Nero Afrika Origin: Africa Block sizes: Even big blocks Colour uniformity: Excellent Availability: Excellent Material used for: interior exterior Polishing treatment: Excellent Other surface's treatments: Well. specially sand blasting General comments: Material to be involved even in big jobs. The high uniformity in colour puts this material on the top of the range. Special care Examples of tests' results: 1. Compressive strength 2365/2771 Kg.sq.cm. 2. Ditto after gelivity 2514/2992 Kg/sq.cm. 3. Water absorption 0.02% 4. Ultimate tensil strength 257/271 Kg/sq.cm. 5. Impact test-min.fall height 65/70 cm. 6. Coef. thermal expans 6.535 7. Abrasion coefficient --- 8. Bulk density 2942.5 Kg/m3. 9. Elasticity module 1.064.000 Kg/sq.cm. 10. Knoop microhardness --- 11. Flexural strength --- 12. Porosity ---       Затвори