| Test item |
GB4100.1standard requirements(highest national standard of china for wall and tiles) |
Enterprise standard |
| Size windage ( % ) |
| Side length |
 |
± 0.5 |
|
± 0.1 |
| Edge straight degree ( % ) |
± 0.3 |
± 0.1 |
| Right angle degree ( % ) |
First-rate product± 0.3 |
± 0.1 |
| surface smoothness ( % ) |
| Central bending degree |
First-rate product± 0.3 |
| camber |
First-rate product± 0.3 |
| camber |
First-rate product± 0.3 |
|
|
| Surface quality (first-rate) |
At least 95% of the tile are vertically observed from 0.8 |
At least 95% of the tiles are vertically observed from 0.8meter to have no surface defects |
| Water absorption ratio ( % ) |
Average value ≤ 0.5
Single value ≤ 0.6 |
≤ 0.15
≤ 0.2 |
| Breakage strength ( N ) |
When thickness ≥ 7.5mm 时， average value ≥ 1300 |
≥ 2000N |
| breakage modulus ( Mpa ) |
Average value ≥ 35
Single value ≥ 32 |
≥ 36
≥ 36
|
| Heat shake resistance |
|
Without crack or flaw after 10 times thermal shock resistance test
|
|
Without crack or flaw after 10 times thermal shock resistance test |
| Resistance to glaze cracking |
Without any flaw or peeling of the glaze through the antiglaze flaw test |
Without any flaw or peeling of the glaze through the antiglaze flaw test |
| Resistance to family |
Not lower than GB grade after test |
GA grade |
| Pollution-proof ability |
Not lower than 3 rd grade after the pollution-proof teat |
5 grade |
| Pollution-proof ability |
|
Examined and graded after dipping in 3%HCL solution for 4 days
|
|
GLA grade |
| The alkali-proof |
Examined and graded after dipping in 30g/LKOH solution for 4 days |
GLA grade |
| Moh's hardness |
|
≥ 6 |
| Coefficient of static friction |
Report the floor tile coefficient of friction after test (dry method) |
> 0.65 |
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