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Siahaan, Junaidi
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Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh penambahan natrium silikat (Na2SiO3) terhadap daya serap air dan kuat tekan pada batako Syahputra, Riyan; Siahaan, Junaidi
Jurnal VORTEKS Vol. 4 No. 1 (2023): April 2023
Publisher : Program Studi Teknik mesin, Fakultas Teknik, Universitas Al Azhar Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/vorteks.v4i1.267

Abstract

Penelitian ini dilakukan dalam rangka untuk mengetahui pengaruh Natrium Silikat (Na2CO3) pada kualitas batako yang dihasilkan. Konsentrasi yang dipakai dari 0%, 10%, 20%, hingga 30% berat semen yang digunakan. Perbandingan bahan campuran batako dari 1:7 (semen : pasir). Pengujuan Kuat Tekan dan Daya Serap Air batako dilaksanakan selepas umurnya 28 hari, dengan prosedur SNI: 03-0349-1989. Hasil penelitian diperoleh bahwa Natrium Silikat (Na2CO3) dengan konsentrasi 10%, 20% dan 30% terjadi penurunan kuat tekan sebesar sebesar 45,62 Mpa, 50.27 Mpa dan 59.03 Mpa, dibandingkan batako normal (kontrol). Sedangkan untuk daya serap air, mengalamai peningkatan 0.79%, 1.47% dan 2.31% dibanding batako normal. Kondisi ini bisa terjadi karena sifat fisik dari Natrium Silikat (Na2CO3) yang berbentuk jeli dan lekat, sehingga mempengaruhi daya penyebaran air keseluruh bahan campuran sehingga air tidak tercampur merata.
ANALISIS RASIO PROFITABILITAS DAN LIKUIDITAS TERHADAP KINERJA KEUANGAN PT CAMPINA ICE CREAM INDUSTRY TBK TAHUN 2020–2024 Saragi, Dame Ria Rananta; Sianipar, Lasma Lenida Rosinta; Samosir, Anita Tresia; Siahaan, Junaidi
Jurnal Ekonomi dan Bisnis (EK&BI) Vol 8 No 1 (2025)
Publisher : Politeknik Bisnis Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37600/ek&bi.v8i1.2372

Abstract

This research aims to assess the financial performance of PT Campina Ice Cream Industry Tbk during the 2020–2024 period using profitability and liquidity ratios. The profitability ratios examined in this study include Return on Assets (ROA), Return on Equity (ROE), and Net Profit Margin (NPM), while the liquidity ratios consist of the Current Ratio and Quick Ratio. A quantitative descriptive approach was applied using financial report data from the company. The findings reveal a notable improvement in profitability from 2021 to 2023, followed by a decline in 2024, indicating reduced efficiency in generating profits. In terms of liquidity, the company exhibited a strong position at the start of the period, but experienced a sharp decrease, particularly in the Quick Ratio, during the final two years—implying potential short-term financial challenges. Overall, the company has shown signs of post-pandemic recovery and growth, although better working capital management is necessary to ensure long-term financial stability.
Co-Authors Lasma Lenida Rosinta Sianipar Samosir, Anita Tresia Saragi, Dame Ria Rananta Syahputra, Riyan