On the use of confocal microscopy for calculating the surface microroughness and the respective hydrophobic properties of marble specimens

Tsigarida, A; Tsampali, Evangelia; Konstantinidis, Avraam; Stefanidou, Maria

doi:10.1016/j.jobe.2020.101876

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…This characteristic also makes it beneficial for adhesion applications. It is important to mention that the parameter is significantly affected by the sampling scheme, including the number of points and the spacing in the X and Y axes [27]. However, a comment needs to be made as the following: the formula presented in the standard implies that the surface is differentiable everywhere, which is not the case with fractal surfaces, as they may exhibit singularities and abrupt variations that are not represented by differentiable functions.…”

Section: Sdr Calculationmentioning

confidence: 99%

Two 3D Fractal-Based Approaches for Topographical Characterization: Richardson Patchwork versus Sdr

Berkmans,

Lemesle,

Guibert

et al. 2024

Materials

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Various methods exist for multiscale characterization of surface topographies, each offering unique insights and applications. The study focuses on fractal-based approaches, distinguishing themselves by leveraging fractals to analyze surface complexity. Specifically, the Richardson Patchwork method, used in the ASME B46.1 and ISO 25178 standards, is compared to the Sdr parameter derived from ISO 25178-2, with a low-pass Gaussian filter for multiscale characterization. The comparison is performed from the relative area calculated on topographies of TA6V samples grit blasted with different pressures and blasting materials (media). The surfaces obtained by grit blasting have fractal-like characteristics over the scales studied, enabling the analysis of area development at multiple levels based on pressure and media. The relative area is similar for both methods, regardless of the complexity of the topographies. The relevance scale for each calculation method that significantly represents the effect of grit blasting pressure on the increased value of the relative area is a tiling of 7657.64 µm² of triangle area for the Patchwork method and a 124.6 µm cut-off for the low-pass Gaussian filter of the Sdr method. These results could facilitate a standard, friendly, new fractal method for multiscale characterization of the relative area.

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Section: Sdr Calculationmentioning

confidence: 99%

Two 3D Fractal-Based Approaches for Topographical Characterization: Richardson Patchwork versus Sdr

Berkmans,

Lemesle,

Guibert

et al. 2024

Materials

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“…The influence of styrene–acrylic acid lotion on the performance of concrete was studied. It was found that the flexural strength of styrene–acrylic acid lotion cement had an increasing trend, and the maximum value at 28 days was 9.7% higher than that of the control sample [ 60 ].…”

Section: Properties Of Cement-based Materials Modified By Acrylate Lo...mentioning

confidence: 99%

Mechanism of Acrylate Emulsion-Modified Cement-Based Materials

Su,

He,

et al. 2024

Molecules

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Polymer-modified cement-based materials have been widely used in building materials. Polymers play a crucial role in improving the performance of cement-based materials. At the same time, different polymers are added according to specific special requirements to meet the needs of the industry. Therefore, this paper reviewed the research on the performance and mechanism of acrylic lotion in modifying cement-based materials. Firstly, the role of acrylate lotion in the improvement of the volume stability, mechanical properties, and durability of cement-based materials was discussed to explore the advantages and disadvantages further, optimize the application of polymer in cement-based materials according to the performance improvement, and amplify the advantages of polymer modification. Secondly, the physicochemical mechanism of acrylate-lotion-modified cement-based materials was discussed, and the products and reactants of acrylate lotion in the reaction process of cement-based materials, as well as the interaction mechanism of acrylic lotion and cement hydrates, were clarified. Cement hydration is a crucial step in exploring the mechanism of polymer-modified cement-based materials. Due to the acrylate lotion filled on the cement surface and the physical and chemical interaction between them, the cement hydration is delayed, resulting in the cement retarding phenomenon. This paper describes its mechanism. Finally, the improvement effect of acrylate lotion on the performance of cement-based materials was reviewed, the research methods of mechanism research on acrylate-lotion-modified cement-based materials were evaluated, and suggestions for future research methods were provided.

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“…On the surface of soft materials, the stylus tip could cause a scratch. White light interferometers [4,5], the focus variation method [6], and confocal microscopy [7] are the most common non-contact methods for assessing 3D roughness parameters currently accessible. Machine vision has a high measurement efficiency, a big data acquisition capacity, high measurement accuracy, and flexibility [2].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Correlation between 3D Surface Roughness and Laser Speckle Pattern for Experimental Setup Using He-Ne as Laser Source and Laser Pointer as Laser Source

Jayabarathi

Ratnam

2022

Sensors

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Correlation between 3D surface roughness and characteristic features extracted from laser speckle pattern was done using an inexpensive laser pointer and a digital single lens reflex (DSLR) camera in previous research work. There had been no comparison work done between the experimental setup which uses a laser pointer, which has a diode laser as the laser source, and the experimental setup, which uses a He-Ne laser as the laser source. As such, in the current work, a comparison study between two experimental setups was carried out. One experimental setup was using a He-Ne laser, spatial filter, and charged coupled device (CCD) camera, while another experimental setup was using a laser pointer and DSLR camera. The laser beam was illuminated at angles of 30°, 45°, and 60° from the horizontal. When a laser beam falls on the surface, the beam gets scattered, and the scattered beam undergoes interference and produces speckle patterns which are captured using a camera. Using a Matlab program, the gray level co-occurrence matrix (GLCM) characteristic features, such as contrast (GLCM), correlation (GLCM), energy (GLCM), entropy (GLCM), homogeneity (GLCM), and maximum probability, and non-GLCM characteristic features, such as mean, standard deviation (STD), uniformity, entropy, normalized R, and white-to-black ratio (W/B), were extracted and correlated with 3D surface roughness parameters. The coefficient of determination (R2) was determined for each case. Compared to the setup using a laser pointer, the setup using a He-Ne laser gave better results. In the setup using the He-Ne laser, there were correlations with a coefficient of determination R2 ≥ 0.7 at illumination angles of 30°, 45°, and 60°, whereas in the setup using a laser pointer, there were correlations with R2 ≥ 0.7 at illumination angles of 30° and 45°. Mean characteristic features had more correlations with R2 ≥ 0.7 in the case of the angle of illumination of 45° (7 out of 36 correlations) and 60° (11 out of 82 correlations), while R-normalized characteristic features had more correlations with R2 ≥ 0.7 in the case of the angle of illumination of 30° (9 out of 38 correlations) for the setup using the He-Ne laser. Correlation (GLCM) had more correlations with R2 ≥ 0.7 in the case of the setup using a laser pointer (2 out of 2 correlations for illumination angle of 30°, and 4 out of 19 correlations for an illumination angle of 45°). Roughness parameters Sa and Sq had more correlations with R2 ≥ 0.7 for an illumination angle of 30° (1 out of 2 correlations each), and Sp and Sz had more correlations with R2 ≥ 0.7 for an illumination angle of 45° (4 out of 19 correlations each) in the case of the setup using a laser pointer. The novelty of this work is (1) being a correlation study between 3D surface roughness and speckle pattern using a He-Ne laser and spatial filter, and (2) being a comparison study between two experimental setups on the correlation between 3D surface roughness and speckle pattern.

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On the use of confocal microscopy for calculating the surface microroughness and the respective hydrophobic properties of marble specimens

Cited by 10 publications

References 24 publications

Two 3D Fractal-Based Approaches for Topographical Characterization: Richardson Patchwork versus Sdr

Two 3D Fractal-Based Approaches for Topographical Characterization: Richardson Patchwork versus Sdr

Mechanism of Acrylate Emulsion-Modified Cement-Based Materials

Comparison of Correlation between 3D Surface Roughness and Laser Speckle Pattern for Experimental Setup Using He-Ne as Laser Source and Laser Pointer as Laser Source

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