Features of quality and using capacity of white sand in the
(Quảng Bình Province) and Phong Điền (Thừa Thiên Huế Province) areas
Dương Văn Huấn, Biện Xuân Thành
White sand of marine-eolian origin in the Ba Đồn (Quảng Bình Province) and Phong Điền (Thừa Thiên Huế Province) areas forms sand dunes with the width of 140-500 m, the length of 400-3,200 m, the thickness of 2.1-2.5 m and the absolute height of 4.58-8.9 m, extending in a nearly north-south direction. Its composition consists mainly of white, greyish-white sand, regularly small-grained sand. The chemical composition of sand is as follows (%): SiO2 = 99,10; Fe2O3 = 0,06; FeO = 0,34; TiO2 = 0,03; Cr2O3 = 0,002; Al2O3 = 0,08; K2O = 0,02; Na2O = 0,02; CaO <0,01; MgO <0,01; P2O5 <0,005; SO3 <0,005; LOI = 0,09. After washing, the product reaches the quality of raw materials for such industries as: pottery, fire-brick, casting mould, polishing powder, glass, technique concrete, etc..
Người biên tập: Trần Đình Sâm.