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I Made Alit Karyawan Salain
Program Studi Magister Teknik Sipil Universitas Udayana
Civil Engineering, Building, Construction & Architecture Environmental Science

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Kekuatan dan Permeabilitas Beton Abu Terbang Volume Tinggi I Made Alit Karyawan Salain
Jurnal Teknik Sipil Vol 28 No 2 (2021): Jurnal Teknik Sipil
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2021.28.2.2

Abstract

Abstrak Tulisan ini menyajikan hasil penelitian tentang properti dari beton abu terbang volume tinggi (ATVT) yang telah mengeras yang dibuat dengan mengganti sebagian semen Portland biasa (SPI) dengan abu terbang kelas C (ATC). Tujuan dari penelitian adalah untuk memeriksa perkembangan kekuatan dan permeabilitas beton ATVT terhadap waktu hidrasi. Tiga campuran beton ATVT, M1, M2, dan M3, dibuat dengan mengganti berturut-turut 40%, 50% dan 60% SPI dengan ATC, dalam perbandingan berat. Satu campuran kontrol, M0, dibuat dengan menggunakan 100% SPI. Proporsi campuran beton yaitu 1,0 perekat : 2,0 agregat halus : 3,0 agregat kasar dengan faktor air perekat sebesar 0,3. Pada setiap campuran ditambahkan 1,5% superplastisiser dari berat perekat. Uji yang dilaksanakan menyangkut kuat tekan, kuat tarik belah, dan permeabilitas pada umur 28, 56, dan 90 hari. Hasil uji menunjukkan bahwa kuat tekan, kuat tarik belah, dan impermeabilitas meningkat secara gradual dengan waktu hidrasi dan mampu mencapai yang dihasilkan oleh M0, terutama untuk campuran M1, setelah umur 90 hari. Mengacu pada hasil uji kuat tekan pada umur 28 hari, campuran beton ATVT tersebut dapat dipergunakan sebagai beton struktural. Kata-kata Kunci: Abu terbang kelas C, kuat tekan, kuat tarik belah, permeabilitas. Abstract This paper presents the result of research concerning the harden properties of high volume abu terbang (HVFA) concrete created by substituting ordinary Portland cement (OPC) with Class C fly ash (CFA). The goals of the research is to verify the strength and permeability evolution of the HVFA concrete with hydration time. Three HVFA concrete mixtures, M1, M2, and M3, were created by substituting OPC, by weight, with 40%, 50%, and 60% of CFA, successively. One control mixture, M0, was created by utilizing 100% OPC. The mix proportion of concrete was 1.0 binder : 2.0 fine aggregate : 3.0 coarse aggregate, and the water-binder ratio was 0.3. In each mixture, it was added 1.5% superplasticizer by binder weight. Tests conducted regarding compressive strength, splitting tensile strength and permeability at the age of 28, 56, and 90 days. The results show that the compressive strength, the splitting tensile strength and the impermeability of HVFA concrete improve gradually with hydration time and could reach those of M0, especially for M1 mixture, after 90 days of hydration. Based on the compressive strength test results at 28 days, the HVFA concrete mixtures could be used for structural concrete. Keywords: Class C fly ash, compressive strength, permeability, splitting tensile strength.
Study on Reactivity of Circulating Fluidized Bed Combustion Fly Ashes in the Presence of Water Salain I.M.A.K.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (187.551 KB) | DOI: 10.9744/ced.12.1.29-35

Abstract

A study on reactivity of four different Circulating Fluidized Bed Combustion (CFBC) fly ashes has been realized in the presence of water. Paste of each ash was prepared and analyzed for its setting time, expansion and strength. The products of hydration, and their evolutions over a period of time were identified by X-ray diffraction and differential thermal analysis. The results of this study show that the reactivity of the CFBC fly ashes is strongly related to their chemical composition, essentially to their quantity of silica, alumina, lime and sulfate, which promote principally the formation of ettringite, gypsum and C-S-H. It is further noted that the intensity and the proportion of these phases determine the hydration behavior of the CFBC fly ashes.
BERAT VOLUME PEREKAT GEOPOLIMER BERBAHAN DASAR ABU SABUT KELAPA I Nyoman Suta Widnyana; I Made Alit Karyawan Salain; I Nyoman Sutarja; Ida Bagus Rai Widiarsa
Jurnal Ilmiah Teknik Sipil Vol 26 No 2 (2022): Jurnal Ilmiah Teknik Sipil, Vol. 26 No. 2, Juli 2022
Publisher : Department of Civil Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2022.v26.i02.p04

Abstract

This study presents the effect of the comparison between precursors and alkaline activators on the volume weight of geopolymer binder. Geopolymer binder uses coconut fiber ash (CFA) as a precursor which contains: SiO2 (8,24%), K2O (70,6%), Cl (14,1%), P2O5 (2,3%) and Fe2O3 (2,25%). Use an alkaline activator: a solution of sodium silicate (SS) and sodium hydroxide (SH) with a molar concentration of 14M. The purpose of volume weight testing is to determine the density level of materials incorporating geopolymer binders. Variation in the proportion of the mixture of precursors (P) and alkaline activator (A) used the ratio: 70%:30%; 75%:25%; 80%:20% and the ratio between alkaline activator Na2SiO3 (SS) and NaOH solution (SH) is: 1:1; 1,5:1; 2:1 to the weight of the precursor. Specimens were printed as cubes with dimensions (50x50x50)mm and tested at specimen 7 and 28 days, respectively. The volume weight test standard refers to SNI 1973:2008. Test results show get a raise ratio of P/A and SS/SH will result in an increasing volume weight value while the volume weight value decreases by 1,3% - 1,4% along with the increase in specimen age.
KAJIAN AWAL PEMBUATAN BETON POROUS UNTUK PAVING BLOCK RAMAH LINGKUNGAN Yenni Ciawi; Made Alit Karyawan Salain; I Putu Adi Yana
EnviroScienteae Vol 18, No 3 (2022): ENVIROSCIENTEAE VOLUME 18 NOMOR 3, NOVEMBER 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/es.v18i3.14789

Abstract

In heavily populated urban areas, high rainfall can cause inundation and even flooding because the catchment area is decreasing. To reduce rainwater runoff and increase groundwater recharge, porous concrete can be used in housing area, in parking lots and roads with low traffic loads. Porous concrete is an environmentally friendly and sustainable building material. This study aims to examine the effect of aggregate composition on the porosity and tensile strength of porous concrete. The composition of the concrete mixture is determined based on the weight ratio between portland cement type I (PC) and coarse aggregate (AK), i.e. 1 PC : 3 AK, 1 PC : 4 AK, and 1 PC : 5 AK and the ratio of fine aggregate weight (AH) of 0 ; 0.5 ; 1, and the w/c is 0.5. For each variation, six 150 mm cubes were made. The parameters tested were slump, volume weight, porosity and compressive strength at day 28. The results show that the more coarse aggregate, the lower the volume weight and its compressive strength, and the higher the porosity and slump. Fine aggregate addition increases the compressive strength and volume weight and decrease slump value and porosity. The highest slump value (205 mm) and the smallest volume weight and compressive strength were obtained from concrete mixture with PC/AK=1/5 without AH content. The smallest slump (170 mm) and porosity values were obtained from concrete mixture with PC/AK=1:3 and AH/AK=1 and the largest volume weight and compressive strength. In this study, the slump value tends to be directly proportional to porosity and inversely proportional to volume weight and compressive strength. For further research, it is recommended that the w/c value be reduced to get a larger porosity value but without a significant decrease in compressive strength.
KUAT TEKAN BETON GEOPOLIMER MENGGUNAKAN ABU SEKAM PADI Lestari, Ni Made Dewi; Salain, I Made Alit Karyawan; Widiarsa, Ida Bagus Rai
JURNAL SPEKTRAN Vol 12 No 1 (2024)
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRAN.2024.v12.i01.p05

Abstract

Perkembangan pembangunan infrastruktur guna meningkatkan daya saing nasional terus mengalami peningkatan. Beton umumnya digunakan sebagai material utama dalam pembangunan infrastruktur. Semen merupakan material utama dalam proses produksi beton. Di mana produksi semen ini memiliki dampak seperti menghasilkan gas karbondioksida. Beton Geopolimer adalah jenis beton alternatif baru yang tidak menggunakan bahan semen sebagai bahan dasar dalam pembuatannya. Abu Sekam Padi (ASP) akan digunakan sebagai prekursor dan NaOH : Na2SiO3 akan digunakan sebagai aktivator. Dalam penelitian ini dibuat 3 campuran dengan memvariasikan persentase ASP dan aktivator yang digunakan. Variasi yang dibuat yaitu B1 (80%:20%) , B2 (70%:30%) , dan B3 (60%:40%). Larutan NaOH digunakan 14 M dengan perbandingan NaOH dan Na2SiO3 adalah 1:1,5. Kubus digunakan sebagai cetakan benda uji dalam penelitian ini dengan ukuran cetakan 15cm x 15cm x 15cm. Berdasarkan hasil yang diperoleh pada pengujian kuat tekan, kuat tekan tertinggi diperoleh pada variasi B2 dengan hasil sebesar 24,81 MPa pada umur benda uji 28 hari. Hal ini menunjukkan bahwa pengurangan jumlah prekursor dan penambahan aktivator sangat mempengaruhi workabilitas pada beton geopolimer.
Co-Authors Dharma Putra Dharmayanti, Gusti Ayu Putu Candra Gde Ngurah Anindita I Gde Uma Darmapramita I Gusti Agung Neny Purnawirati I Ketut Sudarsana I M. Jelantik I Made Aryana I Made Suparta I N. R. Karyasa I Nym Mahendra Martha Adi Pamungkas I Nyoman Ardika I Nyoman Mahendra Martha Adi Pamungkas I Nyoman Suta Widnyana I Nyoman Sutarja I Putu Adi Yana I W Yansen I W. Intara I W. Yansen Ida Bagus Rai Widiarsa K Antriksa Lestari, Ni Made Dewi M. Dodiek W. Ardana Made Sukrawa Mayun Nadiasa Ngakan Made Anom Wiryasa Ni Ketut Sudiani Octavio P.M Marques Putu Budayasa Teguh Arifmawan Sudhiarta W. Tahriri Wayan Mustika Widiarsa, Ida Bagus Rai Yenni Ciawi