CTH-1 concrete test hammer

详情

CTH*1 concrete test hammer

BS ********2 BS *******2 ASTM C***5 ASTM C **5, ASTM D ***3 (rock)

The instrument works on the principle that the rebound of an elastic mass impacting on a surface is a function of the hardness of the surface itself. Hence the harder the surface, the greater is the rebound distance.

The test sequence consists of:

1. prior to using the hammer, the surface of the concrete is first abraded with the carborundum stone to remove surface irregularities.

2. the hammer is then pushed firmly against the concrete until the the trigger is automatically released

3. hand pressure is then reduced, to allow the plunger to fully emerge from the instrument.

4. extra hand pressure is then applied to push the plunger back into the instrument, compressing the internal spring to a point where the trigger mechanism over-rides and causes the impact force to be applied to the surface.

5. still applying hand pressure, the push is pressed to lock the plunger in place, retaining the reading on the graduated scale.

6. the strength corresponding to the reading on the scale is then noted.

7. if concrete test cubes from the structure are available, then using the hammer on these will allow a more accurate answer to be established.

Function:

a. Concrete Testing Hammer, commonly used for testing of strength and hardness of various types of concrete materials. 

b. Used to evaluate the surface hardness of hardened concrete in order to evaluate the strength in various parts of the structure

Features:

a. Center oriented rod using imported materials, high precision, wear-resistant;

b.As per shell use superhard Al alloy material, therefore it avoid to damage instrument in-site woke, and to extend the instrument's life;

c.Pointer slider with external spring ring structure, not only it is convenient for the friction adjustment, but also it ensures that the friction force for pointer shaft and slider is uniform, and to ensure the accuracy of the instrument.

d.The product accuracy is high relative to same prodcuts, at the same time , it quality is best and price is cheap, and  instrument's life is long.

Main technical parameters

Accessories:

TH*1 TA test anvil for test hanmmers