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All Journal Nusantara Hasana Journal Jurnal Konstruksi
Indra Jhon Fischer
Politeknik Negeri Medan
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Nursing

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KARAKTERISTIK SIFAT FISIK TANAH BERDASARKAN UJI KADAR AIR, BERAT JENIS, BATAS ATTEERBERG, DAN ANALISIS SARINGAN (STUDI KASUS JL. SETIA BUDI, MEDAN, SUMATERA UTARA) Indi Rezki Uli Simanjuntak; Agnes Br. Manurung; Juni Indriani; Indra Jhon Fischer; Frans Tomy Syahputra Butarbutar
Nusantara Hasana Journal Vol. 5 No. 12 (2026): Nusantara Hasana Journal, May 2026
Publisher : Yayasan Nusantara Hasana Berdikari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59003/nhj.v5i12.2137

Abstract

Soil as a construction supporting material requires accurate physical properties characterization to ensure structural stability and safety. This study aims to characterize the physical properties of soil in the area of the Civil Engineering Laboratory, Politeknik Negeri Medan through testing of water content, specific gravity, Atterberg limits, and gradation analysis. Disturbed soil samples were tested using SNI and ASTM standard procedures. The results showed an average water content of 18.45%, an average specific gravity of 2.6515, a liquid limit (LL) of 25%, and the soil exhibited non-plastic (NP) behavior with the plastic limit unable to be meaningfully determined. Gradation analysis revealed 87.24% sand fraction and only 12.76% passing the No. 200 sieve, with a uniformity coefficient (Cu) of 6.67 and coefficient of curvature (Cc) of 0.60. Based on the USCS system, the soil is classified as SP (Poorly Graded Sand), while according to AASHTO it belongs to group A-3 (Non-plastic Fine Sand). The non-plastic nature of the soil indicates relative stability against moisture changes, making it suitable for use as fill material or road base layer, though susceptibility to erosion and liquefaction under saturated conditions should be considered. This research provides essential geotechnical baseline data for construction planning and further studies within the Politeknik Negeri Medan environment.
Studi Eksperimental Penggunaan Admixture Superplasticizer dalam Upaya Terhadap Peningkatan Kuat Tekan Beton Muhammad Rizki Harahap; Indra Jhon Fischer
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.3531

Abstract

Beton adalah material komposit yang terdiri dari semen Portland, air, agregat halus, agregat kasar, dan bahan tambah tertentu yang diformulasikan dalam proporsi yang telah direncanakan untuk menghasilkan mutu beton sesuai persyaratan. Pemanfaatan admixture menjadi salah satu metode pendekatan yang umum diterapkan untuk meningkatkan karakteristik mekanis beton, terutama kuat tekan. Dalam penelitian ini mengaplikasikan admixture superplasticizer pada campuran beton mutu K-175. Pendekatan eksperimental diterapkan melalui serangkaian pengujian di laboratorium bahan Politeknik Negeri Medan. Sampel penelitian terdiri dari beton normal dan beton dengan penambahan admixture sebesar 1,5% dari berat semen. Pengujian kuat tekan dilakukan pada umur beton 28 hari. Hasil penelitian menunjukkan bahwa beton normal memiliki kuat tekan rata-rata sebesar 13,07 MPa, sedangkan beton dengan penambahan admixture superplasticizer mencapai 16,13 MPa setara sekitar 23,41%. Dengan demikian, penggunaan admixture terbukti mampu meningkatkan kuat tekan beton sebesar 3,06 MPa dibandingkan beton tanpa bahan tambah.
Co-Authors Agnes Br. Manurung Frans Tomy Syahputra Butarbutar Indi Rezki Uli Simanjuntak Juni Indriani Muhammad Rizki Harahap