Description
| ITEM | GB/T4100-2006 Appendix G GB REQUIRED STANDARDS |
HUIDA STANDARDS |
|---|---|---|
| LENGTH AND WIDTH |
±1mm | ±0.6mm |
| THICKNESS | ±5 | ±4 |
| STAIGHTNESS | ±0.2% and the maximum variation≤2.0mm |
±0.12% and the maximum variation≤1.0mm |
| WEDGING | length≤600mm,±0.2% and the maximum variation≤20mm length>600mm,length difference of opposite length and length difference of diagnal length≤2.0mm |
length≤600mm,±0.12% and the maximum variation≤0.6mm length>600mm,length difference of opposite length≤1.0mm,length difference of diagnal length≤1.5mm |
| SURFACE FLATNESS |
length≤600mm,±0.2% and the maximum variation≤2.0mm length>600mm,the maximum variation of upper convex and concave downward≤2.0mm |
length≤600mm,±0.12%and the maximum variation≤0.6mm length>600mm,the maximum variation of upper convex and concave downward≤1.5mm |
| SURFACE QUALITY |
from 1 m to observe, at least 95% of the brick its main area without obvious defects |
from 0.5 m to observe, at least 95% of the brick its main area without obvious defects |
| WATER ABSORPTION |
average≤0.5% individual≤0.6% |
average≤0.1% individual≤0.12% |
| DISRUPTIVE STRENGTH (N) |
THICKNESS≥7.5mm,≥1300N | THICKNESS≥7.5mm,≥1500N |
| BROKEN VALUE(Mpa) |
average≥35MPa minimum individual≥32MPa |
average≥38MPa minimum individual≥35MPa |
| ABRASION RESISTANCE |
≤175mm² | ≤150mm² |
| THERMAL EXPANSION COEFFICIENT |
non-mandatory | no crack after ten times cycle test between 15℃ and 145℃ |
| FROST RESISTANCE |
no crack or crazing after test | no crack or crazing after test |
| GLOSSINESS | ≥55° | ≥60° |
| DIRT RESISTANCE |
non-mandatory(class 1-5) | ≥class 3 |
| CORROSION RESISTANT | ≥GB | ≥GLA |

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