
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    Proper Prep Before Work Starts

    I'm relatively new to the concrete polishing business. My company has been involved in treating stone and tile floors for years, and recently began to polish more concrete surfaces. Recently, we were asked to bid on a project that featured a concrete floo

     
  • Moisture Problems with Concrete Slabs

    Why does it seem that moisture-related flooring problems are more common today than in the past?

     
  • Decorative Problem Clinic

    Stamped concrete and pool popouts are the topic of this month's problem clinic.

     
  • Clear Water Repellent Treatments for Concrete Masonry

    We are considering bidding a project that would involve applying a clear water repellent on a recently constructed concrete block building. How should we approach the selection process for the proper material?

     
 
 

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