Rancangan Penggunaan Variasi Gradasi Agregat Gabungan terhadap Campuran Lataston HRS-WC menggunakan Metode Marshall

TONU, Fransiskus Xaverius Bayo (2024) Rancangan Penggunaan Variasi Gradasi Agregat Gabungan terhadap Campuran Lataston HRS-WC menggunakan Metode Marshall. Undergraduate thesis, Universitas Katolik Widya Mandira Kupang.

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Abstract

In the process of designing road pavement consists of several structural elements, namely the base soil (Subgrade), the lower layer of the subgrade (Subbase Course). The surface layer element (Surface Course) functions as a pavement material to withstand wheel loads, as a watertight layer to protect the road body from the effects of weather as a wearing layer (Warning Course). Thin layer asphalt concrete (Lataston) is a road pavement layer consisting of a mixture of hard asphalt, aggregate with gap gradation, and filler. which is mixed, spread and compacted at certain temperatures and conditions with a thickness of between 2.5 to 3 cm. Gradation is one of the aggregate properties that affects the quality of the asphalt mixture. Gradation also has a gradation limit, including the upper gradation limit (tending to be smooth) and the lower gradation limit (coarse), and the middle gradation limit (tending to be ideal). The method used in planning asphalt concrete mixtures is the Marshall method. The materials and data sources were obtained from the Suku Tokan Quarry , Stock Pile owned by PT. Bumi Indah, the results of laboratory research. The results of the study indicate that the characteristics of aggregates originating from the Taokan Quarry , for the HRS-WC Lataston mixture meet the specifications set out in Bina Marga 2018 revision 2. The composition design for the HRS-WC Lataston mixture for three gradation variations is for gradation variation one, upper limit (tending to be fine), crushed stone ¾ "16%, crushed stone ½" 7%, fly ash 68%, sand 8%, and cement 1%. Gradation variation two, Lower limit (tending to be coarse) crushed stone ¾ "25%, crushed stone ½" 26%, fly ash 40%, sand 8%, and cement 1%. Gradation variation three, ideal limit (tending to be ideal), crushed stone ¾ "20%, crushed stone ½" 20%, fly ash 55%, sand 4%, and cement 1%. In the research conducted, the optimum asphalt content values obtained for gradation variations one, two and three were 7.30%, 7.0% and 7.13% respectively. Marshall parameter values achieved in the HRS-WC lataston mixture study with three gradation variations, namely, for Gradation Variation one (upper limit), Stability = 877.0Kg, Flow = 2.83 mm, Marshall Quitient (MQ) = 314.018 Kg/mm, Voids in the mixture (VIM) = 4.03%, Voids in aggregate (VMA) = 19.59%, Voids filled with asphalt (VFA) = 79.43%. Gradation variation two (lower limit), Stability = 978.7Kg, Flow = 2.72 mm, Marshall Quitient (MQ) = 357.392Kg/mm, Voids in the mixture (VIM) = 4.25%, Voids in aggregate (VMA) = 19.33%, Voids filled with asphalt (VFA) = 78.03%. Gradation variation three (ideal limit), Stability = 946.5Kg, Flow = 3.07 mm, Marshall Quitient (MQ) = 308.399 Kg/mm, Voids in the mixture (VIM) = 3.93%, Voids in aggregate (VMA) = 19.40%, Voids filled with asphalt (VFA) = 79.77%.

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