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Effectiveness of Different Configurations of Ferrocement Retrofitting for Seismic Protection of Confined Masonry: A Numerical Study Habieb, Ahmad B.; Hidayat, Muhammad R.; Sutrisno, Wahyuniarsih; Kandymov, Nurmurat; Milani, Gabriele
Civil Engineering Journal Vol 10, No 9 (2024): September
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2024-010-09-02

A ferrocement layer, which consists of a wire mesh and cement mortar, is a popular retrofitting method for existing structural elements, particularly wall or slab panels. This paper presents a study on the effectiveness of different configurations of ferrocement for seismic retrofitting of confined masonry through finite element analysis. The masonry panel was modeled using expanded brick-unit elements, where the element was expanded in size by as much as half of the mortar thickness, and an interacting zero-thickness interface was applied to mimic the elastic-plastic and damage behavior during tension, shear, and compression. The concrete damage plasticity (CDP) model was used to model the confining reinforced concrete frame and overlay mortar in the ferrocement layer, and the reinforcing bars and wire mesh were modeled using elastic-plastic behavior. In the present numerical study, nine models were subjected to cyclic and pushover shear test simulations, considering the effects of the number of ferrocement layers and the wire mesh orientation. The volumetric ratio of the wire mesh to the masonry (ρwm) ranged from 0.48% to 1.92%, whereas the ratio of the mortar overlay to the masonry (ρmo) varies from 10.42% to 41.66%. Based on the increase in the lateral strength, the model with the largest volume of the ferrocement layer exhibited the largest increase in strength. However, the most cost-effective retrofitting configuration was presented by model DS-1-45, in which a single layer of ferrocement was applied on both sides of the wall using 45° of wire mesh orientation. The DS-1-45 model provided a lateral strength increase of more than 6 times compared to the original unreinforced model. Doi: 10.28991/CEJ-2024-010-09-02 Full Text: PDF

Pembuatan Paving Block, Batako, dan Kusen dari Material Padat Akibat Erupsi Gunung Semeru Sebagai Bahan Baku Pembangunan Rumah Masyarakat Terdampak Pratiwi, Vania Mitha; Kusumadewi, Tri Vicca; Purwaningsih, Hariyati; Sutrisno, Wahyuniarsih; Kurniawan, Budi Agung; Widyastuti, Widyastuti; Fajarin, Rindang; Wibisono, Alvian Toto; Noerochim, Lukman
Sewagati Vol 9 No 3 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i3.676

Material padatan yang keluar ketika erupsi Gunung Semeru yang terjadi pada akhir tahun 2021 lalu banyak ditemukan di Desa Sumberwuluh, Kec. Candipuro, Kab. Lumajang. Material padat/pasir yang diambil dari lokasi bekas erupsi telah diteliti dan didapat kandungan terbesarnya yaitu Al 7,6 (Al2O3), Si 25 (SiO2), Ca 16,1 (CaO), Fe 43,5 (Fe2O3) (hasil uji XRF pada tanah kasar). Material padat/pasir tersebut digunakan untuk membuat batako dan paving. Komposisi tersebut membuktikan bahwa material padat/pasir yang digunakan sebagai bahan dasar produksi batako, paving block, dan kusen di Desa Sumberwuluh mempunyai kualitas yang bagus dan dapat membuat bahan baku semakin keras dan kuat. Ketersediaan material padat yang bermutu dapat menjadi nilai jual lebih untuk dipasarkan ke luar Desa Sumberwuluh. Didapat hasil uji kuat tekan batako yang menunjukkan bahwa batako memiliki rata-rata tegangan hancur bruto rata-rata sebesar 46,44 Kg/cm2 dan tegangan hancur bruto rata-rata paving block sebesar 129,76 Kg/cm2. Batako dan paving produksi Tim KKN Abmas tergolong sebagai batako dengan mutu A2 dan paving dengan mutu C. Besarnya peluang penghasilan yang bisa didapatkan dari pemasaran melalui media sosial masih kurang dipahami oleh sebagian masyarakat. Maka dari itu, guna memberikan pandangan besarnya kesempatan berbisnis melalui media sosial untuk meningkatkan penghasilan warga, tim Kuliah Kerja Nyata dan Pengabdian kepada Masyarakat (KKN Abmas) telah mengadakan pelatihan Digital Marketing.

Peningkatan Mutu BATARU “Batako Lahar Dingin Gn. Semeru” sebagai Upaya Tindak Lanjut Permasalahan UMKM Batako di Lumajang dengan Penambahan Filler dan Zat Aditif Beserta Media Pemasarannya Pratiwi, Vania Mitha; Purwaningsih, Hariyati; Dewi, Tri Vicca Kusuma; Widyastuti, Widyastuti; Fajarin, Rindang; Nurahmi, Latifah; Sutrisno, Wahyuniarsih; Trisanti, Prida Novarita; Aristio, Andre Parvian
Sewagati Vol 9 No 2 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i2.1043

Pengabdian masyarakat mengenai mutu batako lahar dingin dilakukan sebagai upaya peningkatan UMKM batako lahar dingin masyarakat disekitar Gunung Semeru. Permasalahan yang terjadi adalah pemilihan komposisi batako dan pemasarannya yang kurang baik. Untuk mengatasi permasalahan tersebut, maka strategi yang dilakukan adalah dengan menambahkan filler dan zat aditif ke dalam batako untuk mendapatkan komposisi yang optimum. Filler dan zat aditif yang digunakan yaitu berupa abu bagasse, abu sekam padi, dan tempurung kelapa, alkasit, dan addibond. Sedangkan untuk membantu pemasaran batako lahar dingin dilakukan dengan pembuatan google business sehingga masyarakat dapat mengetahui lokasi pengrajin batako. Metode yang dilakukan yaitu pertama, persiapan rangkaian kegiatan pengabdian seperti survei lokasi, pelaksanaan kegiatan yaitu penentuan lokasi pengrajin, interview, penelitian batako, serta pembuatan google bussiness. Terakhir, sosialisasi mengenai hasil penelitian kepada masyarakat sekitar. Kegiatan pengabdian masyarakat ini telah selesai terlaksana dengan baik dan mendapatkan antusiasme dari masyarakat.

Analysis of Physical and Mechanical Behavior in Cement Treated Soil (CTS) with the Addition of Portland Composite Cement (PCC) and Lime (CaO) to Passive Constraints Ayu Dewadatta, Ni Wayan Amrita; Lestari, Laras Laila; Piscesa, Bambang; Sutrisno, Wahyuniarsih
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 4 No. 11 (2025): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v4i11.2845

This research aims to analyze the physical and mechanical behavior of soil stabilized with the addition of PCC cement and lime (CaO) as well as the application of passive confinement using a polymer layer reinforced with glass fiber (GFRP). Soil stabilization was carried out by mixing 8% cement and 4% lime based on the optimum mix design results. Soil specimens were compacted using the standard compaction method and tested at 28 days of age. Next, the test specimens were coated with 1, 2, and 3 layers of GFRP to examine the passive effect on compressive strength. The test results show that the addition of PCC cement and lime (CaO) can significantly increase soil strength. Mohr-Coulomb analysis shows cohesion values of 0.032 MPa; 0.046 MPa; and 0.115 MPa, as well as shear angles of 45.46°, 45.08°, and 44.99° for each number of GFRP layers. The application of GFRP as a passive restraint also provides a gradual increase in compressive strength according to the number of layers used. This study proves that the combination of soil stabilization using PCC cement, lime, and the gradual application of GFRP is effective in improving the physical and mechanical properties of the soil, particularly for construction needs that require high load-bearing capacity.

Shear Performance of ULCC and PCC: Experimental and Numerical Insights Using DIC and FEM Tajunnisa, Yuyun; Mansur, Moh Safii; Suprobo, Priyo; Apsari, Auliagitta K.; Sutrisno, Wahyuniarsih
Civil Engineering Journal Vol. 11 No. 8 (2025): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-08-011

This study investigates the shear behavior of reinforced concrete beams constructed with high-calcium fly ash-based Ultra-Low Carbon Concrete (ULCC) as a sustainable alternative to conventional Portland Cement Concrete (PCC). The objective is to assess ULCC’s structural performance under shear and its potential as a low-carbon substitute. Using a dry-mix method with dry activators, six beams (five ULCC, one PCC) of identical dimensions (150 × 250 × 1800 mm) were tested under four-point bending, with variations in shear reinforcement, flexural reinforcement, and shear span-to-depth (a/d) ratios. Digital Image Correlation (DIC) was employed to monitor crack propagation and strain development, while Finite Element Modeling (FEM) provided numerical validation. Results show that increasing shear reinforcement enhanced capacity by 12.05%, whereas higher (a/d) ratios decreased it by 22.63%; increased flexural reinforcement improved shear resistance by 31.27%. FEM closely matched experimental outcomes, with a load-deflection ratio of 1.01. ULCC outperformed PCC in shear capacity and exceeded ACI 318-19 predictions. The integration of DIC and FEM offers a comprehensive analysis framework, and the findings demonstrate ULCC’s viability as a structurally efficient, environmentally sustainable alternative for shear-critical applications.

Study of Mohr-Coulomb Parameters in Clay Soil with the Addition of PCC Cement (Portland Cement Composite) and Lime (CAO) Under PassiveConfinement of GFRP (Glass Fiber Reinforced Polymer) Ayu Dewadatta, Ni Wayan Amrita; Lestari, Laras Laila; Piscesa, Bambang; Sutrisno, Wahyuniarsih
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 4 No. 11 (2025): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v4i11.2845

This research aims to analyze the physical and mechanical behavior of soil stabilized with the addition of PCC cement and lime (CaO) as well as the application of passive confinement using a polymer layer reinforced with glass fiber (GFRP). Soil stabilization was carried out by mixing 8% cement and 4% lime based on the optimum mix design results. Soil specimens were compacted using the standard compaction method and tested at 28 days of age. Next, the test specimens were coated with 1, 2, and 3 layers of GFRP to examine the passive effect on compressive strength. The test results show that the addition of PCC cement and lime (CaO) can significantly increase soil strength. Mohr-Coulomb analysis shows cohesion values of 0.032 MPa; 0.046 MPa; and 0.115 MPa, as well as shear angles of 45.46°, 45.08°, and 44.99° for each number of GFRP layers. The application of GFRP as a passive restraint also provides a gradual increase in compressive strength according to the number of layers used. This study proves that the combination of soil stabilization using PCC cement, lime, and the gradual application of GFRP is effective in improving the physical and mechanical properties of the soil, particularly for construction needs that require high load-bearing capacity.

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