ANALISIS UJI KUAT TEKAN UNIAKSIAL TERHADAP BATUPASIR BERLAMINASI PADA FORMASI BALIKPAPAN DAN FORMASI PULAUBALANG, KOTA SAMARINDA, PROVINSI KALIMANTAN TIMUR (Uniaxial Compressive Strength Test Analysis of Laminated Sandstone in the Balikpapan Formation and
Abstract
Sandstone is one of the rocks that are often found in sedimentary basins in the world. Sedimentary rock is a type of rock formed as a result of the deposition process. The deposition is caused by various transport forces such as water, wind and ice. The difference in energy and depositional environment causes the layering structure of sedimentary rocks to vary, one of which is lamination. Lamination is a sedimentary layer structure that shows parallel (horizontal) layers, which are formed due to variations in the rate of deposition of different materials. Therefore, this study was conducted to determine the strength of a rock if it has a laminated structure with varying angles. Uniaxial Compressive Strength Test is how the rock can maintain its elasticity before collapsing. The research was conducted in 2 different formations, namely the Balikpapan Formation and the Pulaubalang Formation. The test results show that the Balikpapan Formation has an average compressive strength value for each corner. At an angle of 00 = 2.31 Mpa, an angle of 300 = 1.82 Mpa, an angle of 450 = 2.13 Mpa, an angle of 600 = 2.47 Mpa and at an angle of 900 = 3.57 Mpa. In the Pulaubalang Formation, the average compressive strength value is obtained at an angle of 00 = 3.69 Mpa, an angle of 300 = 2.35 Mpa, an angle of 450 = 2.39 Mpa, an angle of 600 = 3 Mpa and at an angle of 900 = 3.95 Mpa. . So, from the results of research and data processing that has been carried out the minimum compressive strength value is at a lamination angle of 300 and has a maximum value of compressive strength at an angle of 900. And from the two research formations, the Pulaubalang Formation has a higher rock strength than the Balikpapan Formation.
