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Merdana, I Nyoman
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Journal : Jurnal Sains Teknologi dan Lingkungan (JSTL)

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Sifat Rheology dan Sifat Mekanis Beton Semi Ringan Batu Apung dengan Penggantian Sebagian Semen dengan Abu Sekam Padi Merdana, I Nyoman; Mahmud, Fathmah; Muttakin, Yasid Bastomi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 3 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i3.688

Abstract

From point view of earthquake engineering, the greater the mass of a structure, the greater the shear force imposed on the structures, and vice versa. To obtain a lightweight strong structure, lightweight concrete can be used instead of conventional concrete. Lightweight concrete can be made from various types of coarse aggregates, such as pumice. Smooth cracks occurred on the concrete surface due to hydration can be prevented by reducing cement content. Some amount of the cement can be replaced with natural pozzolanic which relatively easy and low-cost to produce. This research is to examine rheological and Mechanical properties of semi light-weight concrete due to partial replacement of cement content with Rice husk ash. The rice husk ash was prepared by burning Rice Husks in a furnace at a temperature of 700°±50°C for 4-hours. The chemical properties of both the Rice Husk Ash and Pumice was also tested in laboratory. In this study, the Compressive strength f’c and the Modulus of Elasticity of concrete Ec were tested with 15x30cm cylindrical specimens prepared according to SNI-1974-2011 tested at age of 28, 56 and 90 days. Based on a series of tests conducted, it was found that the Rheological properties of Semi-Light Pumice Concrete was greatly governed by the Rice Husk Ash. Furthermore, Partial cement replacement with Rice Husk Ash was potentially to be used with an optimum of 5% cement content. The compressive strength and Modulus of Elasticity of Semi Lightweight concrete are influenced by the age of the concrete testing.
The Sifat Mekanis Self Consolidating Concrete dengan Penggunaan Coconut Shell Ash Sebagai Bahan Tambah pada Semen Merdana, I Nyoman; Eniarti, Miko; Hajrin, Sofyan; Mahmud, Fathmah
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.813

Abstract

In civil construction work, conreting is often becoming difficult because of limited space on concrete mold or because of congestion of reinforcement. To overcome this case, self-consolidating concrete is frequently used. This type of concrete requires Slump flow, Passing ability and Segregation resistance requirements by using cement up to 600kg/m3. The current trend in concrete technology is utuilization of Pozzolan. This research discusses the behavior of the mechanical properties of self-consolidating concrete with coconut shell ash as additives. The Coconut shell ash is produced by burning coconut shells at a temperature of 800°C for approximately 4 hours. Five series of 15x30cm concrete cylinder are prepared tested with compression loads. It is found that the coconut shell ash applied as an additive greatly affects the properties of fresh concrete. The use of coconut shell ash also has an effect on the initial setting time and final setting time of cement as well. Furthermore, the compressive strength and Modulus of elasticity of self-consolidating concrete are influenced by the use of coconut shell ash as an additive for various test ages.
Co-Authors Agus Suroso Akbar, Bambang Putra Akmaluddin Akmaluddin Al Ziddan, M. Rasyid Aprilia, Uswatun Buan Anshari Darmawan, Ngakan Komang Indra Eko Pradjoko Eniarti, Miko Hajrin, Sofyan Hariyadi, Hariyadi Hasyim Heri Sulistiyono, Heri Humairoh Saidah I Dewa Gede Jaya Negara I Wayan Yasa, I Wayan Jumkhairatul, Lulu Karyawan, I Dewa Made Alit Mahendra, Made Mahmud, Fathmah Mahmud, Fatmah Maulana, Olan Muttakin, Yasid Bastomi Nabilla, Rahma Natasya, Rahma Dwi Ngudiyono Ngudiyono Ni Nyoman Kencanawati Nurmalasari Nurmalasari Pathurahman Pathurrahman Pathurrahman, Pathurrahman PRACOYO, ATAS Rahmasari, Alifiana Rahmayanti, Yulya Rawiana, Shofia Rofaida, Aryani Suharto Suharto Suparjo SUPRIYADI, ANID Suryawan Murtiadi, Suryawan Syumiarti, Syumiarti Tri Sulistyowati Ummah, Baiq Hizanatul Usman, Puspa Indah Rizkika Veithzal Rivai Zainal Winandar, Romi Ari Yusron Saadi