Impact test - tests on stones, Civil Engineering

Impact Test:

Resistance of stones to impact is found by conducting tests in impacting testing machine .It contain of a frame with guides in which a metal hammer weighing 13.5 to15 kg may freely fall from a height of 380 mm.

913_impact testing machine.png

                  Aggregate impact testing machine

Aggregates of size 10 mm to 12.5 mm range are filled in cylinder in three equal layers; each layer being tamped 25 times. Similar is then transferred to the cup and again tamped 25 times. The hammer is then permitted to fall freely on the specimen 15 times. The specimen is then sieved throughout 2.36 mm sieve. Then,

674_impact testing machine1.png

Where           

 W2 = weight of fines

W1 = original weight.

The recommended impact values for several works are:

  • for wearing course >/30%
  • for bituminous mechadam >/35%
  • for water bound mechadam >/40%
Posted Date: 10/16/2012 2:12:06 AM | Location : United States







Related Discussions:- Impact test - tests on stones, Assignment Help, Ask Question on Impact test - tests on stones, Get Answer, Expert's Help, Impact test - tests on stones Discussions

Write discussion on Impact test - tests on stones
Your posts are moderated
Related Questions
a) Define the meanings of 'texture' and 'structure' of a soil. b) Write the meaning of 'black cotton soil'? Indicate the geological and climatic conditions that tend to make

How analysis of residents building g+3 structure analysisl


Determine about the Lee-McCall system In the Lee-McCall system, high-tensile strength bars of diameter varying from 12 to 40 rnrn are used as tendons. These bars are threaded a

Q. Illustrate Concept of filter design? The material used for filter should satisfy the following normal criteria a. Filter material is more pervious than the base material

lime saturation factor meaning with simple english

what is plastic?its types and composition and its uses as engineering material

three points problem

write a c program To compute interior angles and correct them for observational errors and adjusting the bearing of remaining sides when the bearings taken on a closed compass trav

Calculate the Modulus of elasticity of concrete A pre-stressed concrete beam, having a cross-section of 150 mm width and 400 mm depth, is used over a span of 8 m. Straight tend