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YOSI NOVIARI WIBOWO

DIPLOMA - Teknik Konstruksi Sipil

Asal Perguruan TinggiInstitut Teknologi Sepuluh Nopember
Nama ProdiTeknik Konstruksi Sipil
JenjangDIPLOMA
Semester6
Judul Karya Tulis“G-MARINE”: BETON RAMAH LINGKUNGAN BERBASIS HIGH-CALCIUM FLY ASH UNTUK ELEMEN STRUKTUR PELABUHAN
Topik Karya TulisKonstruksi/ Transportasi
Bidang Karya TulisIPA

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Ringkasan KTIIndonesia’s maritime region has an abundance of potential resources. In addition, it’s the region has high space and accessibility in the field of industrial transportation, so that the development of marine infrastructure has the potential to make Indonesia the axis of world maritime. Considering future challenges for marine construction, the use of Portland Cement as a construction material needs to be reduced because it contributes to global warming and to the effects of climate change. This is contrary to Goal 13 of the SDGs which aims to combat climate change.
The application of environmentally friendly materials such as geopolymer concrete is one solution to reduce the risk of global warming because it replaces the use of Portland Cement as a construction material. Along with the improvement in concrete technology, some researchers study fly ash as a geopolymer concrete constituent. There are two types of fly ash that are used generally, namely type C (high-calcium fly ash) and type F (low-calcium fly ash). Generally, researchers use low-calcium fly ash due to its good characteristics for geopolymer concrete, despite the fact that high-calcium fly ash is very abundant and turns to hazardous waste to the environment. High calcium fly ash is rarely used because of its poor characteristics when applied as the main material of geopolymer concrete. The high level of calcium in fly ash causes a quick hardening time of geopolymer concrete so it is very difficult to be implemented as a large-scale construction material.
This paper discusses G-Marine as an innovation in developing high-calcium fly ash-based geopolymer concrete products with an alternative mixing method to maximize the potential of this type of fly ash waste. This innovation aims to produce port construction materials. To overcome the disadvantages of high-calcium fly ash when used as geopolymers, this innovation developed a geopolymer concrete mixing method called the Separate Method. A separate method is the mixing method by means of primarily reacting the fly ash with a NaOH solution with the principle of solid-liquid extraction (leaching). This method can extend the hardening time and improve the quality of concrete so that it can be applied as a large-scale construction material. Several tests were conducted in this study, including Hardening Time Test, Compressive Strength Test, UPV Test, and Permeability Test.
Setting time test for G-Marine paste hardening were 15 minutes for normal mixing methods and 195 minutes for separate mixing methods. These results indicate that separate methods are easier to implement in large-scale construction. In terms of quality, the compressive strength of normal mixing methods of reached 33.93 MPa, while the compressive strength of separate mixing methods reached 40.34 MPa. Compressive strength test at 28 days with a separate method has fulfilled the requirements of SNI 2847-2013 for marine building construction material, which is above 35 MPa. The results of compressive strength indicate that exposure to seawater improves the quality of geopolymer concrete. Increasing the quality of concrete due to seawater exposure proves that G-Marine has the potential to be implemented as a port construction material. Further, the UPV test produced an average ultrasonic wave velocity of 2763.3 m/s for the normal mixing method and 4046.67 m/s for the separate mixing method at 28 days. Based on the IS 1331101-1992 standard, the quality of concrete with a separate method is classified as the “good” category, whereas the normal method is classified as the “doubtful category. Furthermore, permeability testing produces coefficients of 0,444x10-16m2 for the normal method and 0,167x10-16m2 for the separate method. The smaller the permeability coefficient, the harder it is for concrete to pass through water. This data supports the statement that geopolymer concrete made by a separate method has a better quality when applied as a port construction material.
Further review will be carried out to prove the durability of G Marine in long-term seawater environment. Further research efforts will be carried out so that this product can be implemented in the next two years as a port structural element. The application of G-Marine can support the nation’s economic growth. The cost analysis aspect showed that implementation of G-Marine is more economical up to 14,8% compared to conventional marine concrete. Lower implementation costs support this innovation to increase the procurement of marine infrastructure in order to realize Indonesia as the world's maritime axis.
Prioritas Pencapaian Prestasi Tahun Tingkat
1 Publikasi Jurnal Internasional Q3 Publikasi International Journal of GEOMATE 2019 Internasional Lihat
2 Publikasi Jurnal Internasional Q4 Publikasi Asian Journal of Applied Science 2017 Internasional Lihat
3 Juara 1 Kompetisi Jembatan Indonesia (KJI) XIV Jembatan Baja 2018 Nasional Lihat
4 Juara Kategori Jembatan dengan Kesesuaian Implementasi Terhadap Rancangan Terbaik KJI XIV Kompetisi Jembatan Indonesia (KJI) XIV Jembatan Baja 2018 Nasional Lihat
5 Juara Kategori Jembatan Terkokoh KJI XIV Kompetisi Jembatan Indonesia (KJI) XIV Jembatan Baja 2018 Nasional Lihat
6 Juara Kategori K3 Terlengkap KJI XIV Kompetisi Jembatan Indonesia (KJI) XIV Jembatan Baja 2018 Nasional Lihat
7 Juara Umum KJI XIV Kompetisi Jembatan Indonesia ke-14 (KJI XIV) 2018 Nasional Lihat
8 Proposal PKM 5 Bidang Terdanai Program Kreativitas Mahasiswa 2018 Nasional Lihat
9 Proposal PKM 5 Bidang Terdanai Program Kreativitas Mahasiswa 2016 Nasional Lihat
10 Kepala Divisi PKM (Program Kreativitas Mahasiswa) Himpunan Mahasiswa 2018 Propinsi Lihat

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