Evaluation of the Waras Serpentinite Rocks for Dimension Stone, Mawat Ophiolite Complex, Kurdistan Region, NE Iraq
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Abstract
The Mawat ophiolite complex (MOC) is a part of the Zagros Suture Zone, which extends of about 2000 km from southeastern Turkey through northern Syria and Iraq to western and southern Iran. The serpentinite rocks are exposed at Waras area near Betwat village. Serpentinite rocks from this area have been studied to assess their suitability for use as dimension stone. Ten samples were collected in the studied area to establish their physical and mechanical properties. Petrographic studies indicate that the serpentinite rocks in the studied area are composed mostly of serpentine minerals so the results of the color measurement show multiple colors of the studied samples after polishing which are grayish green, greenish black, brownish black, olive brown and dark yellowish green. Physical properties for the studied samples were determined they show low bulk density while the water absorption for all the studied samples except sample (10) show suitability for the interior uses, as well as only the samples (4, 6, 7, 8 and 9) exhibit suitable range of interior and exterior uses. The results of the compressive strength and modulus of rupture of the studied samples are below the requirement. According to the American Standard for Testing and Materials, ASTM C1526-02(2002) the serpentinite rocks from Waras area is not suitable for the use as dimension stone.
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