PENENTUAN NILAI TINGKAT KEMAGNETAN DAN SUSEPTIBILITAS MAGNETIK PASIR DAN DEBU SEPANJANG JALAN UTAMA DI KOTA PEKANBARU

Abstract

The magnetic degree and susceptibility of sand and dust along main roads in Pekanbaru, such as Arifin Ahmad, Imam Munandar, Naga Sakti, Soebrantas, Sudirman and Tuanku Tambusai has been determined. The mass of samples taken for each location was 8 kg. The iron contained of the sample was separated from sand and dust using iron sand separator. The method used in this study was the experimental method. Magnetic induction of the sampel was measured using Magnetic Probe Pasco 2162. In order to measure total magnetic induction of the sample, it is necessary prepare a solenoid with dimentions of 360 turns, with a diameter of 2.1 cm and a length of 8 cm. Total magnetic induction was measured as a function of applied current (2, 4, 6, 8, 10 A) and the horizontal distance (1, 2, 3, 4, 5 mm). The results of this study showed that the highest and lowest levels of magnetic degree originated from sand and dust along Soebrantas and Tuanku Tambusai roads whose value are respectively 2.375% and 0.625%. The magnetic susceptibility values along Arifin Ahmad road was 4.04 x 10-4, which is the the highest among the other roads, while the lowest value of the magnetic susceptibility originates from Tuanku Tambusai road, that was 3.23 x 10-4. These values lied in the interval of the values of magnetic susceptibility of magnetite, maghemite and hematite that is 0.001 x 10-4 to 11 x 10-4, which means that the magnetic susceptibility of each sample found consist of magnetite Fe3O4 particles