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newstarstone
Granite panels, should be qualified to achieve the four indicators of the physical properties
The bulk density of ≧ 2.56g/cm3
Water absorption ≦ 0.60%
Drying degree of compression (compression) ≧ 100MPa
Degree of bending (bending) ≧ 8.0MPa
Qualified marble panels, should reach the four physical performance indicators
The bulk density of ≧ 2.60g/cm3
Water absorption ≦ 0.5%
Drying degree of compression (compression) ≧ 50MPa
Degree of bending (bending) ≧ 7.0MPa
What is the compression strength, compressive strength of stone?
The compressive strength anti-destruction ability of rock under uniaxial compression. The compressive strength of the size of that rock hard.
The compressive strength expressed in MPa, 1MPa = 10.2kg / c ㎡ (kgf / square cm)
A standard atmospheric pressure = 760 mm Hg = 76 cm Hg = 1.013 × 105 pascals = 10.336 m water column.
In order to ensure that the standard atmospheric pressure is a constant value resolution 1954 Tenth International Measurement Conference Statement, the provisions of the standard atmospheric pressure is 1 atm = 101 325 N / m 2
The standard of "JC205-92 natural granite building boards, dry compressive strength not less than 60.0MPa.
"JC79-92 natural marble for building slab" standards, marble dry compressive strength not less than 20.0MPa.
In general, granite compression strength compressive strength between 110-245MPa, marble 70 to 110MPa between
What is the bending strength, bending resistance of the stone?
Bending strength is equivalent to the previously called the flexural capacity, refers to a certain standard of decorative plates on the two support points to the ability to resist fracture.
Stone bending strength than the compressive strength, compressive strength of 1/14 ~ 1/8 the test is about. Generally come to the compressive strength to flexural strength can be broadly speculated. General the greater the bending strength of the plate prone to breaking.
According to the standard of "JC205-92 natural granite building slab, the bending strength not less than 8.0MPa," JC79-92 natural marble for building slab "standards, the bending strength not less than 7MPa
Such as the granite Cenxi red bending strength 23.56MPa, marble Dandong green flexural strength of 8.57MPa.
What is the bulk density and water absorption of the stone?
The bulk density of the stone quality and volume ratio. Density that rock the proportion of significant capacity, high stability in the process of sawing, grinding, polishing, cutting.
Water absorption refers to the stone water absorption capacity, reflecting that the stone contained within the pore volume, size and distribution and connectivity.
Rock water absorption <1.5% <0.5% as the performance of weathering, frost resistance or can not do the frost resistance test.
What is gloss?
The gloss is an important part of evaluation of the quality of decorative stone, color and variety, it is the main basis of the measure of stone quality.
"JC79-92 natural marble for building slab" standards, marble, mirror plate, the main chemical ingredient of different gloss minimum requirements (qualified product) not less than 70,60,40 gloss units.
"JC205-92 natural granite building boards, gloss minimum requirements shall not be less than 75 gloss units.
