RLW: The Mixer Minute

  Concrete 101: Thermal Cracking & Temperature Control in Large Pours Concrete gets hot as it cures — literally. The chemical reaction between cement and water (called hydration) releases heat. On small jobs, this usually isn’t a problem, but on large pours like foundations, walls, or bridge decks, that heat can cause thermal cracking if not managed properly. What is Thermal Cracking? As the concrete heats up in the middle and cools on the outside, different parts of the slab expand and contract at different rates. This stress can lead to visible cracks on the surface or even deeper inside the structure. How Contractors Control It Cooling Pipes: Circulating cold water through pipes placed in the concrete. Insulation Blankets: Keeping surfaces warm in cold weather so the temperature difference isn’t as extreme. Placement Timing: Pouring during cooler parts of the day. Mix Adjustments: Using cement types or admixtures that reduce heat buildup. Why ...

🧊 Myth Buster Monday: “You Can’t Pour Concrete in Cold Weather” Myth: When the temperature drops, concrete work has to stop. Busted: Not true! While cold weather can make things more challenging, it doesn’t shut down the job. With the right preparation, techniques, and materials, concrete can be placed and cured successfully even in winter conditions. ❄️ Why Cold Weather Matters Concrete hardens through a chemical process called hydration . This reaction slows when temperatures fall, meaning the mix takes longer to gain strength. If concrete freezes before it sets, durability and finish can be affected. That’s why winter work requires extra attention — not because it’s impossible, but because it’s science. 🔥 How Concrete Crews Handle the Chill Experienced crews follow specific cold-weather guidelines to keep concrete strong and protected: Warm Mix Materials: Heated water or aggregates help maintain the proper curing temperature from the start. Accelerating Admixtures: Chemic...

  Sunday Slab Talk: Concrete vs. Asphalt — The Never-Ending Debate It’s one of the oldest arguments in construction: concrete vs. asphalt. Both materials pave our roads, driveways, and parking lots, but they each have their own strengths and quirks. Concrete Durability: Lasts 30–40 years or more with proper care. Maintenance: Needs fewer repairs, though cracks can be more noticeable. Appearance: Can be colored, stamped, or finished for a custom look. Cost: More expensive upfront, but often cheaper in the long run. Asphalt Durability: Lasts 15–20 years on average. Maintenance: Easier and cheaper to patch or resurface. Appearance: Dark color hides stains but offers fewer design options. Cost: Lower upfront cost, making it attractive for large projects. Why the Debate Never Ends Contractors, homeowners, and even municipalities have strong opinions about which is “better.” The truth? It depends. If you want a long-lasting, low-maintenance surfa...

  Concrete 101: Repair & Restoration Methods Even the toughest concrete can face problems over time. Cracks, chips, and surface wear are common — but the good news is, there are ways to bring concrete back to life without always tearing it out. Common Repair Methods Epoxy Injection: A liquid resin is injected into cracks to restore strength and prevent further damage. Overlays: A thin new layer of concrete or special resurfacer is placed on top of old slabs to give them a fresh look. Patching: Quick fixes using repair mortar to fill small holes, chips, or spalls. Grinding & Polishing: Smoothing out rough or uneven surfaces for safety or aesthetics. When is Restoration the Best Choice? When damage is only surface deep. When cracks are small and not structural. When a full replacement would be too costly or disruptive. Why It Matters Repairs extend the life of concrete, improve safety, and make surfaces look new again. With the right method, ...