Studi Parametrik Kuat Tekan Mortar Geopolimer Abu Terbang
DOI:
https://doi.org/10.22219/jmts.v18i2.12921Keywords:
curing, fly ash, geopolymer, parametric studyAbstract
Abu terbang adalah limbah berbentuk butiran halus atau bubuk berasal dari aktivitas pembakaran batu bara. Abu terbang biasanya digunakan sebagai material timbunan dan pupuk tanaman, namun dalam penelitian lebih lanjut abu terbang dapat dimanfaatkan sebagai pengganti sebagian maupun semen pada mortar. Material abu terbang diaktifkan dengan kombinasi natrium hidroksida dan natrium silikat yang dikenal sebagai geopolimer. Penelitian ini bertujuan untuk mendapatkan komposisi optimum kuat tekan mortar geopolimer abu terbang dari parameter konsentrasi natrium hidroksida, modulus silikat, dan tamabahan OPC. Abu terbang yang digunakan adalah kelas F, dan dimanfaatkan sebagai bahan dasar mortar untuk plester. Mortar dibuat dengan mencampurkan abu terbang, pasir, natrium hidroksida dan natrium silikat serta superplasticizer, lalu mortar dicetak dan didiamkan selama tiga hari (rest period). Sampel dirawat pada suhu ruang dan dilakukan uji kuat tekan mortar umur 7, 14, dan 28 hari. Hasil pengujian studi parametrik menunjukkan komposisi optimum mortar geopolimer abu terbang dapat dibuat dengan kombinasi variabel natrium hidroksida 12M, modulus silikat 2 dan tambahan OPC sebesar 30% pada suhu ruang.
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Copyright (c) 2020 Niko Rizaldi, Ali Imron Rusadi, Gunawan Wibisono, Edy Saputra, Monita Olivia
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