Studi Perilaku Pasta Geopolymer Ordinary Portland Cement Hybrid

Remigildus Cornelis; Iwan Rustendi

doi:10.29103/tj.v12i2.764

Studi Perilaku Pasta Geopolymer Ordinary Portland Cement Hybrid

Remigildus Cornelis, Iwan Rustendi

Abstract

Abstrak

Kuat tekan awal pada pasta geopolymer akan tinggi jika menggunakan bantuan perawatan panas. Hal ini karena reaksi geopolimer bersifat endotermik. Ini adalah salah satu hambatan aplikasinya. Paper ini bertujuan memaparkan karakteristik pasta geopolimer-OPC hybrid tanpa perawatan panas. Pasta geopolimer-Portland semen hybrid diperoleh dengan memvariasi prosentase subtitusi OPC terhadap fly ash yaitu 0%, 5%. 10% dan 15%. Parameter yang ditinjau adalah konsistensi, Setting time dan kuat tekan. Hasil pengujian menunjukan karakteristik pasta geopolimer-OPC hybrid bahwa Nilai konsistensi lebih kecil dari konsistensi normal OPC, Semakin tinggi prosentase subtitusi fly ash setting time awal dan akhir semakin singkat kurang dari 1 jam, namun kuat tekan semakin meningkat. Hal menunjukkan bahwa geopolimer-OPC hybrid dapat digunakan untuk pekerjaan pengecoran yang membutuhkan waktu pengikatan awal yang singkat misalnya paving blok atau lapisan perkerasan jalan.

Kata kunci: Karakteristik, Pasta, Geopolimer, Ordinary Portland Cement, Hybrid

Abstract

Heat treatment on the geopolymer paste can result in high early compressive strength because the geopolymer reaction is endothermic. This condition is one of the obstacles to its application. This article describes the characteristics of geopolymer-Portland cement hybrid pastes without heat treatment. The hybrid geopolymer-Portland cement paste was obtained by varying the percentage substitution of Portland cement to fly ash, namely 0%, 5%, 10%, and 15%. Parameters observed are consistency, setting time, and compressive strength. The results show the characteristics of the hybrid geopolymer-Portland cement paste Its consistency is smaller than standard Portland cement. The higher the percentage of substitution, the initial and the final setting time are shorter, less than one hour, but the compressive strength increases. This shows that hybrid geopolymer-Portland cement can be used for the works that require a short initial setting time, such as paving blocks or road pavement layers.

Keywords: Characteristic, Paste, Geopolymer, Ordinary Portland Cement, Hybrid

Keywords

Characteristic, Paste, Geopolymer, Ordinary Portland Cement, Hybrid

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References

ntoni, A. et al, 2020. Fresh and Hardened Properties of High Calcium Fly Ash-Based Geopolymer Matrix with High Dosage of Borax, Iranian Journal of Science and Technology - Transactions of Civil Engineering, 44(0123456789), hal. 535–543. doi: 10.1007/s40996-019-00330-7.

ASTM 109-99, 1999. Standard Test Method for Compressive Strength of Hydraulic Cement Mortars, ASTM 109, hal. 1–6.

ASTM C 191 – 04, 2004. Time of Setting of Hydraulic Cement by Vicat Needle 1.

ASTM C187 − 16, 2016. Standard Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement Paste, ASTM International, hal. 1–3. doi: 10.1520/C0187-16.2.

ASTM C618-12a, 2014. Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete, ASTM International, hal. 1–5. doi: 10.1520/C0618.

Damtoft, J. S. et al, 2008. Sustainable development and climate change initiatives, Cement and Concrete Research, 38(2), hal. 115–127. doi: 10.1016/j.cemconres.2007.09.008.

Davidovits, J, 1994. Global Warming Impact on the Cement and Aggregates Industries, World Resource Review, 6(2), hal. 263–278.

Duxson, P. et al, 2007. Geopolymer technology: The current state of the art, Journal of Materials Science, 42(9), hal. 2917–2933. doi: 10.1007/s10853-006-0637-z.

Fernández-Jiménez, A. et al, 2014. Specific examples of hybrid alkaline cement, MATEC Web of Conferences, 11, hal. 2–4. doi: 10.1051/matecconf/20141101001.

Garcia-Lodeiro, I. et al, 2011. Compatibility studies between N-A-S-H and C-A-S-H gels. Study in the ternary diagram Na2O-CaO-Al2O3-SiO 2-H2O, Cement and Concrete Research, 41(9), hal. 923–931. doi: 10.1016/j.cemconres.2011.05.006.

García-Lodeiro, I. et al, 2012. Hybrid alkaline cements. Part I: Fundamentals, Revista Romana de Materiale/ Romanian Journal of Materials, 42(4), hal. 330–335.

Hadi, M. N. S., Zhang, H. dan Parkinson, S, 2019. Optimum mix design of geopolymer pastes and concretes cured in ambient condition based on compressive strength, setting time and workability, Journal of Building Engineering, 23(November 2018), hal. 301–313. doi: 10.1016/j.jobe.2019.02.006.

Palomo, Á. et al, 2013. Cimenturi Hibride Alcaline . Partea a II-a : Factorul Clincher Hybrid Alkaline Cements . Part I: Fundamentals, Romanian Journal of materials, 43(1), hal. 74–80.

Topark-Ngarm, P., Chindaprasirt, P. dan Sata, V, 2015. Setting Time, Strength, and Bond of High-Calcium Fly Ash Geopolymer Concrete,” Journal of Materials in Civil Engineering, 27(7), hal. 1–7. doi: 10.1061/(asce)mt.1943-5533.0001157.

Yang, K. H., Cho, A. R. dan Song, J. K, 2012. Effect of water-binder ratio on the mechanical properties of calcium hydroxide-based alkali-activated slag concrete, Construction and Building Materials, 29, hal. 504–511. doi: 10.1016/j.conbuildmat.2011.10.062.

DOI: https://doi.org/10.29103/tj.v12i2.764