No.

Item

Unit

Standard requirement

Result

1

Dimension deviation

(%)

Length

±0.50

+0.33

Width

±0.50

-0.45

2

Edge straightness

(%)

High-class product ±0.20

+0.06

3

Squareness

(%)

High-class product ±0.30

-0.04~+0.07

4

Surface smoothness

(%)

Central flexibility(high-class)

+0.40

-0.20

+0.25

-0.05

Edge flexibility(high-class)

+0.40

-0.20

+0.08

-0.05

Angularity(high-class)

±0.30

-0.10~+0.15

5

Surface quality(high-class)

—

At least 95%tiles have no surface defect found by straight observation from a distance of 0.8m

Conform to

6

Water absorption

(%)

Mean value 10﹤E≤20

17.6

17.4~18.1

Single value≥9 single≥9

7

Failing strength

N

When thickness≥7.5mm,average≥600

617.6

8

Modulus of rupture

Mpa

Mean value≥15 average≥15

18.4

17.3~19.1

Single value≥12 single≥12

9

Heat vibration resistance

-----

No explosion or crack occurs after 10 heat vibration resistance tests

Conform to

10

Crack resistance

-----

No crack or spall on the glazed surface after pollution resistance test

Conform to

11

Pollution resistance

-----

No lower than grade 3 for glazed tile after pollution resistance test

Grade 5

12

Acid resistance

-----

Test for grading after being put into 3% HCL. For 4d

GLA grade

13

Alkali resistance

-----

Test for grading after being put into 30g/LKOH for 4d

GLA grade

14

radioactivity

-----

≤200Gy/h(inclusive)

189.9nGy/h