Test item

European criterion  EN176-91

Chinese Criterion GB/T4100.1-1999

Test Results

Water absorption(%)

≤0.5

≤0.5

≤0.3

Modulus of rupture(MPa)

≥27

≥35

≥40

Breaking strength(N)

No

thickness≥7.5mm,average value≥1300N

≥1700

Length tolerance(%)

±0.6

±1.0mm

±0.5mm

Thickness tolerance(%)

±5

±5

±4

Surface flatness(%)

±0.5

±0.2

±0.1

Side straight(%)

±0.5

±0.2

±0.08

Right Angle(%)

±0.6

±0.2

±0.1

Abrasion Resistance(mm)

≤205

≤175

≤150

Mohs’scale of Hardness

≥6

NO

≥8

Hot & cold resistance

Agreement

No crack in 10 times cycle at 145°C-15°C

accordant

Frost resistance

No

No crack in 100 times cycle at +5°C--5°C

Accordant

Resistance of chemicals & pool chemical salt

Agreement

UA

UA

Acid & Alkali resistance

agreement

ULA.UHA

ULA.UHA

Surface polish

Agreement

≥55o

≥70o