The white patches usually appear prior to the peak stress of the specimen.
White patches in marble test specimen.
Women s high heels or blunt pointed instruments are common reasons for stun marks.
The white patches usually appear prior to the peak stress of the specimen.
Coloured marbles are again classified based on their colour and have different properties.
The procedures to test absorption astm c97 and its counterpart en 13755 determination of water absorption at atmospheric pressure use a similar sized specimen with a similar procedure.
The appearance of shear white patches may be caused by the weak interfaces or damage zones inside marble specimens.
In general for marble specimens under uniaxial compression the white patches occur much earlier before the appearance of visible cracks which accompany the specimen failure.
Stun marks appear as white marks on the surface of the stone and are common in certain types of marble.
The shear cracks usually initiate at or near the flaw tips and propagate to form x or half x shear belts that dominate the.
Such a white patch development and surface deformation including.
The ratio of the stress corresponding to the first white patch occurrence around the flaw to the peak stress attained in the specimen is found to vary with the loading conditions.
The shear cracks usually initiate at or near the flaw tips and propagate to form x or half x shear belts that dominate the macroscopic failure under impact loading.
The parallel esem study on gypsum showed that the extent of process zone development associated with macroscopic tensile cracking wasnless.
Marbles are classified broadly classified as white marble and coloured marble.
The dynamic increase factor is computed revealing a strong strain rate dependence of the carrara marble when subjected to strain rates above 1 s 1.
11 e and f.
These stuns are the result of tiny explosions inside the crystal of the stone.
The primary difference is the mode of immersion in which case the astm method immerses the test specimen completely without delay.
When the impact number is large the dynamic three point bending fracture of the specimens is manifested as a non pure tensile failure fig.
Pin point pressures placed on the marble cause these marks.
White marbles are generally plain white marble with coarse grains predominantly showing mica particles giving reflection in light.