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Anik Kustirini, Anik
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Inovasi Teknologi SCGC (Self Compacting Geopolymer Concrete) Sebagai Material Berkelanjutan Anik Kustirini; Dhamang Budi Cahyono; Bambang Purnijanto; Diah Setyati Budiningrum
Teras Jurnal : Jurnal Teknik Sipil Vol. 16 No. 1 (2026): Teras Jurnal
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i1.1334

Abstract

Abstrak   Beton geopolimer merupakan beton tanpa semen sebagai bahan pengikat, dipandang sebagai solusi mengatasi pemanasan global akibat produksi semen portland dan alternatif pengganti beton konvensional. Beton geopolimer segar memiliki kekentalan kaku yang tidak workable, padahal workability sangat dibutuhkan dalam proses pengecoran di lapangan. Untuk mengatasi masalah ini, dikembangkan inovasi Self Compacting Concrete (SCC) yang dapat memadat sendiri tanpa alat pemadat. Beberapa metode untuk mendapatkan sifat self compacting meliputi pengaturan kadar agregat, rasio air, dan penggunaan superplasticizer. Penambahan superplasticizer membuat geopolimer lebih workable dengan setting time lebih lama. Pengujian menggunakan slump flow, v funnel, dan box test. Penelitian ini menganalisis kinerja Self Compacting Geopolymer Concrete (SCGC) menggunakan fly ash PLTU Tanjungjati B sebagai pengganti semen. Hasil pengujian menunjukkan campuran berhasil diformulasikan sebagai SCGC berperforma tinggi dengan keseimbangan sangat baik antara fluiditas, stabilitas, dan kemampuan melewati celah sempit. Beton ini efektif untuk aplikasi pada elemen struktur dengan geometri rumit dan penulangan padat, berpotensi meningkatkan efisiensi konstruksi, mengurangi pemadatan mekanis, dan menjamin kepadatan optimal di seluruh struktur.   Kata kunci: SCGC, Fly ash, Slump Flow, V Funnel, Box test   Abstract   Geopolymer concrete is concrete without cement as a binding material, seen as a solution to global warming caused by Portland cement production and an alternative to conventional concrete. Fresh geopolymer concrete has a stiff consistency that is not workable, even though workability is very much needed in the casting process in the field. To overcome this problem, Self Compacting Concrete (SCC) innovation has been developed, which can compact itself without compaction tools. Several methods to obtain self-compacting properties include adjusting the aggregate content, water ratio, and the use of superplasticizers. The addition of superplasticizers makes geopolymers more workable with a longer setting time. Testing was carried out using slump flow, V-funnel, and box tests. This study analyzes the performance of Self-Compacting Geopolymer Concrete (SCGC) using fly ash from the Tanjungjati B power plant as a cement substitute. The test results show that the mixture was successfully formulated as high-performance SCGC with an excellent balance between fluidity, stability, and the ability to pass through narrow gaps. This concrete is effective for applications in structural elements with complex geometries and dense reinforcement, potentially increasing construction efficiency, reducing mechanical compaction, and ensuring optimal density throughout the structure.   Keywords: SCGC, Slump Flow, V-Funnel, Box Test
Modulus Elastisitas Beton Geopolimer Berbasis Fly ash PLTU Tanjungjati B Jepara Anik Kustirini; Edy Susilo; Trias Widorini; Bambang Purnijanto
Teknika Vol. 19 No. 1 (2024): Maret
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/teknika.v19i1.8748

Abstract

Beton geopolimer adalah beton yang dibuat tanpa menggunakan semen. Sebaliknya, fly ash—bahan sisa pembakaran batu bara di pembangkit listrik tenaga uap—dimanfaatkan (PLTU). Pada penelitian ini fly ash dari PLTU Tanjungjati B Jepara digunakan untuk menguji modulus elastisitas beton geopolimer sehingga diperoleh pemahaman yang jelas mengenai sifat-sifatnya. Tiga benda uji silinder 15/30 digunakan untuk menguji modulus elastisitas beton. Rata-rata modulus elastisitas beton geopolimer umur 28 hari sebesar 20.560,797 MPa. Model modulus elastisitas dan kuat tekan beton geopolimer dengan persamaan Ec = 12761 (f’c) 0,4657 diperoleh dari hasil regresi daya. Validasi dilakukan dengan korelasi, angka R2 = 0,9944 mendekati satu, artinya hubungan kuat tekan dengan modulus elastisitas sangat kuat atau valid. Nilai modulus elastisitas hasil laboratorium berbeda 0,338% dengan nilai modulus elastisitas SNI dan selisih nilai modulus elastisitas Hukum Hookes sebesar 0,018%. Grafik hasil laboratorium dan Hooke berimpit
Numerical and Field-Based Analysis of Soil Nailing for Slope Stability Adolf Situmorang; Anik Kustirini; Kukuh Wisnuaji Widiatmoko
Teknika Vol. 20 No. 2 (2025): Oktober
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/teknika.v20i2.12918

Abstract

Landslide occurrences in Indonesia are predominantly associated with soft soils and inadequate drainage conditions during periods of high-intensity rainfall. Nevertheless, the country’s diverse geological settings pose significant challenges for implementing effective landslide mitigation strategies, particularly as most existing studies are concentrated on specific islands, each characterized by distinct geotechnical and geomorphological conditions. In certain areas of Flores Island, landslides have been observed at relatively shallow depths and steep slope angles, often occurring in remote locations. Additionally, the tectonic setting of Flores Island—surrounded by multiple active seismic sources—increases the susceptibility to both rockfalls and earthquake-induced landslides. Soil nailing has emerged as a promising stabilization technique in such conditions, particularly where subsurface materials exhibit high resistance to penetration (N-SPT > 60). Despite the steep terrain, the technique remains viable due to its adaptability and minimal disturbance to the existing slope geometry. Stability analyses conducted using both the FEM and LEM under static loading conditions indicate that soil nailing is effective in reinforcing the slope without inducing significant deformation. Furthermore, the reinforced slopes demonstrate sufficient stability under seismic loading, satisfying the design earthquake criteria stipulated by the Indonesian Standard. 
Edukasi Pemasangan Sarana Air Minum Di Wilayah Desa Kemambang Kecamatan Banyubiru Kabupaten Semarang Son Haji; Bambang Purnijanto; Kusrin; Anik Kustirini; Kukuh Wisnuaji Widiatmoko
Jurnal Pengabdian KOLABORATIF Vol. 4 No. 1 (2026): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/kolaboratif.v4i1.13277

Abstract

This community service program was implemented to address the limited technical knowledge and skills of residents in Kemambang Village regarding the provision of safe drinking water, while also strengthening local water management institutions. The activities were conducted using a participatory approach that combined the ABCD method, demonstrations, practices, and the application of appropriate technology. Evaluation results show an increase in community knowledge from a score of 3.13 to 4.60, and an improvement in technical skills from 2.68 to 4.40 after the training. The establishment of the Village Water Management Group (KPAD) indicates growing social capacity and collective commitment toward sustainable water management. The program also generated economic benefits through the adoption of simple, low-cost filtration systems that reduced household expenses. Overall, the program successfully enhanced community capacity in managing safe drinking water and supported village self-reliance in water service provision.
Sosialisasi Potensi Longsor Di Kecamatan Gunungpati Kota Semarang Sebagai Upaya Peningkatan Kesiapsiagaan Masyarakat Adolf Situmorang; Anik Kustirini; Kusrin Kusrin; Agus Muldiyanto; Kukuh Wisnuaji Widiatmoko
Jurnal Pengabdian KOLABORATIF Vol. 4 No. 2 (2026): July
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/kolaboratif.v4i2.14390

Abstract

Gunungpati District is characterized by geomorphological conditions dominated by hilly terrain with moderate to steep slopes. These topographic features, combined with the local geological and hydrological conditions, increase the area's susceptibility to landslides. This Community Service Program (PKM) aimed to enhance community knowledge and preparedness regarding potential landslide hazards in Gunungpati District through a community-based awareness and education program. The program employed educational lectures, interactive discussions, and the distribution of educational materials to residents. The activities were held at the village hall and involved 30 participants from several villages in Gunungpati District. The results demonstrated a significant improvement in participants' understanding of the primary causes of landslides, early warning indicators, and appropriate mitigation measures that can be implemented at the community level. The participants' average knowledge score increased by 52%, rising from 33.75% before the program to 85.75% after its completion. These findings indicate that integrating public awareness sessions with interactive discussions, case study presentations, and visual learning media effectively enhances community understanding of landslide hazards and corresponding mitigation strategies. Consequently, this program provides a practical foundation for strengthening community resilience to landslide disasters in Gunungpati District.
Co-Authors Adolf Situmorang Adolf Situmorang Adolf Situmorang Adolf Situmorang afrida ranu l Agus Muldiyanto, Agus Ahmad Hakim Bintang Kuncoro Bagus Acung Billahi Bambang Purnijanto Bambang Tutuko Budiningrum, Dyah Setyati Cahyono, Dhamang Budi Chatarina Umbul Wahyuni Dhamang Budi Cahyono Dhamang Budi Cahyono Diah Rahmawati Diah Setyati Budiningrum Dyah Setyati Budiningrum Edy Susilo Edy Susilo, Edy Galih Widyarini galuh cahyo n.w Kukuh Wisnuaji Widiatmoko Kusrin Kusrin Kusrin l, afrida ranu Mahasukma, Devinda Mentari S Sitorus n.w, galuh cahyo pratiwi, yesina intan Purnijanto, Bambang Purnijanto, Bambang Purwanti, Hani Purwanto Purwanto Purwanto Purwanto RA, Andi Ainun Zuqny Nurin Safrinal Sofaniadi Setyati Budiningrum, Diah Son Haji Sulistyaningsih, Ainaya Suwiyono, Timbul Catur Talitha Zhafira Talitha Zhafira Timbul Catur Suwiyono Trias Widorini Utama, Tegar Yogha yesina intan pratiwi