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All Journal Sultra Civil Engineering Journal (SCiEJ)
Arsyad, Febriansyah
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Civil Engineering, Building, Construction & Architecture Transportation

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Pengaruh Substitusi Abu Sekam Padi terhadap Kuat Tekan dan Workability Beton Self-Compacting Concrete (SCC) sebagai Upaya Pemanfaatan Limbah Ramah Lingkungan Hasir, Hasir; Simatupang, Minson; Mokui, Hasmina Tari; Arsyad, Febriansyah; Alson, Muh Wonua Bhakti; Pratiwi, Nanda Ayu
Sultra Civil Engineering Journal (SCiEJ) Vol 6 No 2 (2025): Sultra Civil Engineering Journal (SCiEJ)
Publisher : Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54297/sciej.v6i2.1322

Abstract

The increasing concern for environmental sustainability has prompted innovations in the construction industry, particularly through the utilization of agricultural waste as supplementary cementitious materials. This research examines how replacing cement with rice husk ash (RHA) influences the compressive strength and workability of Self-Compacting Concrete (SCC). A comparative experimental approach was used, with Portland Composite Cement (PCC) serving as the primary binder and RHA added as a partial cement substitute at proportions of 2.5%, 5%, and 10% by weight. Prior to developing the mix design, the physical and mechanical characteristics of the aggregates were assessed following Indonesian National Standards (SNI). The compressive strength of cylindrical specimens (15 cm × 30 cm) was measured at 14 and 28 days of curing. The findings show that replacing 5% of the cement with RHA yielded the greatest compressive strength, reaching 35.7 MPa at 28 days, exceeding the strength of the control mix and other replacement levels. This enhancement is attributed to the pozzolanic activity of the amorphous silica in RHA, which improves the concrete’s microstructure and decreases its porosity. However, exceeding 5% replacement leads to reduced performance due to excessive dilution of cementitious content. Therefore, rice husk ash can be effectively utilized as an eco-friendly cement replacement up to an optimal proportion of 5%, supporting the development of sustainable construction materials in Indonesia
Study Of Concrete Mixture Using Sea Sand With Fresh Water and Sea Water Cure Arsyad, Febriansyah; Lakawa, Irwan; Ilham, Vickky Anggara; Hakiman, Hakiman
Sultra Civil Engineering Journal (SCiEJ) Vol 4 No 1 (2023): Sultra Civil Engineering Journal (SCiEJ)
Publisher : Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54297/sciej.v4i1.459

Abstract

The purpose of this study was to (1) analyze the characteristics of fresh concrete mixed with sea sand (2) to analyze the compressive strength of sea sand concrete with fresh water and sea water curing. In this study, the specimens used were 21 cylinders with a job mix design plan of f'c 25 MPa with a curing duration of 7 days, 14 days, and 28 days. At the age of 7 and 14 days the compressive strength of fresh water curing was 30.29 MPa and 33.12 MPa higher than seawater curing 29.02 MPa and 32.13 MPa, while at 28 days the compressive strength of seawater curing was 37. 08 MPa compared to fresh water curing of 33.97 MPa. Sea sand concrete has a very good quality compared to normal concrete and sea sand can be used in construction projects by taking into account the specifications in accordance with the Indonesian National Standard (SNI).
Co-Authors Alson, Muh Wonua Bhakti Hakiman, Hakiman Hasir Hasir, Hasir Hasmina Tari Mokui Ilham, Vickky Anggara Lakawa, Irwan Pratiwi, Nanda Ayu Simatupang, Minson