NAROTAMA JURNAL TEKNIK SIPIL

ANALISIS KAPASITAS SALURAN DRAINASE DI SUB PEMATUSAN KALI RUNGKUT SURABAYA

Nurul Jannah Asid — 2025-02-03

Surabaya City is the provincial capital as well as the largest city in East Java. Infrastructure development to support the development of the city of Surabaya and the impact that occurs to meet the needs of the community causes the transfer of land functions. As a result, it can increase the impermeable layer on the soil surface which will reduce rainwater seeping into the soil and creating a burden on drainage channels. This should be reviewed against the dimensions of existing drainage channels to minimize flooding. Based on the results of hydrological calculations and hydraulics calculations, conclusions were obtained for the study of the capacity analysis of the drainage channel of the Surabaya Rungkut River Sub-Commissioning as follows: In the 1.25-year anniversary period, the Medokan Rungkut channel has been unable to accommodate flood discharge. In the 5-year anniversary period, the Rungkut Asri channel is no longer able to accommodate flood discharge. And in the 10-year anniversary period, the Rungkut channel was no longer able to accommodate flood discharge. The dimensions of the 3 channels are enlarged so that they can accommodate the flood discharge that occurs. The capacity of the Rungkut channel becomes 6.3 m³/s, the Rungkut Asri channel becomes 5.6 m³/s, the Rungkut Medokan channel becomes 5.6 m³/s. The pump capacity is taken from the Rungkut channel with flood discharge Q10 = 6.1285 m³/s, with a pipe diameter design of 2.25 m and a large water power of 343.6 HP.

PENGARUH FLY ASH SEBAGAI PENGGANTI SEBAGIAN SEMEN TERHADAP KUAT TEKAN BETON SELF COMPACTING CONCRETE (SCC)

Firmansyah Risqi Prasetiyo — 2025-02-07

ABSTRACT

Self Compacting Concrete (SCC) is concrete that is able to compact itself without using a compactor or vibrator. Therefore, to reduce the use of cement in the Self Compacting Concrete (SCC) concrete mixture, admixture is used as a partial replacement for cement. The additional material used in this research is fly ash. Fly ash is the residue from burning coal which contains pozzolanic elements (SiO2, Al2O3 and Fe2O3) so that it can fill voids and become a binding material like cement. This research is experimental carried out in the laboratory. This research design carries out. This mixing carried out 3 variations of fly ash, 10%, 20% and 50%, while the addition of superplasticizer was 1%. This research was to determine of adding fly ash and superplasticizer on compressive strength. The compressive strength test for Self Compacting Concrete (SCC) concrete was carried out at ages 3, 14, 28 days. Based on the test results, it is known that the workability and compressive strength of Self Compacting Concrete (SCC) decreases as the fly ash content increases. The highest compressive strength was the fly ash mixture with a variation of 20%, namely with a compressive strength of 45.25 MPa, which met the planned compressive strength. Where the design compressive strength is 29.3 MPa.

ANALISIS KEBUTUHAN AIR BERSIH DOMESTIK DESA PINGGIRPAPAS DAERAH LAYANAN PDAM KOTA SUMENEP

Ach. Desmantri Rahmanto — 2025-01-27

Pinggirpapas Village is one of the villages in Kalianget District, Sumenep Regency which consists of 3 hamlets with a total population of 5337 people. Pinggirpapas Village is a coastal area surrounded by salt fields and the Madura Strait with the majority of residents' jobs being salt transport workers, casual daily workers, salt packaging workers, fishing workers and salt farming workers. Providing clean water is very important for the people of Sumenep City. To determine the need and availability of clean water in Pinggirpapas Village, Kalianget District, Sumenep Regency in the future with a clean water system from PDAM Sumenp City. Projections of clean water needs that must be provided for the next 5 years, 10 years, 15 years, 20 years and 25 years. The data analysis techniques used in this research are projections of the number of customers, projections of public facilities, projections of the amount of water needed, Epanet analysis, and clean water distribution piping systems. Analysis of the availability of water discharge for Kalianget District for the next 5 years is 94500 l/day, for the next 10 years it is 109900 l/day, for the next 15 years it is 125300 l/day, for the next 20 years it is 140700 l/day, and for In the next 25 years it will be 156,000 l/day. The estimated need for domestic clean water production for the next 5 years is 13,801 l/day, for the next 10 years it is 16,802 l/day, for the next 15 years it is 19,802 l/day, for the next 20 years it is 22,802 l/day, and for the next 25 years in the future it will be 25803 l/day.

PENGARUH PENAMBAHAN SERAT PLASTIK PET (POLYETHYLENE TEREPTHALATE) PADA BETON NORMAL TERHADAP KUAT LENTUR

Nanin Meyfa Utami — 2025-01-26

Plastik merupakan bahan yang sulit untuk diuraikan oleh bakteri pengurai dalam tanah. Penelitian ini bertujuan untuk memanfaatkan limbah plastik sebagai bahan tambahan pada bahan utama penyusun beton. Plastik diubah menjadi serat yang diharapkan dapat meningkatkan kuat lentur beton, dan berfungsi agar beton tidak mengalami keretakan pada saat proses pengerasan. Metode yang digunakan adalah serat plastik dipotong menyerupai serat memanjang, serta mix design untuk menentukan prosentase material berdasarkan pada SNI 03-2834-2000. Pengujian meliputi kuat tekan dan kuat lentur. Pengujian kuat tekan dilakukan sebatas hanya untuk kontrol mix design yang direncanakan. Penambahan serat plastik dilakukan setiap sepertiga dari tinggi cetakan dengan cara meletakkannya secara memanjang. Berdasarkan hasil uji kuat lentur, variasi dan prosentase yang paling optimal dalam meningkatkan kuat lentur adalah penambahan PET dan resin sebanyak 0,3% yang mampu meningkatkan kuat lentur beton sebanyak 51.78% dibandingkan dengan yang tanpa penambahan serat plastik. Model keruntuhan yang terjadi pada semua variasi benda uji yaitu keruntuhan lentur dikarenakan retakan beton terjadi pada daerah tengah bentang dan searah tegak lurus sumbu balok.