Search Results for: cleaning mortar

Introduction Delamination is the surface layer of concrete peeling or separating from the underlying concrete, creating a patchy, hollow feel. It often shows up as a dull patch that may flake or sound hollow when tapped. Lightly tapping suspect areas can help you spot where the top lift isn’t bonded well. To diagnose, look for […]

Introduction Bugholes on formed concrete are small air cavities that mar the surface after form removal. They happen from trapped air, sticky release agents, or improper vibration. In DIY work, you can reduce them by adjusting how you vibrate, how you release the form, and how you mix your concrete. Use the right vibration technique

Introduction Air entrained concrete is concrete that includes tiny air bubbles introduced by a special additive to improve its performance. These micro-bubbles help when water freezes and expands, reducing cracks in the slab. It’s a common choice for projects that sit outside or face temperature swings. Use is appropriate when you want a smoother surface

Introduction Bleed water is the surface water that rises through the concrete mix as it sets. Finishing timing means waiting for that water to emerge and begin to dry before you apply final troweling or brooming. Doing it too soon can trap moisture and lead to dusting, blisters, or flaking later. The bleeding rate depends

Introduction Bond failure happens when a concrete patch peels because the new mix won’t adhere to the old surface. It means the patch didn’t bond well to the substrate due to contamination, moisture, or a weak surface. Fixing it starts with identifying the rough spots and cleaning up before rework. To redo it correctly, start

Introduction Concrete patch lines are blended repairs that look like part of the surrounding slab rather than obvious patches. The goal is a seamless join that doesn’t stand out when people walk on or near it. You’ll use careful technique and matching materials to hide the repair. Focus on patch techniques that blend edges with

Introduction Pinhole defects are tiny air-filled holes that show up in epoxy coatings on porous concrete. They happen when moisture, dust, or a lack of proper surface preparation causes the epoxy to seal in voids. Proper priming helps the surface accept the epoxy evenly and reduces pinholes as it cures. To start, clean and dry

Introduction Microtopping problems are defects like bubbles, pinholes, and delamination that happen when a thin decorative concrete layer can’t bond or level properly. This article covers straightforward, hands-on steps to prevent them during mixing, prep, and application. You’ll also see how surface preparation and choosing self-leveling options can help you get a smoother, longer-lasting finish.

Introduction Bonding agents are products that help new concrete stick to old surfaces. They improve adhesion when the surface is clean, sound, and properly prepared. If you skip cleaning or misapply them, they can weaken the repair. Before choosing a method, decide whether you should repair or replace based on damage and load. Focus on