Side length

SL≤100mm

100-300

SL>300mm

HG/3747.1-2004

Length & width

The average size of each sheet (2 or 4 sides) is relative to the the allowable deviation of average size of 10 brick.

±3.5%

±1.0%

±0.8%

Thickness

The average value of each sheet thickness is relative to the the maximum allowable deviation of nominal size thickness 0.5mm.

±0.5mm

Remarks

The size of product length and width shall subject to the upper edge size.
The thickness of irregular convex surface and retro brick, red brick are not required.

Appearance

At least 95% area, without visible defect ( dilapidation, sparging, separation on upper and lower course)

GB/T3810.2-2006

Surface density (kg/m^2)

≤8

GB/T4100-2006

Moisture rate (kg/m^2.h^0.5)

<0.1 (according to Europe standard)

EN1062-3:2008

Ventilation property, vapor flow density ( g/(m^2.h) )

≥0.85

GB/T17146-1997

Frost resistance

After 100times recycled use, without crackle, spalling, pulverization in visible

GB/T3810.12-2006

Age resistance

Without crackle in apperance, sparging and pulverization is less than 1 level

GB/T1865-1997

Combustibility

Thickness is more than 3mm, A level
thickness≤3mm according to requirements on tactile impression painting

GB/8624-2006

Tensile-strength

≥1.0MPa

GB/T528-2009

Dimension stability

±0.5%

HG/T3747.1-2004(6.3)

Anti pollution

Polish surface = 4level, Regular concave convex surface = 3 level, Irregular concave convex surface no request

GB/T3810.14-2006

Alkali stability

No dilapidation, spalling, like stone

GB/T3810.13-2006

Acid resistance (2%,H2SO3)

48 hours, no abnormalities

DBJ50-046-2006

Harmful substance limit

Dissoluble lead

≤20

HJ/T297-2006

Dissoluble cadmium

≤5

Cancerogen
TVOC (mg/kg)

≤0.5

GB/T18587-2001

Radioactivity

IRa

≤0.9

GB6566

Iy

≤1.2

Remarks: a) The shade of color lump, spots, stain, holes etc. which are made intentionally for artistic effect or natural texture effect shall not be applied to this provision, they should not be regarded as a defect. With the same variety of Boyuejia material, each texture with natural grain as the foundation and barely repeat, this case should not be regarded as inconsistence of the product surface; Its color similar to natural soil color in the same color range with some irregular depth change, this case should not be regarded as chromatism. The bottom edge allows some rough selvedge. In order to highlight the characteristic of color mixture PK brick, its color shall change in the standard sample color range; There is 10% chromaticity difference allowed between monochromatic products and standard sample. b) The above requirement is only for in the area which the average temperature below zero in January every year. c) The above requirement is only for the thickness =3.5mm product, not for the thickness ＜3.5mm product, The thickness ＜3.5mm product can be regarded as a thick coating material.