Analisis Efek Penambahan Nano-SiO₂ Berbasis Limbah Sandblasting Terhadap Perilaku Mekanik dan Termal Beton

Mubarak, Bahrul Ilmi (2025) Analisis Efek Penambahan Nano-SiO₂ Berbasis Limbah Sandblasting Terhadap Perilaku Mekanik dan Termal Beton. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam mendukung perkembangan infrastruktur berkelanjutan, material konstruksi ramah lingkungan dibutuhkan dalam meminimalisir emisi CO₂ yang dihasilkan oleh semen pada beton. Salah satunya dengan memanfaatkan limbah hasil sandblasting dari PT. Dok Pantai, Lamongan yang dapat digunakan sebagai bahan tambah pada semen. Bahan tambah tersebut dimodifikasi sebagai material nanoteknologi berupa nano-SiO₂. Penelitian ini bertujuan untuk mengetahui karateristik dari material nano-SiO₂, dan menginvestigasi pengaruh aditif nano-SiO₂ dari limbah sandblasting dengan kadar bervariasi terhadap karakteristik mekanik dan termal pada beton. Pada penelitian ini, nano-SiO₂ dari limbah sandblasting disintesis dengan menggunakan metode alkali fusi. Nano-SiO₂ hasil sintesis digunakan sebagai aditif dalam campuran mortar dengan variasi 0%, 1%, 2%, 3%, 4%, dan 5%. Setelah itu, nano-SiO₂ juga digunakan sebagai aditif pada campuran beton dengan variasi 0%, 1%, 2%, dan 3% yang mengacu pada tiga hasil terbaik dari benda uji mortar. Hasil penelitian menunjukkan produksi nano-SiO₂ dengan metode alkali fusi menghasilkan kemurnian silika (SiO₂) sebesar 95,9% dan distribusi ukuran sebesar 7,09 ± 1,89 nm. Variasi penambahan nano-SiO₂ dengan variasi optimum 2% pada campuran mortar menunjukkan adanya pengaruh peningkatan kuat tekan mortar hingga 27,31%. Pada campuran beton dengan nano-SiO₂ variasi optimum 1% memberikan pengaruh terhadap peningkatan kuat tekan hingga 40,81%. Semakin besar persentase penambahan nano-SiO₂, maka nilai konduktivitas termal menurun hingga 22,2%, panas spesifik yang meningkat hingga 8,3%, dan koefisien ekspansi termal yang menurun hingga 38,7%.
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In supporting sustainable infrastructure development, environmentally friendly construction materials are needed to minimize CO₂ emissions produced by cement in concrete. One way to do this is by utilizing sandblasting waste from PT. Dok Pantai, Lamongan, which can be used as an additive in cement. This additive is modified into a nanotechnology material in the form of nano-SiO₂. This study aims to determine the characteristics of nano-SiO₂ material and investigate the effect of nano-SiO₂ additives from sandblasting waste with varying concentrations on the mechanical and thermal characteristics of concrete. In this study, nano-SiO₂ from sandblasting waste was synthesized using the alkali fusion method. The synthesized nano-SiO₂ was used as an additive in mortar mixtures with variations of 0%, 1%, 2%, 3%, 4%, and 5%. Additionally, nano-SiO₂ was used as an additive in concrete mixtures with variations of 0%, 1%, 2%, and 3%, based on the three best results from the mortar test specimens. The results showed that the production of nano-SiO₂ using the alkali fusion method yielded a silica (SiO₂) purity of 95.9% and a size distribution of 7.09 ± 1.89 nm. The addition of nano-SiO₂ at an optimal concentration of 2% in the mortar mixture showed an increase in compressive strength of up to 27.31%. In the concrete mixture with nano-SiO₂ at an optimal concentration of 1%, there was an increase in compressive strength of up to 40.81%. As the percentage of nano-SiO₂ added, the thermal conductivity decreased by up to 22.2%, the specific heat increased by up to 8.3%, and the thermal expansion coefficient decreased by up to 38.7%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	beton, karakteristik mekanik, karakteristik termal, limbah sandblasting, metode alkali fusi, nano-SiO₂; concrete, nano-SiO2, sandblasting waste, alkali fusion method, thermal characteristics, mechanical characteristics
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Bahrul Ilmi Mubarak
Date Deposited:	28 Jul 2025 01:35
Last Modified:	28 Jul 2025 01:35
URI:	http://repository.its.ac.id/id/eprint/121854

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