How do you calculate rebound hammer results?
How do you calculate rebound hammer results?
1) The rebound hammer is tested against the anvil made of steel having a Brinell hardness of about 5000 N/mm2….Rebound Hammer Test Procedure.
| Sr. No. | Applications | Approximate Impact Energy for Rebound Hammer in Nm |
|---|---|---|
| 1. | For Normal Weight Concrete | 2.25 |
| 2. | For small and impact-resistant concrete parts | 0.75 |
How does the rebound hammer test work?
The rebound hammer is a nondestructive testing apparatus, whereby the rebound of the spring driven mass is measured after its impact with concrete surface. As the hammer body is pushed towards the concrete, the force of the causes the latch to release, and make an impact on the concrete.
How do you calibrate a rebound hammer?
The cap has an adjustment screw and nut, which are used to calibrate the Rebound Hammer. 2. Using a 10 mm wrench, loosen the adjustment nut away from the cap. If the Rebound Hammer is reading low, tighten the adjustment screw (clockwise) into the cap.
How do you find the compressive strength of a rebound hammer?
Compressive strength (N/mm2) = Maximum crushing load / Cross – sectional area of specimen. Schmidt Rebound Hammer test is a non- destructive test.
Which quality of concrete is tested by rebound hammer test?
compressive strength
The rebound hammer method provides a convenient and rapid indication of the compressive strength of concrete by means of establishing a suitable correlation between the rebound index and the compressive strength of concrete.
Is code for rebound hammer test?
13311
Objective of Rebound Hammer Test As per the Indian code IS: 13311(2)-1992, the rebound hammer test have the following objectives: To determine the compressive strength of the concrete by relating the rebound index and the compressive strength. To assess the uniformity of the concrete.
Is code of rebound hammer test?
Objective of Rebound Hammer Test As per the Indian code IS: 13311(2)-1992, the rebound hammer test have the following objectives: To determine the compressive strength of the concrete by relating the rebound index and the compressive strength. To assess the quality of the concrete based on the standard specifications.
Is code used in rebound hammer test?
What is Q value in rebound hammer test?
The “Q”-value (rebound V divided by inbound V) represents the physical rebound coefficient. It is virtually free of all the above friction error sources. It is this which makes it the indicator of choice to be used as a basis to convert to compressive strength.
What is unit of rebound hammer?
A Schmidt hammer, also known as a Swiss hammer or a rebound hammer or concrete hammer test, is a device to measure the elastic properties or strength of concrete or rock, mainly surface hardness and penetration resistance.