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Probokusumo
Universitas Sains Indonesia
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Analysis of the Effect of Damdex Addition to Concrete Mixture on Compressive Strength Endah Murtiana Sari; Probokusumo; Alfiya Rokhmah; Muhamad Dzaky Ashidqi; Rahmat; Thomas Junaedi
Engineering Science Letter Vol. 4 No. 03 (2025): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.esl.001420

Abstract

This study aims to determine the compressive strength and modulus of elasticity of concrete with the addition of Damdex variables to obtain the best composition. This research method is classified as quantitative research conducted at PT. Fresh Beton Indonesia Batching Plan BSD. In this study, research was conducted using two different concrete mixtures, namely 1 Pc: 2 S: 3 Gr and 1 Pc: 3 S: 2 Gr, each of which was supplemented with Damdex at concentrations of 0.0%, 0.2%, 0.4%, and 0.6%. According to the study's results, the highest compressive strength and modulus of elasticity were achieved in a concrete mixture of 1 Pc: 2 S: 3 Gr, with a variable addition of Damdex at 0.2%, resulting in a compressive strength of Fc 15.11 MPa and a modulus of elasticity of 18975.061 MPa. Meanwhile, the lowest compressive strength and modulus of elasticity results were obtained in the concrete mixture of 1 Pc: 2 S: 3 Gr with the variable addition of Damdex 0.6%, with a compressive strength of Fc 12.90 MPa and a modulus of elasticity of 17049.89 MPa. In the concrete mixture of 1 Pc: 3 S: 2 Gr, the compressive strength and modulus of elasticity were smaller compared to the concrete mixture of 1 Pc: 2 S: 3 Gr, with the highest results in the variable addition of Damdex 0.2%, with a compressive strength of Fc 9.89 MPa and a modulus of elasticity of 13846.477 MPa. Compressive strength and elastic modulus were measured at 28 days in accordance with SNI 1974:1990/2847 procedures. Among the tested mixtures, the 0.20% Damdex addition achieved the highest average compressive strength and elastic modulus. Within the tested conditions, 0.20% Damdex provided the best average performance; however, further work with larger samples and additional durability metrics is needed to confirm this trend.
Seminar Internasional sebagai Media Pengabdian Masyarakat dalam Penguatan Soft Skills Mahasiswa Teknik Industri di Era Industri Cerdas Probokusumo; Alfiya Rokhmah; Karyadi; Fajar Anzari; Asep Saepullah; Ririn Mulyani
Jurnal AbdiMas Ekonomi Terapan Vol. 4 No. 1 (2026): JURNAL ABDIMAS EKONOMI TERAPAN
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Universitas Selamat Sri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51792/128wxf22

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memperkuat soft skills mahasiswa Teknik Industri dalam menghadapi tuntutan era industri cerdas. Perkembangan pesat teknologi seperti kecerdasan buatan, automasi, dan digitalisasi menuntut lulusan perguruan tinggi tidak hanya memiliki kompetensi teknis, tetapi juga keterampilan non-teknis yang kuat, seperti komunikasi, kerja sama tim, kepemimpinan, berpikir kritis, dan kemampuan adaptasi. Kegiatan ini dilaksanakan melalui seminar internasional yang melibatkan akademisi dan praktisi industri dari dalam dan luar negeri. Pelaksanaan seminar dilakukan secara hybrid, yaitu luring dan live streaming, guna menjangkau peserta secara lebih luas. Hasil kegiatan menunjukkan adanya peningkatan pemahaman dan kesadaran peserta terhadap pentingnya penguatan soft skills sebagai bekal kesiapan kerja di dunia industri modern. Selain itu, kegiatan ini mendorong terjadinya pertukaran pengetahuan, perluasan jejaring akademik dan industri, serta motivasi mahasiswa untuk mengembangkan kompetensi non-akademik secara berkelanjutan. Dengan demikian, seminar internasional terbukti efektif sebagai media pengabdian masyarakat dalam mendukung pengembangan soft skills mahasiswa Teknik Industri.
Co-Authors Alfiya Rokhmah Asep Saepullah Fajar Anzari Karyadi Muhamad Dzaky Ashidqi Rahmat Rahmat Ririn Mulyani Sari, Endah Murtiana Thomas Junaedi