Stones used in construction works must have the following characteristics: 1. The texture of the stone must have a healthy structure, i.e. without grooves, cracks, and loose veins (not cremo). 2. Be free of any defects 3. Do not have decay 4. Be uniform, uniform and homogeneous 5. Building stone should not absorb a lot of water, so it should not: 6. Disintegrate or dissolve in water 7. All or part of it absorbs water more than 8% of its weight 8. Building stone should not be contaminated with natural and artificial materials 9. The stone must withstand the physical and chemical conditions of the environment, so it must: 10. To resist wind, frost, temperature changes and, if there is water flow, against it and all erosion factors. 11. To resist acidic and alkaline chemical environments as well as dehydration and oxidation 12. The compressive strength for bearing parts should not be less than 150 kg/cm2 - it should be resistant to wear.
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