Garuda - Garba Rujukan Digital

Dyah Pratiwi Kusumastuti

Sekolah Tinggi Teknik PLN

Author-ID : 4035755

Civil Engineering, Building, Construction & Architecture Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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PERBAIKAN TANAH PADA TANAH GRANULAR DENGAN VIBROCOMPACTION Dyah Pratiwi Kusumastuti
FORUM MEKANIKA Vol 5 No 2 (2016): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Land requirements in big cities like Jakarta continues to increase with the growth in infrastructure development. Often the development and utilization of such land should be carried out on land that does not in accordance with the requirements. For example construction on the ground that is less stable during vibration or earthquake as granular soils. Compaction method is generally preferred in granular soil improvement because the method is suitable for use in soil layers not berkohesi that is not solid enough. Land improvements made to the land that has a fairly low technical characteristics become viable material used as a construction material. Benefits of using the technique of vibro compaction, among other things increase the weight of the volume of soil, reducing the decline foundation and reduce the impact of liquefaction.

TINJAUAN KUAT TEKAN BETON MUTU TINGGI DENGAN PENAMBAHAN TALI TAMBANG PLASTIK Abdul Rokhman; Dyah Pratiwi Kusumastuti
FORUM MEKANIKA Vol 5 No 1 (2016): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

High quality concrete as a construction material more widely used, but the higher of the concrete qualitywill cause ductility properties of concrete decreases. One way to decimate the mechanical properties of highstrength concrete is to provide additional materials in the concrete mix. This study aimed to determine theeffect of plastic rope in the concrete mixture. Technical properties of concrete under review due to theaddition of plastic rope to concrete is compressive strength. The method used in this research is to make a testpiece for later testing compressive strength. The test object is created by the addition of plastic rope along the5 cm, 7 cm and 10 cm as much as 0.5% by weight of coarse aggregate. Specimens were made for eachvariation is 3 pieces and will be tested on the concrete age 7 and 28 days. The planned results in this study isthe high quality concrete compressive strength of 55 MPa at the age of concrete 28 days. From the researchthat at the age of concrete 28 days minimum compressive strength of concrete specimen contained in theconcrete with the addition of 5 cm plastic ropes of 11.75 MPa or 21.36% of the compressive strength ofconcrete plans. The maximum concrete compressive strength at 28 days there on the concrete specimen withthe addition of plastic rope 7 and 10 cm at 12.14 MPa or 22.07% of the compressive strength of concreteplans.

Pengaruh Penambahan Serbuk Kaca Dan Abu Sekam Pada Tanah Lunak Berdasarkan Uji Konsolidasi Dyah Pratiwi Kusumastuti; Irma Sepriyanna Sepriyanna
FORUM MEKANIKA Vol 8 No 2 (2019): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

It can not be avoided when the construction must stand on soft soil, then the construction will suffer damage due to subsidence or congestion from soft soil. To improve soft soils as one part of the construction of them is the method of chemical stabilization of the soil. The stabilizer material mixed was 10% glass powder and the percentage of husk ash was 0%, 2.5%, 5%, 7.5% and 10% of the dry weight of the original soil sample. Changes in the characteristics of soft soil and stabilized soils are reviewed based on the consolidation test. Based on the results of the study, the value of the void ratio decreases with increasing glass dust and husk ash, where the lowest void ratio is 0.5328 obtained in the addition of 10% glass powder and 7.5% husk ash. A decrease in the void ratio indicates a decrease in the compression index (Cc) and the swelling index (Cs). The lowering of the compression index and the swelling index indicate that the addition of glass powder and husk ash causes the soft soil sample to become denser. The lowest compressive index and swelling index values were obtained in soil sample specimens with the addition of 10% glass powder and 10% husk ash, which respectively decreased by 35.165% and 75.757% when compared to the condition of the original soil sample.

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