Synthesis of Sodium Silicate from Rice Husk Ash as an Activator to Produce Epoxy-Geopolymer Cement

Handayani, Lia; Aprilia, Sri; Abdullah, Abdullah; Rahmawati, Cut; Bakri, A.M. Mustafa Al; Aziz, Ikmal Hakem; Azimi, Emy Aizat

doi:10.1088/1742-6596/1845/1/012072

Cited by 22 publications

(10 citation statements)

References 16 publications

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“…The composition of the geopolymer paste mixture was made proportionally based on previous work carried out by lab workers at room temperature [ 15 , 16 ]. The ratio for the mixed formula is based on the ratio Na 2 SiO 3 /NaOH = 1.…”

Section: Methodsmentioning

confidence: 99%

The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement

et al. 2021

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Nanosilica produced from physically-processed white rice husk ash agricultural waste can be incorporated into geopolymer cement-based materials to improve the mechanical and micro performance. This study aimed to investigate the effect of natural nanosilica on the mechanical properties and microstructure of geopolymer cement. It examined the mechanical behavior of geopolymer paste reinforced with 2, 3, and 4 wt% nanosilica. The tests of compressive strength, direct tensile strength, three bending tests, Scanning Electron Microscope-Energy Dispersive X-ray (SEM/EDX), X-ray Diffraction (XRD), and Fourier-transform Infrared Spectroscopy (FTIR) were undertaken to evaluate the effect of nanosilica addition to the geopolymer paste. The addition of 2 wt% nanosilica in the geopolymer paste increased the compressive strength by 22%, flexural strength by 82%, and fracture toughness by 82% but decreased the direct tensile strength by 31%. The microstructure analysis using SEM, XRD, and FTIR showed the formation of calcium alumina-silicate hydrate (C–A–S–H) gel. The SEM images also revealed a compact and cohesive geopolymer matrix, indicating that the mechanical properties of geopolymers with 2 wt% nanosilica were improved. Thus, it is feasible for nanosilica to be used as a binder.

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Section: Methodsmentioning

confidence: 99%

The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement

et al. 2021

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“…Bahan utama semen portland adalah silika, kalsium dan alumina. Oleh karena itu sebagian semen dapat diganti dengan bahan lain yang juga kaya akan silika [1]. Beberapa penelitian sebelumnya menunjukkan bahwa bahan yang kaya akan silika adalah fly ash [2], abu sekam padi [3], [4], serbuk kaca [5], [6], limbah karbit [7] dan lainnya.…”

Section: Pendahuluanunclassified

Teaching Industry : Pengolahan Limbah Kaca Menjadi Produk Konstruksi

et al. 2022

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Konsep teaching industry dalam era merdeka belajar yang digagas Kementerian Pendidikan, Kebudayaan Riset dan Teknologi telah mendorong kolaborasi antara dosen dengan mitra industri dalam mengembangkankan ilmu pengetahuan dan teknologi. Kegiatan pengabdian ini mengusung tema pemanfaatan limbah kaca pada produk konstruksi non-struktural. Limbah kaca merupakan material yang terbuang dan belum dimanfaatkan secara baik. Limbah kaca kaya akan silika, oleh karena itu sangat baik dijadikan pengganti sebagian semen karena kandungan tertinggi semen adalah silika. Metode yang dilakukan adalah dengan terlebih dahulu mencari informasi permasalahan mitra dalam melaksanakan produksi dan dilanjutkan dengan pelatihan. Modifikasi ukuran partikel dilakukan dengan alat penghancur kaca hingga didapat ukuran rata-rata 50 µm. Serbuk kaca ini digunakan untuk menggantikan sebagian semen dalam pembuatan lubang angin. Produk yang dihasilkan menunjukkan kuat tekan dan daya serap air sebesar masing-masing 9,23 MPa dan 8,76% dan dinyatakan layak untuk digunakan pada bangunan. Kegiatan pengabdian ini memberikan dampak positif pada mitra yaitu mitra sudah dapat mengaplikasikan limbah kaca menjadi produk berguna dan benilai ekonomis. Kolaborasi ini telah menjadikan Universitas Abulyatama sebagai motor inovasi reka cipta untuk mendorong akselerasi hilirisasi riset dosen.

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“…This material is a reasonably available agricultural waste containing up to 90% SiO 2 , and its application to geopolymers has been reported [ 10 , 11 ]. RHA has been widely examined recently as a promising additive to cement and geopolymer and is also used to produce sodium silicate [ 12 ]. However, the mechanical testing of geopolymers on flexural strength and fracture toughness using sodium silicate from RHA has never been carried out.…”

Section: Introductionmentioning

confidence: 99%

Sodium Silicate from Rice Husk Ash and Their Effects as Geopolymer Cement

et al. 2022

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Sodium silicate is a commonly used activator in geopolymer that is produced commercially. In this study, rice husk ash (RHA) from agricultural waste was used to synthesize sodium silicate as an activator for geopolymer cement. This white ash was applied for producing sodium silicate with different molarities (8, 10, and 12) and then used to synthesize fly ash-based geopolymer cement. Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR) were applied to investigate the micro-characteristics of the geopolymerization products. Bulk density, water absorption, compressive strength, flexural strength, and fracture toughness were carried out to measure and evaluate the geopolymers with sodium silicate. The combination of 10 M NaOH with sodium silicate increased the compressive strength by 16.21% and the flexural strength and fracture toughness by 81.6%. However, sodium silicate combined with 12 M NaOH decreased compressive strengths by 13.23% and flexural strength and fracture toughness by 61.94%. The lowest water absorption value of 12.3% was obtained in a geopolymer paste using sodium silicate combined with 10 M NaOH, and the largest was 13.3% for sodium silicate combined with 8 M NaOH. The microstructure analysis showed the hydrated calcium alumina silicate gel (C–A–S–H) and the SEM image also revealed a compact geopolymer matrix. Thus, it can be concluded that sodium silicate from rice husk ash can be utilized as an activator or reactive material to produce geopolymer cement with a good geopolymer network.

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Synthesis of Sodium Silicate from Rice Husk Ash as an Activator to Produce Epoxy-Geopolymer Cement

Cited by 22 publications

References 16 publications

The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement

The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement

Teaching Industry : Pengolahan Limbah Kaca Menjadi Produk Konstruksi

Sodium Silicate from Rice Husk Ash and Their Effects as Geopolymer Cement

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