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Abstrak :
Penelitian ini menyelidiki dampak salinitas pada Beton Semen Komposit Portland. Dengan menggunakan empat kolam dengan tingkat salinitas yang bervariasi (0,2-3,5%) dan dua metode curing, penelitian ini mengeksplorasi perubahan sifat beton. Temuan utama meliputi: - Degradasi permukaan pada beton yang terpapar air laut. - Kekuatan tekan bervariasi dengan salinitas; lebih tinggi di kolam dengan salinitas 0,2-0,7%, lebih rendah di kolam dengan salinitas 3,0-3,5% dibandingkan kolam air tawar. - Kekuatan tarik awalnya lebih tinggi dalam kondisi salin tetapi menurun seiring waktu. - Permeabilitas menurun di lingkungan salin karena kristalisasi dalam pori-pori. - Tes Kecepatan Pulsa Ultrasonik menunjukkan struktur internal yang lebih solid pada sampel yang direndam secara periodik. Hasil-hasil ini memberikan wawasan tentang daya tahan beton dalam kondisi salin, menyoroti interaksi yang rumit antara salinitas, metode curing, dan sifat-sifat beton. ......This research investigates the impact of salinity on Portland Composite Cement Concrete. Using four pools with varying salinity levels (0.2-3.5%) and two curing methods, it explores changes in concrete properties. Key findings include: - Surface degradation in seawater-exposed concrete. - Compressive strength varies with salinity; higher in pools with 0.2-0.7% salinity, lower in 3.0-3.5% salinity compared to the freshwater pool. - Tensile strength initially higher in saline conditions but decreases over time. - Permeability decreases in saline environments due to crystallization in pores. - Ultrasonic Pulse Velocity tests show a more solid internal structure in periodically submerged samples. These results offer insights into concrete's durability in saline conditions, highlighting the nuanced interplay between salinity, curing methods, and concrete properties.

Abstrak :
Digital fabrication has been termed the “third industrial revolution”, and is promising to revolutionize many disciplines, including most recently the construction sector. Both academia and industry see immense promise in cementitious materials, which lend themselves well to additive manufacturing techniques for digital fabrication in construction. With this recent trend and high interest in this new research field, the 1st RILEM International Conference on Concrete and Digital Fabrication (Digital Concrete 2018) was organized. Since 2014, ETH Zurich has been host for the Swiss National Centre for Competence in Research (NCCR) for Digital Fabrication in Architecture, which is highly interdisciplinary and unique worldwide. In 2018, this NCCR opened the “DFAB House”, which incorporates many digital fabrication principles for architecture. It is also responsible for the 600 m2 Robotic Fabrication Lab and the first robotically built roof in the world. Held in tandem with Rob|Arch 2018, the leading conference for robotics in architecture, RILEM deemed it the right time to combine forces at this new conference, which will be the first large conference to feature the work of the recently created RILEM Technical Committee on Digital Fabrication with Cement-based Materials, among other leaders in this new field worldwide. This conference proceedings brings together papers that take into account the findings in this new area. Papers reflect the varying themes of the conference, including Materials, Processing, Structure, and Applications.