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All Journal Jurnal Rekayasa Sipil dan Desain Teras Jurnal Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung
Isneini, Mohd
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Civil Engineering, Building, Construction & Architecture Engineering Environmental Science

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Pengaruh Styrofoam sebagai Pengganti Sebagian Agregat Kasar terhadap Sifat Mekanik Self-compacting Concrete (SCC) Agustin, Cahyani Putri; Helmi, Masdar; Noorhidana, Vera Agustriana; Isneini, Mohd
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1284

Abstract

Abstrak   Styrofoam merupakan salah satu solusi untuk mengurangi beban mati pada struktur. Styrofoam dalam beton dapat berperan sebagai pengisi udara yang menciptakan void, sehingga styrofoam dapat menghasilkan beton yang lebih ringan. Penelitian ini dilakukan dengan mengganti sebagian agregat kasar dengan 10%, 20%, dan 30% butiran styrofoam pada SCC (Self-compacting Concrete). Hasil uji menunjukkan bahwa semakin tinggi kadar styrofoam, maka akan semakin rendah berat volume, kuat tekan, kuat tarik, kuat lentur, dan akan semakin tinggi daya serap air beton tersebut. Hasil optimum yang diperoleh berdasarkan pengujian kuat tekan, kuat tarik belah, dan kuat lentur ada pada beton dengan kadar styrofoam 10%, dengan hasil pengujian berturut-turut yaitu, 20,6227 MPa, 2,348 MPa, dan 4,3148 MPa, sedangkan untuk Penyerapan air tertinggi terjadi pada BS3 (styrofoam 30%), yang menghasilkan 12,4450% peningkatan daya serap.    Kata kunci: Styrofoam, berat volume, sifat mekanik, self compacting concrete (SCC)   Abstract   Styrofoam is one of the solutions to reduce dead loads on structures. Styrofoam in concrete can act as an air filler that creates voids, so styrofoam can produce lighter concrete. This research was carried out by replacing part of the coarse aggregate with 10%, 20%, and 30% styrofoam granules in SCC (Self-compacting Concrete). The test results show that the higher the styrofoam content, the lower the volume weight, compressive strength, tensile strength, bending strength, and the higher the water absorption of the concrete. The optimum results obtained based on the testing of compressive strength, tensile strength, and flexural strength were on concrete with a styrofoam content of 10%, with consecutive test results of 20.6227 MPa, 2.348 MPa, and 4.3148 MPa, while for the highest water absorption occurred in BS3 (30% styrofoam), which resulted in a 12.4450% increase in absorbency.    Kata kunci: Styrofoam, weight volume, mechanical properties, self-compacting concrete (SCC)
Pengaruh Penambahan Admixture Integral Waterproofing terhadap Kuat Tekan dan Penetrasi Air Beton Ready Mix Ilham Fajar Khairi; Helmi, Masdar; Isneini, Mohd; Niken, Chatarina; Agustriana, Vera
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.v16i1.1352

Abstract

Abstrak   Beton ready mix banyak digunakan pada proyek konstruksi berskala menengah hingga besar, terutama pada struktur yang terpapar air dan lingkungan agresif. Selain memenuhi kuat tekan rencana, beton juga dituntut memiliki kinerja kekedapan yang baik. Penelitian ini bertujuan mengevaluasi pengaruh penambahan admixture integral waterproofing terhadap kuat tekan dan penetrasi air pada beton ready mix proyek di Bakauheni, Lampung Selatan. Beton mutu rencana f’c 24,9 MPa diuji dalam tiga variasi: tanpa admixture, dengan admixture integral waterproofing, dan kombinasi admixture dengan finishing coating. Uji kuat tekan dilakukan pada umur 28 dan 56 hari dengan perendaman air tawar dan air laut, sedangkan uji penetrasi air dilakukan pada umur 28 hari. Analisis menggunakan metode deskriptif dan ANOVA (α = 5%). Hasil menunjukan seluruh variasi melampaui kuat tekan rencana dan admixture tidak berpengaruh signifikan terhadap kuat tekan. Namun, kombinasi admixture dan coating secara signifikan menurunkan penetrasi air sesuai SNI 03-2914-1992.   Kata kunci: Beton ready mix, admixture integral waterproofing, kuat tekan beton, penetrasi air, beton kedap air   Abstrack   Ready-mix concrete is widely used in medium- to large-scale construction projects, particularly for structures exposed to water and aggressive environments. In such conditions, concrete is required not only to achieve the specified compressive strength but also to provide adequate watertight performance. This study aims to evaluate the effect of integral waterproofing admixture on compressive strength and water penetration depth of ready-mix concrete used in an actual construction project in Bakauheni, Lampung Selatan. Concrete with a design strength of f’c 24.9 MPa was tested under three variations: without admixture, with integral waterproofing admixture, and with integral waterproofing admixture combined with a finishing coating. Compressive strength tests were conducted at 28 and 56 days under freshwater and seawater immersion, while water penetration tests were performed at 28 days. Data were analyzed using descriptive analysis and two-way ANOVA (α = 5%). Results indicate that all variations exceeded the design strength, and the admixture had no significant effect on compressive strength. However, the combination of admixture and coating significantly reduced water penetration depth in accordance with SNI 03-2914-1992.   Keywords: Ready-mix concrete, integral waterproofing admixture, compressive strength, water penetration, waterproof concrete
Co-Authors Agustin, Cahyani Putri Agustina, Nadya Agustriana, Vera Bayzoni Bayzoni, Bayzoni DWSBU, Chatarina Niken Fadzilah, Masrifatun Fikri Alami Halawa, Vince Nukrisman Hanafi, Goentur Permata Hasti Riakara Husni Helmi, Madar Ikromi, Muhammad Fauzan Ilham Fajar Khairi kartorono, suyadi Kurniawati, Risa Laksmi Irianti Mardhatillah, Siti Zalfa Masdar Helmi Mudia, Tutia Rahmayani Mustofa, Ragat Aji Niken, Chatarina Putra, Asyrofi Miranda Rahmanisa, Laila Indah Ramadhan, Vernady Napatino Ratna Widyawati Restiawan, Arie Dwie Rifai, Muhamad Ristama, M Alvany Veschonanda Sabila, Widya Lulu Amalia Sarifuddin, Lukman Sumantri, Devie Arisandy Surahman, Ridho Surya Sebayang Susanto Susanto Ulini'am, Adipati Syahidullah Vera Agustriana Noorhidana Wafi, Alvino Zahra, Ainaya Maudia Zikrillah, Daffa Zulva, Indana