Overview
AMITTARI cement Rebound Hammer model AL-150N, in line with JGJ/T23-2001 technical regulations, used to detect concrete compressire strength in the range of 20-60Mpa. The system standard energy is 2.207J, the indication system is pointer direct reading medium, and the implementation of GB9138-88 and JJG817-1993 National Measurement verification standards is supervised by the Chinese Academy of Building Sciences.
Features
1. The center guide rod adopts imported materials, with high accuracy and abrasion resistance.
2. The shell is made of superhard aluminum to avoid damage to the instrument during on-site operations and prolong its service life.
3. The pointer slider adopts an external spring ring structure, which not only facilitates friction adjustment, but also ensures uniform friction between the pointer shaft and the pointer slider, ensuring the accuracy of the instrument.
Principle
Cement Rebound Hammer uses the standard energy 2.207J to act on the concrete surface through the impact hammer, and reads the data on the pointer direct reading indication system according to the rebound value to evaluate the concrete compressire strength.
Applications
Strength testing of general building components, bridges, and various structural components (slabs, beams, columns, bridges)
Standards
JGJ/T23-2001、GB9138-88、JJG817-1993
Steps
1. Adjust the take-off position of the hammer to the scale "0".
2. Align the spherical radius of the end of the bounce rod with the concrete surface to be measured.
3. Carry out the bouncing operation to ensure that the unhooking position of the bouncing hammer is at the "100" mark of the scale line.
4. Read the pointer indication and evaluate the concrete compressire strength according to the standard.
Notice
• Check whether the friction of the pointer is within the range of 0.5 to 0.8 N before use.
• Ensure that the working length of the spring is 61.5 +/- 0.3 mm and the stiffness is 7.85 +/- 0.40 N/cm.
Periodically calibrate the steel anvil to 80 +/- 2.
• Avoid damage to the instrument during on-site operations to prolong its service life.
