Digital Rebound Concrete Hammer

How to Use a Manual Rebound Hammer: 1. Select Test Area: Pick a clean, smooth, and dry concrete surface free of dust, paint, or loose particles. 2. Position the Hammer: Hold the hammer firmly perpendicular to the surface. 3. Trigger the Impact: Press the plunger until the spring releases and strikes the concrete. 4. Read the Rebound Value: Note the reading shown on the scale immediately. 5. Take Multiple Readings: Perform 8–10 tests in the area, discard outliers, and calculate the average. 6. Interpret the Results: Compare the average rebound number with the manufacturer’s conversion chart to estimate concrete compressive strength. 7. Document findings.