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Pengaruh Substitusi Pecahan Limbah Keramik terhadap Kekuatan Beton K-250 Pramesta Armanisag Pangestuti; Agustinus Sungsang Nana Patria; Ade Sovia Yahya
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 4 No. 2 (2026): April : Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Si
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v4i2.1520

Abstract

Ceramic waste can be utilized as an alternative construction material to reduce solid waste accumulation and the consumption of natural aggregates. This study aimed to evaluate the effects of ceramic fragments as a partial replacement for coarse aggregate on the slump, unit weight, and compressive strength of K-250 concrete. A laboratory experimental method was applied using 15 × 15 × 15 cm cube specimens with substitution levels of 0%, 5%, 10%, 15%, and 20%. Each mixture consisted of six specimens, giving a total of 30 cubes. The concrete mixtures were designed according to SNI 03-2834-2000 with a water–cement ratio of 0.49 and tested at 7 and 28 days. The results showed that the slump decreased from 7.5 cm in normal concrete to 6.5 cm at the 15% and 20% substitutions. The unit weight declined from 2.440 to 2.284 g/cm³ at the 20% level. The 28-day compressive strengths were 379.50, 340.20, 311.80, 330.10, and 330.60 kg/cm², respectively. Although all mixtures exceeded the K-250 target, the 5% substitution provided the best performance among the ceramic-containing mixtures. Ceramic fragments may therefore be used in limited proportions as coarse aggregate substitutes, provided that adequate quality control is applied.
Analisis Pengaruh Variasi Bentuk Shear Wall terhadap Perilaku Struktur Gedung Bertingkat Pramesta Armanisag Pangestuti; Agustinus Sungsang Nana Patria; Adam Miskah
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 4 No. 3 (2026): Juli: Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipi
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v4i3.1519

Abstract

The development of multistory buildings in earthquake-prone regions requires structural systems capable of limiting lateral displacement and maintaining stability. Shear walls are commonly used to improve lateral stiffness, but their effectiveness depends on cross-sectional shape. This study evaluates the effect of shear wall shape variations on an eight-story reinforced concrete office building and identifies the most effective configuration based on natural period, interstory drift, base shear, internal forces, and structural safety. The building measures 18 × 30 m, has a height of 32 m, and was modeled three-dimensionally using ETABS. Five models were compared: a structure without shear walls and structures with C-shaped, IWF-shaped, I-shaped, and L-shaped shear walls. All models used identical geometry, materials, loading, and seismic parameters in accordance with SNI 1726:2019 and SNI 2847:2019. The results show that Model 1 has the longest period, Model 2 produces the largest drift in the X direction, and Model 3 provides the smallest drift but experiences overstress in the coupling beam. Model 5 causes high internal-force concentration in the beams. Model 4, with an I-shaped shear wall, demonstrates the most balanced performance because it satisfies the allowable drift limit, provides uniform stiffness, controls internal forces, and shows no overstressed elements.