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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur U Karst BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Nursandah, Fauzie
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Utilization of Plastic Bottle Waste as Material for Making Sustainable Cement-Less Aesthetic Paving Blocks Karisma, Dwifi Aprillia; Nursandah, Fauzie; Rahmawaty, Fitry
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 19 No. 2 (2023): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v19i2.67250

Abstract

Plastic is a key ingredient in many products around the world, but its existence has caused serious problems due to the buildup of waste it produces. The construction industry is one of the sectors that can play a role in the utilization of plastic waste. One of them is in the production of paving blocks. This study aims to combine aesthetic aspects and environmental attractiveness in paving blocks without sustainable cement.  An experimental method was chosen to develop an alternative to making sustainable paving blocks without the use of cement. Variations used to start from 20% PET: 80% aggregate, 25% PET: 75% aggregate, 30% PET: 70% aggregate, 35% PET: 65% aggregate, 40% PET: 60% aggregate. The aggregates used are sand and stone ash. Physical and mechanical qualities of paving blocks, such as compressive strength, absorption is carried out to determine the quality of paving blocks. The aesthetic aspect is also in focus by carrying out the concept of "glow in the dark". The results of physical and mechanical quality evaluation show that this paving block has adequate performance. The ratio of 20% PET and 80% sand reached paving category C with a compressive strength of 19.65 MPa, while the mixture with a ratio of 20% PET and 80% stone ash reached paving category B with a compressive strength of 24.20 MPa. This paving can be applied in the use of parks, pedestrian to parking lots. This suggests that the use of PET in the mixture can achieve sufficient strength in the paving industry. However, higher water absorption in mixtures with a higher percentage of PET needs to be taken into consideration. In addition, morphological and structural analysis reveals the presence of pores in the paving block that can affect the overall strength. These pores are caused by uneven melting of PET plastic during the manufacturing process. Based on the LCC evaluation, a higher economic value was obtained, but the resulting environmental impact made the product worthy of being one of the solutions to reduce plastic waste.
Life Cycle Assessment (LCA) Paving Block tanpa Semen menggunakan Limbah Botol Plastik Karisma, Dwifi Aprillia; Nursandah, Fauzie; Rahmawaty, Fitry
Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri 2023: Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Industri konstruksi menghadapi tantangan besar untuk berinovasi guna meningkatkan keberlanjutan. Berbagai inovasi material konstruksi telah muncul sebagai respons terhadap kebutuhan akan keberlanjutan. Penggunaan material daur ulang, seperti mengubah limbah menjadi sumber daya konstruksi, telah menjadi fokus yang sangat penting dalam upaya untuk mengurangi dampak lingkungan industri konstruksi. Penelitian ini mengkaji dampak lingkungan dari produksi paving block konvensional dan paving block plastik tanpa semen yang memanfaatkan limbah plastik PET sebagai bahan baku utama. Metode Life Cycle Assessment (LCA) digunakan untuk mengevaluasi dampak dari tahap produksi hingga pembuangan paving block. Pengolahan data untuk menganalisis dampak lingkungan dilakukan menggunakan perangkat lunak SimaPro 9.0.0.47. Hasil analisis menunjukkan bahwa paving block konvensional memiliki dampak lingkungan yang lebih rendah pada beberapa kategori, termasuk carcinogens, radiation, ecotoxicity, dan minerals, dibandingkan dengan paving block plastik. Namun, paving block plastik menunjukkan kinerja lebih baik pada aspek seperti Resp organics, Resp inorganics, climate change, ozone layer, acidification, land use, dan fossil fuels.
Statistical Validation of 2% Lignosulfonate as a Sustainable Stabilizer for Expansive Clay Rivianto, Arif; Candra, Agata Iwan; Nursandah, Fauzie; Mustofa, Imam
UKaRsT Vol. 9 No. 1 (2025): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v9i1.6594

Abstract

Expansive clay soils undergo volumetric changes due to fluctuations in moisture content, which can cause structural damage to foundations, pavements, and embankments. Traditional stabilization methods, such as cement and lime, are effective but have a significant environmental impact, highlighting the need for more environmentally friendly alternatives. Lignosulfonate (LS), an organic stabilizer derived from industrial by-products, offers a more sustainable approach to improving soil strength and stability. This study evaluates the effect of 2% lignosulfonate on the unconfined compressive strength (UCS) of expansive clays. The research method involved mixing LS at 2% of the dry weight of the soil into the expansive clay (CL-ML) and conducting UCS tests on three untreated (control) samples and six treated samples. Statistical analysis was used to assess the significance of the differences between the two groups. Results show that the UCS increased from 236.29 kPa in the control group to 291.49 kPa in the treated group, reflecting a 23.37% improvement. Poisson's ratio decreased from 0.300 to 0.200, indicating reduced lateral deformation and enhanced soil stiffness, which improves the bearing capacity and stability of structures built on it. The UCS values ​​were observed to be consistent supported by low standard deviation. The study highlights the critical role of adequate sample replication and control over operational variables such as moisture content, compaction, and LS dispersion to ensure reliable and reproducible stabilization outcomes. This study strengthens the empirical basis for the application of LS as a sustainable and environmentally friendly stabilizer for expansive clays.
Efektivitas Konfigurasi Perkuatan Ferosemen terhadap Reduksi Tegangan Tarik Maksimum Struktur Rumah Sederhana Tak Terkekang Kuswiantoro, Mahendra Septa; Karisma, Dwifi Aprillia; Nursandah, Fauzie
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 13 No 2 (2025): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (July 2025)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v13i2.11034

Abstract

homes, especially those without adequate structural components, known as un-engineered houses. These houses rely solely on brick masonry walls as load-bearing elements and are unable to effectively resist seismic forces. In Blitar Regency, many homes are constructed without technical planning, relying only on brickwork for structural support. This situation highlights the need for economical reinforcement technology suitable for simple houses owned by low-income communities. This study aims to determine the most effective critical reinforcement design using a ferrocement layer on the behavior of simple house structures with unconfined brick walls. Numerical simulations were performed using Time History Analysis, with variations in earthquake intensity of 30%, 60%, 100%, and 150%, and ferrocement reinforcement widths of 300, 400, 500, and 600 mm. The D2 reinforcement model proved to be the most effective, showing a strength reduction ratio close to the allowable critical limit of 0.79. The analysis also indicates that wider reinforcement increases the building’s strength but decreases material use efficiency. These findings provide important insights into balancing structural performance and economical material utilization for reinforcing un-engineered masonry homes vulnerable to earthquake damage.
Co-Authors Agata Iwan Candra Dwifi Aprillia Karisma Fitry Rahmawaty Imam Mustofa Kuswiantoro, Mahendra Septa Rivianto, Arif