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All Journal JURNAL SIPIL STATIK JURNAL ILMIAH MEDIA ENGINEERING TEKNO Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa Civil Engineering Dimension
Steenie E. Wallah
Universitas Sam Ratulangi
Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Languange, Linguistic, Communication & Media

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Journal : Civil Engineering Dimension

 1 
FACTORS INFLUENCING THE COMPRESSIVE STRENGTH OF FLY ASH-BASED GEOPOLYMER CONCRETE Djwantoro Hardjito; Steenie E Wallah; Dody M.J. Sumajouw; B.V Rangan
Civil Engineering Dimension Vol. 6 No. 2 (2004): SEPTEMBER 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (118.836 KB) | DOI: 10.9744/ced.6.2.pp. 88-93

Abstract

This paper describes the effects of several factors on the properties of fly ash based geopolymer concrete, especially the compressive strength. The test variables included were the age of concrete, curing time, curing temperature, quantity of superplasticizer, the rest period prior to curing, and the water content of the mix. The test results show that the compressive strength of geopolymer concrete does not vary with age, and curing the concrete specimens at higher temperature and longer curing period will result in higher compressive strength. Furthermore, the commercially available Naphthalene-based superplasticizer improves the workability of fresh geopolymer concrete. The start of curing of geopolymer concrete at elevated temperatures can be delayed at least up to 60 minutes without significant effect on the compressive strength. The test data also show that the water content in the concrete mix plays an important role.
Creep Behaviour of Fly Ash-Based Geopolymer Concrete Wallah S.E.
Civil Engineering Dimension Vol. 12 No. 2 (2010): SEPTEMBER 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (165.575 KB) | DOI: 10.9744/ced.12.2.73-78

Abstract

Fly ash-based geopolymer concrete is manufactured using fly ash as its source material and does not use Portland cement at all. Beside fly ash, alkaline solution is also utilized to make geopolymer paste which binds the aggregates to form geopolymer concrete. This paper presents the study of creep behaviour of fly ash-based geopolymer concrete. Four series of specimens with various compressive strengths were prepared to study its creep behaviour for the duration of test up to one year. The test method followed the procedures applied for Ordinary Portland Cement (OPC) concrete. Test results show that fly ash-based geopolymer concrete undergoes low creep which is generally less than that of OPC concrete. After one year of loading, the results for specific creep of fly ash-based geopolymer concrete in this study ranges from 15 to 29 microstrain for concrete compressive strength 67–40 MPa respectively. From the test results, it is also found out that the creep coefficient of fly ash-based geopolymer concrete is about half of that predicted using Gilbert’s Method for OPC concrete.
Co-Authors Abdul Ahad Ghifar Ente Adrian David Tumelap, Adrian David ADRIANA KARUNDENG Alow, Grace Ruth Andre Kusuma Putra B.V Rangan Banu Dwi Handono, Banu Dwi Berly A. Kalembiro Berny Andreas Engelbert Rumimper Bonny M. M. Ointu Braien Octavianus Majore, Braien Octavianus Chandra Hansun Tanudjaja Christian Eko Wior, Christian Eko Christoffel Tanauma Christy Nathalie Brenda Turambi, Christy Nathalie Brenda Dalo, Yohanes Debrito Diane Sumendap Djwantoro Hardjito Dody M.J. Sumajouw Ellen J. Kumaat Febrianti Kumaseh, Febrianti Femmy Nurul Akbar Feraldy F. X. Wongkar Filia Eunike Sofia Paat Fillino Erwinsyah Franky G. T. Mamuaja Freddy Jansen Gabriel Bridges Rerungan Grevardo Febrigiano Laheba Griebel H. Rompas Gumalang, Stevanny H. Manalip Handy Yohanes Karwur Hanock Tanudjaja Harahap, John. Th. Hendrico J. Waraba Herawaty Riogilang Hieryco Manalip Hizkia Yehezkiel Mamesah Janre Henry Mentang Jorry D. Pangouw Kaat, Brandon Christofer Kembuan, Patricia Khonado, Monica Fransisca Kojongian, Alexandro Mark Kosakoy, Merry N. M. Laily, Rivaldo Lelyani Kin Khosama Lerry M. N. Gerung Liando, Frinsilia Jaglien Lucia Lefrandt Lukar, Stevania Elisabeth Claudia M. J. Paransa Malino, Leonardus Mamesah, Yoshua Immanuel Manalip, H Manossoh, Gevin Brave Marthin D. J. Sumajouw Marthin D. J. Sumajouw Marthin Dody Josias Sumajouw Merry N. M. Kosakoy Mielke R. I. A. J. Mondoringin, Mielke R. I. A. J. Mikael Lumban Batu, Mikael Miza, Sisilia Dwi Sartika Mondoringin, Mielke R. I. A. Muhammad Q. Minabari Nelwan, Intan Tiara Ni Ketut Suputri Novi Angjaya Ondang, Celien Quinli Pandegiroth, Yonathan Papulele, Fernando Willem Gamaliel Pati, Maria Sari Pesik, Estty Rodianti Potalangi, Jessen G. Prijantoro, Johanes P. E. Prins, Muhammad Immalombassi Putra, Riski Yendrawan Reky S. Windah Reky S. Windah Rico Daniel Sumendap, Rico Daniel Ronny E. Pandaleke Ronny E. Pandaleke Ronny Pandaleke Rosie Arizki Intan Sari Ruddy Tenda Rudolvo Wenno Sandea Rerung Sandri Linna Sengkey Sembiring, Andrew Yeheskiel Servie O. Dapas Servie O. Dapas Sesty E. J. Imbar Sharon Ruth Toreh, Sharon Ruth Slat, Ventje Berty Soentpiet, Bill Johan Sondakh, Chichilya S.P. Steven Limbongan, Steven Sumajouw, Angga Josua Sumajouw, M. D.J Sumampouw, Franco Michael Takapente, Giano N. O. Tambingon, Fiki Riki Tampi, Jeanicha Christiani Tandiono, Million Tenda, Rudy Theyni J. Korompis Tjoanto, Roynaldo Vanessa Irena Kullit Vilty Stilvan Karundeng, Vilty Stilvan Wakkary, Satya Eliazer Donatus Winny J. Tamboto Yacob Yonadab Manuhua, Yacob Yonadab Yustina Yuliana Ria Salonde, Yustina Yuliana Ria