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Analysis of Fly Ash and Sandblasting Waste Addition in Cementitious Composite Lawn Table Reinforced by Cocofiber and Wiremesh Widya Emilia Primaningtyas; Inshiro Auliyasari; Wiwik Dwi Pratiwi; Adristi Nisazarifa; Desrilia Nursyifaulkhair; Amanda Rosalina
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 4 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.4836

Abstract

Concrete technology has significantly advanced and remains an interesting research topic. The demand for cement usage rises significantly due to concrete usage in various sectors. Cement production leads to air pollution issues and causes a greenhouse effect, even in the modern filtration era. Fly ash is an industrial waste that has been identified as a viable substitute for cement due to its pozzolanic properties. Silica Sand is sandblasting waste, where added value is needed. This study investigates the effectiveness of fly ash substitution in the cement portion of cementitious composite materials as an effort to minimize cement usage. Using sandblasting waste is an effort to implement 3R activity (reduce, reuse, recycle) for maritime waste. Compressive and tensile tests were evaluated in the variation of fly ash substitution for cementitious composite reinforced by coco fiber and wiremesh model. The results show that a 40% fly ash substitution gives the highest compressive strength of 32.98 MPa and the tensile strength of 5.90 N/mm². The best model composition provides the increments of compressive and tensile strength compared to the control specimen at 43.60% and 12.60%, respectively. ANOVA tests confirmed the significance of the enhancing effect as the presence of fly ash, both for compressive and tensile strength. Additionally, static analysis simulations using Fusion360 software were performed and indicated that the cementitious composite lawn table prototype’s design is safe and has good formability, as a safety factor performed 2.26, exceeding the required value of 2.00. This result explicates that fly ash and waste materials can be effectively used in cementitious composites for practical applications.
Pengenalan Jenis Kapal Melalui Aktivitas Mewarnai Pada Anak Usia Dini di Taman Penitipan Anak Ridhani Anita Fajardini; Adristi Nisazarifa; Desrilia Nursyifaulkhair; Alief Nur Aisyi Maulidhia; Shultoni Mahardika; Immanuel Freddy Augustino
Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Vol. 9 No. 2 (2026): April 2026
Publisher : STMIK Royal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33330/jurdimas.v9i2.4163

Abstract

Abstract: Introducing the maritime world to early childhood is an approach to developing awareness and knowledge of the role of the sea as a natural resource in Indonesia. This can be accomplished, for instance, by introducing different types of ships and using coloring pages and images as an engaging way to learn. The activity was carried out in one of the day care located in Surabaya, with the par-ticipation of young children between the ages of 1 to 3 years old. The method applied in this community service activity is an educational method using a participatory approach. The activity was carried out in a number of phases, including preliminary observation and partner coordination, the creation of educational materials in the form of illustrations of various ship types, brief explanation of ship introduction, and ship coloring activities. Based on the activities that have been done, the children gave a positive response to learning and coloring activities. Using pictures and hands-on activities, the children tend to remember the shape and name of the ship that has been explained previously more easily. Coloring activities encourage fine-motor skills development and children's creativity. Keywords: coloring; early childhood; maritime; ship Abstrak: Pengenalan dunia maritim pada anak usia dini penting untuk menumbuhkan pengetahuan tentang peran laut sebagai sumber daya alam di Indonesia. Salah satu cara yang dapat dilakukan adalah melalui pengenalan jenis kapal dengan memanfaatkan media gambar dan aktivitas mewarnai sebagai bentuk pembelajaran visual yang menarik. Kegiatan pengabdian kepada masyarakat ini dilaksanakan di taman penitipan anak yang berlokasi di Surabaya dengan melibatkan anak usia dini berusia 1–3 tahun. Metode yang digunakan adalah metode edukatif dengan pendekatan partisipatif. Pelaksanaan kegiatan meliputi beberapa tahapan, yaitu observasi awal dan koordinasi dengan mitra, persiapan media pembelajaran berupa gambar jenis-jenis kapal, penyampaian materi pengenalan kapal secara singkat, serta aktivitas mewarnai gambar kapal. Hasil kegiatan menunjukkan bahwa anak-anak memberikan respons positif terhadap kegiatan yang dilakukan. Dengan bantuan media visual dan aktivitas langsung, anak-anak lebih mudah mengenali bentuk dan nama kapal. Selain itu, kegiatan mewarnai juga mendukung perkembangan motorik halus serta kreativitas anak. Kata kunci: anak usia dini; kapal; maritime; mewarnai