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All Journal Jurnal Talenta Sipil
Pramesta Armanisag Pangestuti
Program Studi Teknik Sipil, Fakultas Teknik, Universitas 17 Agustus 1945 Semarang
Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Pengaruh Abu Sekam Padi Sebagai Substitusi Abu Terbang (Fly ash) Terhadap Nilai Kuat Tekan Beton Geopolimer Agustinus Sungsang Nana Patria; Pramesta Armanisag Pangestuti; Hafidz Fachruldyarsah Basthomi
Jurnal Talenta Sipil Vol 9, No 2 (2026): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i2.1410

Abstract

Conventional concrete uses cement as the primary binding material, which produces significant carbon dioxide (CO₂) emissions and contributes to environmental problems. One environmentally friendly alternative is geopolymer concrete that utilizes pozzolanic materials such as fly ash and rice husk ash as binding materials. This study aims to determine the effect of rice husk ash as a substitution for fly ash on the compressive strength of geopolymer concrete. The research was conducted experimentally using cylindrical specimens with a diameter of 15 cm and a height of 30 cm, with rice husk ash variations of 0%, 5%, 10%, and 15% by weight of fly ash. Compressive strength testing was carried out at the ages of 7 and 28 days using a Compression Testing Machine (CTM). The results showed that increasing the percentage of rice husk ash tended to reduce the compressive strength of geopolymer concrete under both curing methods. Under ambient curing conditions, the 28-day compressive strength decreased from 15.85 MPa for GP0 to 5.66 MPa for GP15. Under oven curing conditions, the 28-day compressive strength decreased from 37.795 MPa for GP0 to 7.925 MPa for GP15. In addition, the observed crack patterns were cone and cone and split. These findings indicate that the use of rice husk ash as a partial substitution for fly ash affects the mechanical properties of geopolymer concrete, particularly its compressive strength.
Perbandingan Kolom Baja, Beton Bertulang, dan Komposit terhadap Perilaku dan Kekuatan Struktur Gedung Bertingkat Agustinus Sungsang Nana Patria; Pramesta Armanisag Pangestuti; David Gunarso Bambang Soewito
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1267

Abstract

Columns are one of the main structural elements that serve to transfer loads to the foundation. The choice of column material affects the diversity of the structural capacity of multi-story buildings. This study aims to compare steel, reinforced concrete, and composite columns in terms of the behavior and strength of multi-story buildings. This study uses a 7-story building model and a 1-story roof with 3 column model variations, including model 1 steel column, model 2 reinforced concrete column, and model 3 composite column. All three models use steel beams and bondeck floor slabs. The analysis was performed using ETABS v22.0 to compare structural behavior, inter-story shear forces, inter-story deflections, structural safety, and forces in beam and column elements. The results show that the reinforced concrete column model provides the best results for building behavior parameters, including period and translation, as well as internal force values in beams. The steel column model performs best for ground floor shear force parameters. The composite column model performed best in terms of inter-story deflection and internal force values in columns. In addition, no over-stressed structural elements were found in the three models. It was concluded that composite columns had the best structural capacity, combining concrete material that is strong against compression and steel material with high tensile strength to produce a stronger and more efficient structure. Recommendations for further research include using more varied building configurations and reviewing the economic aspects of structural work.
Co-Authors Agustinus Sungsang Nana Patria David Gunarso Bambang Soewito Hafidz Fachruldyarsah Basthomi