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Luoyang Gongyan Technology Co., Ltd
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Price: | 1.0~50.0 USD |
Payment Terms: | T/T |
Place of Origin: | Henan, China (Mainland) |
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item | technical parameter |
ring stiffness(KN/m2) | ≥6.3 |
flattening test | Give pressure in vertical and diameter deformation at 40%,unloading immediately, it no crack, no separation of layers |
Hammer falling impact test | It should be no cracks, under the condition of 0℃, one meter height, and be stricked ten times by a 1 kg hammer. |
low temperature drop test | The sample should no cracks, under the condition of -30℃, one meter height and free falling. |
vertical shrinkage ratio (%) | ≤3 |
water permeable area (cm per linear meter) | ≥42 |
hole density | 10×1mm≤30×3mm surface should be homogeneous ,and the inner wall should be smooth , no burr. |