Paper Title :Assessment of the Beduh Deposits (Lower Triassic) for Lightweight Aggregates, North Amadyia, Kurdistan Region – Iraq
Author :Farhad A. Hakeem
Article Citation :Farhad A. Hakeem ,
(2017 ) " Assessment of the Beduh Deposits (Lower Triassic) for Lightweight Aggregates, North Amadyia, Kurdistan Region – Iraq " ,
International Journal of Management and Applied Science (IJMAS) ,
pp. 103-112,
Volume-3,Issue-2
Abstract : This study deals with the assessment of deposits of the Beduh Formation (Lower Triassic) for lightweight
aggregate. It is carried out on channel samples of three exposures (Beduhe, Sararu and Nazdur) at north of Amadyia.
Lithologically, the formation consists of alternation of reddish purple, reddish brown and greenish grey shale with
subordinate thin sandstone beds and some siltstone streaks. XRD analysis revealed that the studied samples are composed
mainly of clay minerals such as illite in major proportion with kaolinite, chlorite, smectite and mixed-layer illite-smectite in
minor proportions. The non-clay minerals are quartz and calcite, in major proportions and minor proportions of feldspar and
hematite. Grain size analysis showed that the raw materials are composed mainly of clay and silt, with subordinate sand. The
plasticity index of these shales is high due to high clay content. Chemical analyses show that the raw materials are composed
essentially of silica, alumina, calcium oxide and relatively a less proportion of iron oxide, and appreciable amounts of MgO,
K2O, Na2O, TiO2 and MnO. The raw materials are ground and sieved to two sizes: fine size (less than 0.075 mm) and coarse
size (less than 1.00 mm). Water is added (about 12-15 %) to the sieved samples and thoroughly mixed, pelletized by hand to
lumps named here pellets (about 18-20 mm diameter). The pellets are dried and fired at different temperatures with different
soaking times. The evaluation physical tests (bloating, porosity, water absorption and bulk density) shows that the best
results achieved through flash firing at 1120°C with soaking time 30 minutes and rapid cooling, after pre-heating to about
300 to 350°C for 10 to 15 minutes. The coarse raw materials (less than 1.00 mm) show better results than the finer size (less
than 0.075 mm).
Index Terms- Beduh shale, bloating, flash firing, lightweight aggregate
Type : Research paper
Published : Volume-3,Issue-2
DOIONLINE NO - IJMAS-IRAJ-DOIONLINE-7262
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Published on 2017-05-11 |
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