Asphalt is a material that has non-volatile properties and softens gradually when heated and functions as a binder for aggregates and as a surface covering material to make it impermeable to water. However, asphalt also has a weakness. Namely, it is easy to crack and be damaged when vehicles pass through the main road. To overcome cracked and worn roads, it is necessary to test the ductility of asphalt so that the road becomes flexible/plastic. This ductility test is very important because it greatly affects the pavement layer; Therefore, a ductility test is needed to determine the level of plasticity of an asphalt. The asphalt ductility test method refers to the specifications of ASTM D113 – 07 and SNI 2432:2011 with 3 samples of test objects and a test instrument called a ductilometer of type TAS – 250. Based on the ductility test, the asphalt ductility reaches an average elongation of 117.33 cm; This value indicates that the plasticity level of the asphalt has met the specifications and can be used in sustainable pavement construction layers because it has good plasticity.
Tujuan dilakukan penelitian ini adalah untuk mendapatkan komposisi terbaik dari penggunaan agregat kasar dari Kedak dan Pasir Lumajang, sehingga mampu meningkatkan nilai stabilitas jalan. Metode yang digunakan yaitu metode eksperimental dengan pembuatan benda uji jenis lapis aspal beton yaitu AC-BC dengan variasi campuran 4,2% aspal. Beberapa pengujian untuk mendapatkan karakteristik agregat yaitu uji gradasi ayakan, uji abrasi, uji berat jenis sementara pengujian untuk mendapatkan hasil stabilitas adalah uji Marshall (Stabilitas, Flow, volumetric). Kesimpulan dari hasil pengujian Marshall dengan penggunaan agregat kasar koral Kedak Kediri dan agregat halus pasir Lumajang didapatkan nilai stabilitas rata-rata sebesar 4.843 kg hal tersebut menunjukkan adanya pengaruh yang signifikan terhadap nilai stabilitas lapis perkerasan lentur normal sebesar 800 kg sehingga hasil tersebut menunjukkan penggunaan agregat kasar koral Kedak Kediri dan agregat halus pasir Lumajang meningkatkan nilai stabilitas yang akan berdampak pada daya tahan lapis perkerasan jalan kondisi lalu lintas tinggi dan tingkat umur layanan jalan yang direncanakan akan tercapai.
Concrete asphalt layer specimens are a mixture of coarse aggregate, fine aggregate, filler, and asphalt, which are crushed based on the number of collision plans. This study aims to determine the optimum number of collisions of concrete asphalt layer specimens using 100% coarse limestone aggregate against the Marshall Test. Marshall Tests produce Stability, Flow, and MQ values that are used to determine the age of the concrete asphalt layer plan. The stages of testing in this research were mixing the rough aggregate of limestone escaped sieve no. 3/4 - 8 mm or granular diameter between 0.5 cm - 2 cm, fine aggregate, filler, and asphalt. After mixing evenly and asphalt has covered all the aggregates, the mixture was inserted asphalt mold made of brass with a diameter of 100 mm height 65 mm. The next process is a compaction of the test specimen with five variations of collisions (50, 75, 100, 125, 150). After the test object is compacted, then a Marshall test is performed to find out the value of Stability, Flow, and MQ. The results of this study indicate that the optimum number of collisions is 100 times. This can be seen from the value of Stability: 1412 kg, Flow: 4.02 mm, and MQ: 351.2 kg/mm.
The foundation is an important part of the building structure because it functions as a support. The selection of this pile foundation has various considerations, namely the pile foundation can achieve the hardest soil bearing capacity, made with a manufacturing system, then the quality of the concrete can be guaranteed, the soil bearing capacity is not only obtained from the tip of the pile. Foundation planning needs to be well planned to support user safety and comfort. Pile foundation is one type of foundation chosen because it is more cost-effective and quality than other foundations. This study aims to plan the pile foundation for a new building at Baptist Hospital Kediri. The calculations carried out include calculating the load received by each column, the carrying capacity of a single pile permit, the dimensions and depth of the pile, as well as the required pile cap dimensions. Calculation of the pile foundation is carried out using the Mayerhoff method. The calculation results show that the load on the column area (K13) is 212.23.04 tons, the carrying capacity of the single pile permit (Qall) is 87509.33 kg and Quult is 218773.3 kg and the use of 4 piles on one pile with dimensions of 40 x 40 cm with a depth of 10.6 m, With these results can be used as a reference in the construction of a new building Baptist Hospital that is safe and able to withstand the load of the building.
The foundation is a lower structural element that serves to with stand the load of the upper structure. Pile foundation is one type of deep foundation, which is widely used in the construction of buildings. Pile foundation used in hard soil cases is located at a very deep depth. Abipraya Building is a building located in kediri regency which later functioned as a rural office. This study aims to increase the carrying capacity of pile foundation in the abipraya building project using the begemann method. Calculations carried out include the calculation of loading, carrying capacity, buckling factor and determination of foundation point. Based on the calculations obtained the results of axial load (sigma Vertical Ultimate) Σνυ of 99.70. with a single-pole carrying capacity of 38.89 tons and a group pole carrying capacity of 117,917 tons. These results will be planned the foundation of the stake with a diameter of 30 with a depth of 8 meters, amounting to 4 poles. Calculation factor buckling results in 194.14 kg/cm2 smaller than the allowed maximum 2400 kg/cm2. Thus, with the known components of the planning of the pile foundation, it can be used as a reference in the construction of the abipraya building.
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