Collection of scientific works Nanosystems, nanomaterials, nanotechnologies
Year 2025 Volume 23, Issue 3
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Andrie HARMAJI1, Soleh WAHYUDI2, and Rizky Febrian SUTRISNO2

1Advanced Materials Processing Laboratory, Institut Teknologi Bandung, Bandung, Indonesia
2Department of Metallurgical Engineering, Institut Teknologi Sains Bandung, Cikarang, Indonesia

Effect of Copper-Oxide-Nanoparticles'-Modified Paints to Properties of Cement-Based Mortar Exposed to Seawaters

895–903 (2025)

PACS numbers: 61.43.Gt, 62.23.St, 68.37.Hk, 77.84.Bw, 77.84.Lf, 81.05.Rm, 83.80.Fg

Received 16 May, 2024

Concrete fouling is the accumulation of unwanted material on solid surfaces caused by seawater exposure. Copper oxide (CuO) nanoparticles can be added to protect concrete layer. This study analyse the performance of paint mixed with various amounts of copper oxide nanoparticles and copper-based film applied to cement-based mortar immersed in seawater. The mortar is then soaked in seawater for 7 and 28 days. To measure the effectiveness of the protective layer, compressive test and scanning electron microscopy characterization are conducted to selected samples. The compressive results show that seawater decreases the compressive strength of the sample. Mortar with 7.5%-CuO-nanoparticles' protective layer shows the compressive strength during 28 days increased than one during 7 days. SEM images show that there are more unreacted calcium hydroxide (CH) in sample without protection compared to mortar with CuO-nanoparticles' protective layer; at the same time, more calcium silicate hydrate (CSH) can be examined.

KEY WORDS: concrete, coating, copper oxide nanoparticles, compressive strength, fouling, ettringite

DOI: https://doi.org/10.15407/nnn.23.03.0895

Citation:
Andrie Harmaji, Soleh Wahyudi, and Rizky Febrian Sutrisno, Effect of Copper-Oxide-Nanoparticles'-Modified Paints to Properties of Cement-Based Mortar Exposed to Seawaters, Nanosistemi, Nanomateriali, Nanotehnologii, 23, No. 3: 895–903 (2025); https://doi.org/10.15407/nnn.23.03.0895
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