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Okviyani, Nur
Universitas Sulawesi Barat
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Dampak Variasi Skim Coat dan Foam Agent 1/60 Terhadap Produksi Bata Ringan Okviyani, Nur; J, Rahmat; Ridhayani, Irma; Sainuddin, Sainuddin; Fauzi Mahmuda, Ali; Nurdin, Amalia
BANDAR: JOURNAL OF CIVIL ENGINEERING Vol 7 No 1 (2025): Bandar: Journal of Civil Engineering
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/bjce.v7i1.4285

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh variasi SkimCoat dan foam agent 1/60 terhadap pembuatan bata ringan, pada penelitian kali ini dimana semen putih yang di gunakan di ganti dengan Scimcoat. Benda uji berupa kubus dengan ukuran 5 x 5 cm dengan 5 variasi dengan campuran foam agent 1/60 dimana foam agent 0%,25%,50%,75% dan 100% sama dengan jumlah semen, setiap variasi memiliki 18 sampel dengan volume kubus 0,13 cm3 dimana sekali pencampuran menggunakan 5 liter air dengan variasi campuran pasir sungai Mapilli, Menggunakan campuran air tawar dengan FA40 dimana pengganti semen adalah Scimcoat. Selanjutnya melakukan uji tekan umur 7,28,91 hari dengan masing-masing 3 sampel, dan electrical resisticity umur 28 dan 91 hari masing-masing 2 sampel. Hasil pengujian menunjukkan peningkatan nilai uji kuat tekan mencapai nilai optimum 22,21 Mpa dan masuk kategori rendah resiko terpapar korosi.
Numerical Investigation of Soft Ground Improvement beneath Road Embankments Using Prefabricated Vertical Drains: Insights from PLAXIS 2D Modeling Miftahulkhair, Muh; Ridhayani, Irma; Okviyani, Nur; Suryani, Herni; Dwi Fortuna, Ellyyni
BANDAR: JOURNAL OF CIVIL ENGINEERING Vol 7 No 2 (2025): Bandar: Journal of Civil Engineering
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/bjce.v7i2.5738

Abstract

Abstract Soft clay deposits often cause excessive settlement and instability in road embankments. This study investigates ground improvement using prefabricated vertical drains under staged embankment loading through finite element modeling in PLAXIS 2D. The analysis examines consolidation rate, settlement, pore water pressure dissipation, and safety performance for square and triangular drain layouts with spacings of 1.25 m and 1.50 m. Results show that vertical drains accelerate consolidation, reducing the time to reach 90 percent settlement from 8.3 years to less than 3 years, while improving overall embankment stability. The triangular 1.25 m configuration produced the most uniform deformation and fastest consolidation response. The study confirms that optimized drain geometry significantly enhances soft ground performance and provides a practical numerical framework for design applications in tropical regions.
Pengaruh Palm Oil Fuel Ash terhadap Kuat Tekan dan Daya Serap Air pada Bata Ringan Tipe CLC Amry Dasar; Dahlia Patah; Nur Okviyani; Michail Amin
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.3470

Abstract

Cellular lightweight concrete (CLC) blocks are a type of non-structural wall material that has the potential to reduce a building’s dead load; however, their use still faces technical challenges due to low compressive strength and high water absorption. Palm oil fuel ash (POFA) derived from oil palm biomass waste has the potential to be used as a partial cement substitute. This study aims to evaluate the effect of POFA as a partial cement substitute at levels of 0–30% on the compressive strength and water absorption of CLC lightweight bricks. POFA was ground twice using a disc mill with a No. 200 sieve. Cube specimens measuring 50×50×50 mm were tested at 7 and 28 days of age under normal curing and steam curing conditions. The results showed that a 10% POFA substitution yielded the best performance, with a compressive strength of 3.53 MPa under normal curing at 28 days and 3.57 MPa under steam curing at 28 days. This mixture also produced the lowest water absorption, namely 21.58% and 1.66% under the same conditions. The highest strength activity index was also achieved with a 10% POFA substitution. These findings indicate that the use of 10% POFA is suitable for producing low-cement CLC lightweight bricks with better mechanical and absorption performance for sustainable non-structural wall applications.
Penguatan literasi geologi lokal melalui pendekatan partisipatif dan teknologi drone untuk mitigasi bencana Herni Suryani; Sri Apriani Puji Lestari; Arnita Irianti; Nur Okviyani
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 10, No 3 (2026): June
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v10i3.39198

Abstract

AbstrakLiterasi geologi berperan penting dalam mendukung kesiapsiagaan masyarakat terhadap bencana, khususnya di wilayah pesisir yang rentan terhadap bahaya geologi. Namun, pemahaman masyarakat mengenai jenis batuan, bentang alam, dan keterkaitannya dengan potensi bencana masih relatif rendah. Kegiatan pengabdian kepada masyarakat ini bertujuan memperkuat literasi geologi melalui pendekatan partisipatif yang dipadukan dengan pemanfaatan teknologi drone sebagai media edukasi. Kegiatan dilaksanakan di Desa Padang, Kecamatan Campalagian, Kabupaten Polewali Mandar, dengan melibatkan sekitar 20 peserta dari Komunitas Pemuda Literasi dan Perjuangan (PULPEN). Metode yang digunakan meliputi studi pendahuluan, penyampaian materi, observasi lapangan, demonstrasi teknologi drone, serta evaluasi melalui pre-test dan exit survey. Hasil pre-test menunjukkan rendahnya pengetahuan awal peserta terkait konsep geologi dan mitigasi bencana. Sementara itu, exit survey menunjukkan respons positif peserta, dengan 94% menyatakan kegiatan bermanfaat, 81% memahami keterkaitan bentang alam dengan potensi bencana geologi, dan 88% memahami pentingnya mitigasi bencana berbasis kondisi geologi setempat. Kegiatan ini juga menghasilkan leaflet dan infografis edukatif yang dapat dimanfaatkan secara berkelanjutan oleh mitra. Kata kunci: literasi geologi; bentang alam; mitigasi bencana; pendekatan partisipatif; teknologi drone. AbstractGeological literacy plays an important role in supporting community preparedness for disasters, particularly in coastal areas vulnerable to geological hazards. However, public understanding of rock types, landforms, and their relationship to disaster risks remains limited. This community service program aimed to strengthen geological literacy through a participatory approach combined with drone technology as an educational medium. The program was conducted in Padang Village, Campalagian District, Polewali Mandar Regency, involving approximately 20 participants from the Youth Literacy and Struggle Community (PULPEN). The activities included a preliminary study, educational sessions, field observations, drone technology demonstrations, and evaluation through a pre-test and an exit survey. The pre-test results indicated limited initial knowledge of geological concepts and disaster mitigation among participants. Meanwhile, the exit survey revealed positive responses, with 94% considering the activity beneficial, 81% understanding the relationship between landforms and geological hazards, and 88% recognizing the importance of geology-based disaster mitigation. The program also produced educational leaflets and infographics that can be sustainably utilized by the community partner. Keywords: geological literacy; landscape; disaster mitigation; participatory approach; drone technology.
Performance Optimization of Biomass Fly Ash as a Partial Cement Replacement in Concrete Based on Compressive Strength, Sorptivity, and Half-Cell Potential Nur Okviyani; Yusman Yusman; Irma Ridhayani; Muhammad Isra; Akbar Indrawan Saudi; Ainun Jariah Hilal Anshary; Amalia Nurdin
EPI International Journal of Engineering Vol 9 No 1 (2026): Volume 9 Number 1, February 2026
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The use of biomass fly ash (BFA) as a supplementary cementitious material offers a practical approach to reducing cement consumption while enhancing concrete durability. This study evaluates the effect of BFA as a partial cement replacement on the mechanical and durability performance of concrete produced with river sand and freshwater. BFA was incorporated at replacement levels of 0%, 5%, 15%, and 25% by cement mass, with a constant water-to-binder ratio of 0.40. Compressive strength was tested at 7, 28, and 91 days, sorptivity was measured at 28 and 91 days, and the corrosion probability of embedded reinforcing steel was assessed using the Half-Cell Potential method from 7 to 91 days. The results show that BFA reduced early-age strength, especially at 15% and 25% replacement, due to the slower development of pozzolanic reactions. However, the later-age performance improved markedly. At 91 days, the mixture containing 25% BFA achieved the highest compressive strength of 36.46 MPa, representing a 27.48% increase over the control mixture. This mixture also produced the lowest sorptivity value of 0.91 mm, indicating reduced capillary water absorption. Half-Cell Potential results showed that all mixtures reached the low corrosion probability range at 91 days, with the 25% BFA mixture recording -59.13 mV. Overall, 25% BFA provided the best balance between compressive strength, water absorption resistance, and corrosion-related durability. Keywords: biomass fly ash; compressive strength; concrete durability; half-cell potential; sorptivity
Numerical Investigation of Soft Ground Improvement beneath Road Embankments Using Prefabricated Vertical Drains: Insights from PLAXIS 2D Modeling Muh Miftahulkhair; Irma Ridhayani; Nur Okviyani; Herni Suryani; Ellyyni Dwi Fortuna
BANDAR: JOURNAL OF CIVIL ENGINEERING Vol. 7 No. 2 (2025): Bandar: Journal of Civil Engineering
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/bjce.v7i2.5738

Abstract

Abstract Soft clay deposits often cause excessive settlement and instability in road embankments. This study investigates ground improvement using prefabricated vertical drains under staged embankment loading through finite element modeling in PLAXIS 2D. The analysis examines consolidation rate, settlement, pore water pressure dissipation, and safety performance for square and triangular drain layouts with spacings of 1.25 m and 1.50 m. Results show that vertical drains accelerate consolidation, reducing the time to reach 90 percent settlement from 8.3 years to less than 3 years, while improving overall embankment stability. The triangular 1.25 m configuration produced the most uniform deformation and fastest consolidation response. The study confirms that optimized drain geometry significantly enhances soft ground performance and provides a practical numerical framework for design applications in tropical regions.
Pemberdayaan Masyarakat Lokal: melalui Pelatihan Pembuatan Komposter dan Dampaknya untuk Ekowisata Berkelanjutan di Pamboborang Futri Adriana Aksar; Virda Eviyanti Deril; Sri Apriani Puji Lestari; Nur Okviyani; Sarmila Sarmila
Madani : Indonesian Journal of Civil Society Vol. 8 No. 1 (2026): Madani : Februari 2026
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/madani.v8i1.2921

Abstract

Organik waste management is a major challenge in developing ecotourism in Pamboborang Village, Majene Regency, West Sulawesi. This community service activity aimed to empower the local community, particularly the blacksmith group, through training in simple composter construction to support sustainable organik waste management. The applied methods included a one-day intensive workshop, one-month post-training mentoring, and pre-test and post-test evaluations using structured questionnaires. The training involved constructing composters using two lidded buckets, perforated PVC pipes, and a leachate tap. The results indicated a 70% increase in participants’ knowledge, with the highest improvement (40%) in technical aspects of composter making. Post-training monitoring showed that 80% of participants continued to use the composters after three months. This activity provided environmental benefits through a 40% reduction in organik waste and socio-economic benefits by increasing awareness of cleanliness and promoting compost utilization for local agriculture. The novelty of this program lies in its integration of technical training with a community-based mentoring system, which enhances the sustainability of ecotourism development in Pamboborang.  
Feasibility Study of Biomass Fly Ash as a Partial Cement Replacement in Mortar Cured in Seawater Dahlia Patah; Amry Dasar; Nur Okviyani; Apriansyah Apriansyah; Nurazuwa Md Noor
Borneo Engineering: Jurnal Teknik Sipil Volume 10 Nomor 1 Tahun 2026
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v10i1.717

Abstract

The high consumption of cement and the limited utilization of biomass combustion residues have highlighted the need for the development of more sustainable cement materials, particularly for construction in coastal areas. While biomass fly ash (BFA) has potential as a cement replacement material, information regarding the use of raw BFA, without pretreatment, in mortar cured in seawater remains limited. This study aims to evaluate the technical feasibility of BFA as a partial cement replacement in mortar, based on compressive strength, ultrasonic pulse velocity (UPV), water absorption, and strength activity index (SAI). BFA was used to replace cement at levels of 10%, 20%, and 30% by weight. Mortar mixtures were prepared with a water-to-cement ratio of 0.40, using tap water for mixing and seawater as the curing medium. Compressive strength was tested at 7, 28, and 91 days, while UPV and water absorption were tested at 28 and 91 days. The SAI values were calculated from the compressive strength results to assess the effectiveness of BFA as a cement replacement material. The results indicated that mortar performance was significantly influenced by the BFA substitution level. The mixture with 10% BFA exhibited the best performance, achieving a compressive strength of 32.62 MPa at 91 days, a UPV value of 3434 m/s, and water absorption of 4.80%. The mixture with 20% BFA still showed reasonably good performance, whereas the 30% BFA mixture led to a noticeable deterioration in mortar quality. The SAI results confirmed that 10% replacement was the most effective level. These findings indicate that raw BFA can be directly utilized as a partial cement replacement in mortar cured in seawater.
Co-Authors . Apriansyah A. Al'Faizah Ma'rief Abdul Affan Ahmad Qadri Ainun Jariah Hilal Anshary Akbar Indrawan Saudi Aldri Frinaldi Alwi, Almayana Amin, Michail Andi Sebrahim Apriani Ani Apriansyah apriansyah apriansyah Arnita Irianti Dahlia Dahlia Patah, Dahlia Dasar, Amry Dwi Fortuna, Ellyyni Ellyyni Dwi Fortuna Enni Tri Mahyuni Fauzi Mahmuda, Ali Futri Adriana Aksar Hedianto Herni Suryani Idris, Risma Nofianti Irma Ridhayani Irma Ridhayani J, Rahmat Lestari, Sri Apriani Puji Mahmuda, Ali Fauzi Manaf, Abdi Marwadi, Aji Miftahulkhair, Muh Muh Miftahulkhair Muhammad Isra Nurazuwa Md Noor Nurdin, Amalia Pabbarang, Ayub Rianto, Doli Jumat Ridhayani, Irma Sainuddin Sainuddin, Sainuddin Sarmila Sarmila Saudi, Akbar Saudi, Akbar Indrawan Tammabela, Irma Ridhayani A. Virda Eviyanti Deril Yusman Yusman Yusman Yusman, Yusman