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All Journal Rekayasa Sipil Jurnal Teknik Sipil Jurnal Permukiman Pena Teknik : Jurnal Ilmiah Ilmu-ilmu Teknik Bulletin of Civil Engineering Jurnal Rekayasa Teknik Sipil dan Lingkungan
Sulaiman, Lusman
Universitas Andi Djemma, Politeknik Pekerjaan Umum
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Transportation

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Journal : Rekayasa Sipil

 1 
Pengaruh Campuran Terhadap Kuat Tekan Beton Agregat Recycle Sulaiman, Lusman; Fisu, Amiruddin Akbar
Rekayasa Sipil Vol 14, No 1 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.01.5

Abstract

High consumption of freshwater and natural aggregate in concrete production becomes a matter of some concern that has been discussed recent years. An alternative partially or totally replacement for both materials is significant issue to reduce the negative impacts on the environment. Therefore, the aim of this research is to observe explicitly the effect of using seawater as mixing combined with recycled coarse aggregate and other materials to make new recycled aggregate concrete (RAC) under compressive load. The experimental laboratory test was conducted to total of thirty cylinders specimens of two to groups of mix design with w/c of 0.45. First was three types of percentage level of recycled coarse aggregate with targeted compressive strength of 25 MPa. The second was two types of mixtures and totally replaced by recycled coarse aggregate with targeted compressive strength of 30 MPa. Some specimens were mixed by seawater and all were placed in the freshwater-curing during some definite period of 7 and 28 days. The results show that the seawater and recycle aggregate were not significant influence to reduce the compression strength for first mix category, while the second mix category was having great influence up to 22% at 28 day. The reduction in compressive strength increases with an increase the targeted compressive load.
Prediksi Kuat Tekan Beton Agregat Recycle Campuran Air Laut dengan Schmidt Rebound Hammer Test Lusman Sulaiman; Ispianto; Muhammad Fahrizal Nur; Umar Hamzah Matottorang
Rekayasa Sipil Vol. 17 No. 1 (2023): Rekayasa Sipil Vol. 17 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2023.017.01.2

Abstract

Nowadays, using recyled aggregate and seawater as replacing natural aggregate and freshwater in mixing have been main priority to be a new concrete construction material. However, in order to asses their strength performance in fast and accurate, an appropriate method needs to be determined. Therefore, the aim of this research is to evaluate and predict the compressive strength of recycled aggregate concrete (RAC) mixed seawater using Schmidt rebound hammer test (SRH) and the result value was corresponded to concrete compressive testing machine (CTM) as control test of concrete specimens. Total 72 samples divided into three concrete mixtures were designed and prepared in cylindrical samples with w/c ratio of 0.45 and target compressive strength of 25 MPa. The first mixture was named natural aggregate concrete (NAC) or BAN as control concrete with 100% natural aggregate and fresh water. The second and third mixtures were named BAR-50 and BAR-100 with the BAN replacement of 50% and 100% RAC respectively. Seawater as mixing was performed in mixture concrete of BAR-50 and BAR-100. All sample mixtures were then wet cured at different age of 7, 28, 56 and 90 days in fresh water. The results show a good correlation between SRH and CTM tests with having high correlation of R2=0.9908. Also, a proposed mathematical model, equation 1, is created for quick calculation in predicting compressive strength of RCA. Therefore, the usage of SRH test is a realistic alternative to predict the compressive strength of recycled concrete with different percentage of replacement of NAC and mixing seawater.
Co-Authors Agustina, Yanida Amiruddin Akbar Fisu Chun, Pang-jo Citra Islami, Rizky Furukawa, Seiji Hastama Nugraha, Dimas Heston, Yudha Pracastino Islami, Rizky Citra Ispianto Mitao Ohga Mitao Ohga Muhammad Fahrizal Nur Ni Kadek Indriani Nurhidayah Nurhidayah Ohga, Mitao Pang-jo Chun Pang-Jo Chun Ramadhan, Muhammad Ernadi Rinto Suppa Sari Wahyuni Seiji Furukawa Tatsuya Yokogawa Umar Hamzah Matottorang Wulandari, Mariana Yokogawa, Tatsuya