Investigation and Analysis of CO2 Uptake in Pre Carbonation Ground Granulated Blast Furnace Slag (GGBFS)

Pratiwi, Awanda Nur (2025) Investigation and Analysis of CO2 Uptake in Pre Carbonation Ground Granulated Blast Furnace Slag (GGBFS). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini menyelidiki potensi GroundGranulated Blast Furnace Slag (GGBFS) dalam menyerap karbon dioksida (CO₂) melaluiproses pra-karbonasi yang bertujuan untuk mengembangkan bahan semen berkarbon rendah.Spesimen pasta GGBFS disiapkan dengan perbandingan air-ke-padatan yang bervariasi danpenguat kimia spesifik untuk meningkatkan reaktivitas karbonasi. Spesimenkemudian diekspos pada kondisi CO₂ bertekanan tinggi untuk mensimulasikan karbonasiyang dipercepat.Jumlah penyerapan CO₂ diukur melalui penambahan massa dan dikonfirmasi melalui analisis termogravimetri (TGA), dengan fokus pada rentang dekomposisi senyawa karbonat. Hasil menunjukkan bahwa baik kandungan air maupun jenis penguat secara signifikan mempengaruhi kapasitas pengikatan CO₂. Efisiensi karbonasi yang lebih tinggi dicapai pada kondisi campuran yang dioptimalkan. Penelitian ini menunjukkan bahwa GGBFS yang telah dikarbonasi sebelumnya dapat berfungsi sebagai bahan konstruksi berkelanjutan yang mampu menangkap emisi CO₂ industri. Hal ini memberikan pendekatan yang menjanjikan untuk mengurangi dampak lingkungan produksi semen dan mendukung penggunaan sirkular produk sampingan industri.
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This study investigates the potential of Ground Granulated Blast Furnace Slag (GGBFS) to absorb carbon dioxide (CO₂) through a pre-carbonation process aimed at developing low-carbon cementitious materials. GGBFS paste specimens were prepared with varying water-to-solid ratios and specific chemical accelerators to enhance carbonation reactivity. The specimens were then exposed to high-pressure CO₂ conditions to simulate accelerated carbonation. The amount of CO₂ uptake was measured through mass gain and confirmed by thermogravimetric analysis (TGA), focusing on the decomposition range of carbonate compounds. Results showed that both water content and accelerator type significantly influenced the CO₂ binding capacity. Higher carbonation efficiency was achieved under optimized mixture conditions. This research demonstrates that pre-carbonated GGBFS can serve as a sustainable construction material capable of capturing industrial CO₂ emissions. It provides a promising approach for reducing the environmental impact of cement production and supports the circular use of industrial by-products.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	GGBFS, CO₂ uptake, Pre-carbonation, TGA, Sustainable binder, High-pressure carbonation.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials.
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Awanda Nur Pratiwi
Date Deposited:	01 Aug 2025 07:19
Last Modified:	01 Aug 2025 07:19
URI:	http://repository.its.ac.id/id/eprint/124342

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