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1. Introduction. Utilizing resources economically and effectively has become a priority nowadays. Cement, being the primary component of concrete, has been under criticism in recent decades for the amount of CO 2 emitted during its manufacture [1,2,3].While cement possesses superior mechanical characteristics, it has been unable …
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decrease the crystal size of the nanosilica particles. Keywords : boiler ash, nanosilica, ultrasonication, surfactant, degree of crystallinity ABSTRAK Abu ketel industri gula memiliki kandungan silika yang dapat disintesis menjadi nanosilika dengan metode ultrasonikasi. Penambahan surfaktan pada sintesis nanosilika dengan metode ulttrasonikasi ...
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Sargam Y and Wang K (2021) Influence of dispersants and dispersion on properties of nanosilica modified cement-based materials. 118 (September 2020) Jassam TM, Kien-woh K, Lau B, Yaseer MMM (2019) Novel cement curing technique by using controlled release of carbon dioxide coupled with nanosilica. Constr Build Mater …
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Nano-silica (nS) or silica nanoparticles, also known as silicon dioxide nanoparticles, can be used as additives for improving concrete's mechanical and durability properties [24], [25], [26].The effect of nS on nanostructure of cement paste also confirmed the improvement in concrete durability [27].The results revealed the nS as an excellent …
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4 Slump. Slump denotes the average diameter of the concrete after releasing the standard slump cone,and is one of the important indexes to measure the plasticizing performance of concrete [].Björnström and Quercia et al.[62, 63] found that the slump value of Nano-silica modified concrete is between 80mm-100mm, which is 40%–60% lower …
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Nanosilika Maksimalkan Produksi Pertanian. Prof Agus Subagio merupakan pemilik 22 hak paten. PENGGUNAAN nanosilika sebagai pupuk yang disemprotkan ke daun, terbukti mampu memaksimalkan produksi tanaman pertanian seperti padi, jagung, tebu dan sagu. Dalam uji yang dilakukan, penggunaan nanosilika secara …
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Nano-silika adalah bahan kimia anorganik, umumnya dikenal sebagai "karbon hitam putih ultra-halus". Ini adalah bahan non-logam anorganik yang tidak beracun, tidak berbau, dan bebas polusi dan bahan baru anorganik ultra-halus berteknologi tinggi. Ukurannya antara 1~100nm, dan memiliki struktur jaringan tiga dimensi, yang mudah …
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KATA PENGANTAR Assalamualaikum Warahmatullahi Wabarakatuh. Segala puji bagi Allah SWT yang telah melimpahkan rahmat serta karunia-Nya sehingga penelitian tugas akhir yang berjudul "Pembuatan Nano Serbuk Silika dari Limbah Sekam Padi Menggunakan HEM dengan Optimasi Waktu Milling" dapat diselesaikan di Laboratorium Fisika Sains …
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2.1. Materials. The raw material used to produce silica nanoparticles was supplied from silica sand on Belitung Island, Indonesia. According to X-ray fluorescence (XRF) analysis, the SiO 2 concentration of silica sand is about 99.42%. All the chemicals used were nitric acid, hydrochloric acid, sodium hydroxide, methanol, ethanol, and 2-propanol, purchased from …
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Sintesis dan Karakterisasi Nanosilika sebagai Upaya Pemanfaatan Potensi Sumberdaya Banjarbaru Totok Wianto, Nurma Sari, Darminto, dan Suminar Pratapa Abstrak: Penelitian untuk mendapatkan bahan baru dengan kinerja tinggi telah banyak dilakukan, khususnya di negara-negara industri.
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For this purpose, shear strength tests are performed, as well as unconfined compressive tests and static and cyclic triaxial tests. In static and cyclic triaxial tests, the cement content used is 5% and 14% (dry weight) of the sand. The nano silica contents were 0%, 5%, 10%, and 20% (dry weight) of the cement.
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Colloidal nano-silica (CNS) was used to improve the mechanical and impermeability characteristics of mortar in this study. The samples were prepared with 0%, 1%, 2% and 3% (solid content) CNS addition. The mechanical strength and permeability of each mixture was studied, and the mechanism behind was revealed by hydration heat …
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Nano-silica modified phenolic resin film is prepared using different mass fractions of nano-silica by liquid composites molding (LCM). The effects of nano-silica on the rheology and curing of phenolic resin are studied by rheometer and differential scanning calorimeter (DSC). The results show that the viscosity of nano-silica modified phenolic resin …
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Adak et al. [13] investigated the performance of nanosilica in fly ash-based geopolymer concrete and observed that in the presence of nanosilica, the dissolution rate of Si and Si-Al increases and accelerates the rate of geopolymerization. This is related to the amorphous nature of nanosilica and its high surface area.
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Section snippets Effect of nano-silica on properties of fresh concrete. The interaction of nS particles in fresh concrete shows their influence on different properties of fresh concrete, such as workability, setting time, consistency, etc. Zhang et al. [34], [41] reported that the use of 2% nS particles in high-volume fly ash (HVFA) and slag concrete …
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Utilization of nano-silica is an effective method to improve the early properties of blended cement containing high-volume slag. In current work, the hydration of blended cement with high-volume slag (40 wt%, 60 wt% and 80 wt%) and nano-silica has been investigated by testing setting time, heat of hydration, compressive strength, hydration …
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silika sintetis yang berstruktur amorph. Silika gel merupakan salah satu bahan kimia berbentuk. padatan yang banyak dimanfaatkan sebagai adsorben. Hal ini disebabkan oleh mudahnya produksi. dan juga beberapa kelebihan yang lain, yaitu : sangat inert, hidrofilik, mempunyai kestabilan termal.
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