Granite Crushed Stone ( 3-8 Mm, 5-10 Mm, 10-20 Mm, 5-20 Mm, 20-40 Mm, 25-60 Mm, 20-70 Mm, 40-70 Mm)

Flakiness
Flakiness - defines the degree of flatness of rubble (from the word "bream", ie flat as bream). In the rubble of normalized content of lamellar and prickly form. For grains and needle plate forms include such grains, the thickness or width is less than the length of three times or more. The shape of the gravel grains are divided into four groups:
Group Content of lamellar and prickly form
I cuboid up to 15%
II improved from 15% to 25%
III typically from 25% to 35%
IV usually from 35% to 50%
It should be noted that the flakiness - one of the most important quality characteristics of rubble. Using the cube-shaped crushed stone provides the most dense ramming.

The presence in the rubble of lamellar and prickly form increases the intergranular emptiness in the mixture. This in turn increases the consumption of the binder and this entails extra material costs. Furthermore, cube-shaped grains are more durable than the grains of the plate and needle shapes. Therefore, the use of cube-shaped stones in the production economically feasible.

Frost-resistance

Frost rubble characterized by the number of cycles of freezing and thawing. Permission is granted to assess the frost resistance of rubble on the number of cycles of saturation in sodium sulfate solution and drying. As frost rubble divided into marks: F15, F25, F50, F100, F150, F200, F300, F400. The building is mainly used to mark the rubble of frost resistance not less than F300 (300 cycles of freezing and thawing).