scholarly journals The Relationship between Roughness of Finished Wood Floors and Slip Resistance

2021 ◽  
Vol 72 (1) ◽  
pp. 49-56
Author(s):  
Josip Miklečić ◽  
Vlatka Jirouš-Rajković
Keyword(s):  
Surface Roughness ◽  
Beech Wood ◽  
Roughness Parameters ◽  
Strong Negative Correlation ◽  
Slip Resistance ◽  
Wood Flooring ◽  
Dry Conditions ◽  
Dry Water ◽  
The Relationship ◽  
Roughness Measurements

The present study investigates the relationship between the roughness of beech wood and oak wood surfaces treated with oil and polyurethane coating and the slip resistance in dry, water-wet and oily conditions. Pendulum tests were conducted for slip resistance assessment, and roughness measurements were performed by stylus instrument using Ra, Rt, Rp, Rz and Rsm parameters for surface roughness evaluation. Slip potential in dry conditions was low for all finished wood floors studied. Contamination of the surface with water and oil reduced the slip resistance of finished oak and beech flooring. The strong negative correlation was found between slip resistance on dry finished flooring and roughness parameters Ra, Rz, Rt and Rp, and positive correlation between slip resistance on water-wet finished flooring and roughness parameters Ra, Rz, Rt and Rp. Moreover, the correlations between roughness parameters Ra, Rt, Rp and Rz and slip resistance were very similar, and the roughness parameters correlated more strongly with the slip resistance on dry and water-wet surfaces than with the slip resistance on oil-wet surface. Comparison of the slip potential classifications of finished wood floors based on pendulum data and based on Rz surface roughness parameters showed that in some cases the Rz parameter appeared to overestimate the slip potential of the floors in wet conditions. The results confirm previous research that roughness measurements should only be used as a guide and should not be used as the only indicator of the slip potential of wood flooring materials.

scholarly journals Sensitivity of C-Band SAR Polarimetric Variables to the Directionality of Surface Roughness Parameters

2021 ◽  
Vol 13 (11) ◽  
pp. 2210
Author(s):  
Zohreh Alijani ◽  
John Lindsay ◽  
Melanie Chabot ◽  
Tracy Rowlandson ◽  
Aaron Berg
Keyword(s):  
Surface Roughness ◽  
Soil Moisture ◽  
Laser Scanner ◽  
Careful Attention ◽  
Roughness Parameters ◽  
Retrieval Models ◽  
Surface Roughness Parameters ◽  
The Look ◽  
The Relationship ◽  
Roughness Measurements

Surface roughness is an important factor in many soil moisture retrieval models. Therefore, any mischaracterization of surface roughness parameters (root mean square height, RMSH, and correlation length, ʅ) may result in unreliable predictions and soil moisture estimations. In many environments, but particularly in agricultural settings, surface roughness parameters may show different behaviours with respect to the orientation or azimuth. Consequently, the relationship between SAR polarimetric variables and surface roughness parameters may vary depending on measurement orientation. Generally, roughness obtained for many SAR-based studies is estimated using pin profilers that may, or may not, be collected with careful attention to orientation to the satellite look angle. In this study, we characterized surface roughness parameters in multi-azimuth mode using a terrestrial laser scanner (TLS). We characterized the surface roughness parameters in different orientations and then examined the sensitivity between polarimetric variables and surface roughness parameters; further, we compared these results to roughness profiles obtained using traditional pin profilers. The results showed that the polarimetric variables were more sensitive to the surface roughness parameters at higher incidence angles (θ). Moreover, when surface roughness measurements were conducted at the look angle of RADARSAT-2, more significant correlations were observed between polarimetric variables and surface roughness parameters. Our results also indicated that TLS can represent more reliable results than pin profiler in the measurement of the surface roughness parameters.

scholarly journals What Makes a Floor Slippery? A Brief Experimental Study of Ceramic Tiles Slip Resistance Depending on Their Properties and Surface Conditions

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7064
Author(s):  
Ewa Sudoł ◽  
Marcin Małek ◽  
Mateusz Jackowski ◽  
Marcin Czarnecki ◽  
Cezary Strąk
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Experimental Measurements ◽  
Ceramic Tiles ◽  
Main Determinant ◽  
Surface Conditions ◽  
Slip Resistance ◽  
Dry Conditions ◽  
Value Of It ◽  
The Relationship

The safety of the use of construction facilities should be a priority in today’s busy world, where it is not difficult to get involved in an accident. Most of them, due to the pace at which we live today, are caused by slips, trips, and falls. This work presents a detailed analysis of the resistance of ceramic floors to these events, taking into account the surface properties and conditions (dry/wet), which, as presented, have a significant impact on the final slip resistance values. This study also investigates the relationship between surface roughness and anti-slip properties. According to the obtained results, it can be concluded that the surface roughness is not the main determinant of slip resistance, and the final value of it is influenced by many components that should be considered together and not be neglected when designing the surface finish. Furthermore, based on experimental measurements, it can be noted that the highest slip resistance in both wet and dry conditions showed the unglazed tiles with lapatto finish and the glazed tiles without any extra finish.

Effect of Surface Roughness on Slip Resistance of Rubber

2011 ◽  
Vol 189-193 ◽  
pp. 1538-1542
Author(s):  
Li Xiao Jia ◽  
Yong Zhen Zhang ◽  
Yong Ping Niu ◽  
San Ming Du ◽  
Jian Li
Keyword(s):  
Surface Roughness ◽  
Correlation Coefficient ◽  
Correlation Coefficients ◽  
Roughness Parameters ◽  
Test Conditions ◽  
Slip Resistance ◽  
Materials Used ◽  
Almost All ◽  
Effect Of Surface

In order to decrease accidents of slips and falls, COFs of rubber samples with different surface roughness were measured by Brungraber Mark II. And the correlation coefficients between roughness parameters and COF were calculated. The rusults have shown that the COF increases with surface roughness and the correlation coefficient between Sq and COF is highest. In general, almost all the roughness parameters used in the study have high correlation with COF. Parameters had the highest correlation with COF depends on the materials used and test conditions.

scholarly journals Possibilities of applying motif group parameters for description roughness of turned surfaces

2018 ◽  
Vol 244 ◽  
pp. 01028
Author(s):  
Maciej Kowalski ◽  
Magdalena Wiśniewska ◽  
Paweł Karolczak ◽  
Jozef Holubjak
Keyword(s):  
Surface Roughness ◽  
Surface Structures ◽  
Roughness Parameters ◽  
Kinematic Parameters ◽  
Geometrical Structures ◽  
Iso Standards ◽  
Longitudinal Turning ◽  
Roughness Measurements

This article explores the methodology of assessing the applicability of roughness parameters from the motif group to the evaluation of one-way and periodic geometrical surface structures. The results of surface roughness measurements of aluminum samples turned with variable kinematic parameters were presented. Usability of using surface motifs in combination with selected parameters described in ISO standards for assessment of geometrical structures characteristic for longitudinal turning was shown.

Effect of Vanadium Addition on the Surface Roughness and Fatigue Crack Propagation in a Railroad Wheel Using Twin Disc Wear Test

2019 ◽  
Vol 391 ◽  
pp. 66-73 ◽  
Author(s):  
A.B. Rezende ◽  
G.A. Amorim ◽  
D.J. Minicucci ◽  
S.T. Fonseca ◽  
P.R. Mei
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Roughness ◽  
Wear Test ◽  
Railroad Wheel ◽  
Roughness Parameters ◽  
Small Cracks ◽  
Sliding Test ◽  
Roughness Measurements ◽  
Scanning Electron

To verify the effect of 0.13 % vanadium addition (% in weight) on the wear resistance of a railroad wheel steel with 0.7 % carbon, twin-disc rolling-sliding test were performed. These two steels were named 7V and 7C. The test discs were analyzed to verify the superficial conditions and wear mechanisms using SEM (Scanning Electron Microscopy) and roughness measurements. After 100,000 cycles running it was concluded that without the presence of debris, the 7V steel presented a reduction in 35 % the mass loss compared to 7C steel. For the 7V steel, in the test without debris, the discs presented small cracks (10 μm long), very near (3 μm deep) the surface, but in the test with the presence of debris, the disc surfaces presented delaminated material and long cracks (100 μm long) faraway from surface (up to 72 μm deep). The presence of debris also increased the roughness parameters in 7V steel: average Rz jumped from near 6 μm in the steel without debris to near 26 μm in the steel with debris.

scholarly journals The influence of titanium alloys phase composition on the surface roughness parameters obtained in the process of wire EDM

2021 ◽  
pp. 18-24
Author(s):  
A. A. Fedorov ◽  
◽  
Yu. E. Zhdanova ◽  
A. V. Linovsky ◽  
N. V. Bobkov ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Phase Composition ◽  
Titanium Alloys ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Wire Edm ◽  
Roughness Parameters ◽  
Electrical Parameters ◽  
Electrode Tool ◽  
The Relationship

The paper investigates a roughness of titanium α, α+β and β alloys, obtained by wire electrical discharge machining (EDM) with a brass electrode-tool in distilled water. The purpose of the article is to establish the relationship between the electrical parameters of wire EDM with the surface roughness α, α+β and β of titanium alloys, in particular with the group of parameters Rk. It was established by the method of contact profilometry that the phase composition of titanium alloys significantly affects the height parameters of the roughness of the treated surfaces. It was shown experimentally that the phase composition has a significant effect on the roughness parameters of the Rk group obtained in the process of EDM

Characterisation of abrasive worn surfaces by surface microtopography parameters

2014 ◽  
Vol 4 (2) ◽  
Author(s):  
I. Barányi ◽  
G. Kalácska ◽  
Patrick De Baets
Keyword(s):  
Surface Roughness ◽  
Wear Mechanism ◽  
Friction And Wear ◽  
Dual Role ◽  
Roughness Parameters ◽  
Wear Process ◽  
Functional Parameters ◽  
Surface Microtopography ◽  
Before And After ◽  
Roughness Measurements

Surface microtopography plays a dual role in the course of friction and wear processes. It affects the contact and temperature conditions, and it undergoes significant changes in accordance with the wear mechanism. The amplitude, spacing, hybrid and functional parameters of microtopographies provide opportunities for understanding more deeply the wear process. Wear experiments and surface roughness measurements before and after the wear were performed. The aim of this study was to define the availability of the roughness parameters to describe the microtopography modification during the abrasive tribological process.

Multiple Aspects of Comparing Surface Properties of Ceramic Tiles Regarding Slip Resistance

2016 ◽  
Vol 861 ◽  
pp. 129-136 ◽  
Author(s):  
Anita Terjek
Keyword(s):  
Surface Roughness ◽  
Residential Buildings ◽  
Measurement Methods ◽  
Affecting Factors ◽  
Roughness Parameters ◽  
Ceramic Tiles ◽  
Surface Conditions ◽  
Cleaning Agents ◽  
Slip Resistance ◽  
Resistance Tests

The objective of this study was to determine the affecting factors that can possibly change slipperiness of flooring. Laboratory slip resistance tests were conducted under different surface conditions. Two different methods were used to measure 6 different ceramic tiles. This article has its focus mainly on the required security and its quantification during the service life of floor coverings. Slip resistance of ceramic tiling can change with use. It is worth to investigate the effect of cleaning agents on slipperiness of floors, because it could be more dangerous when the cleaning process is in progress, so the surface is still in wet state or partly covered by liquid. This paper makes a comparative analysis on the different measurement methods and sliders that rub against the surface. In case of public and residential buildings slip resistance and surface roughness associated with cleanability, all have influence on safety in use and durability. The results showed that the perceived surface roughness parameters could be used as indicator of slipperiness and supplement objective measurement of this performance.

Evaluating Surface Roughness From Contact Vibrations

1995 ◽  
Vol 117 (1) ◽  
pp. 60-64 ◽  
Author(s):  
Daniel P. Hess ◽  
Nitish J. Wagh
Keyword(s):  
Surface Roughness ◽  
Contact Dynamics ◽  
Roughness Parameters ◽  
Average Roughness ◽  
Composite Surface ◽  
Normal Contact ◽  
Roughness Model ◽  
Contact Frequency ◽  
The Relationship ◽  
Theory And Experiments

This paper examines the relationship between the contact dynamics and the composite surface roughness of two bodies in planar contact. Measurements of the natural contact frequency are obtained for a range of surface roughness levels and normal loads from an apparatus which isolates the contact dynamics of two steel blocks from all other system dynamics. The normal contact dynamics of the contacting components are modeled with a single-degree-of-freedom system which incorporates the Greenwood and Williamson surface roughness model. Analytical and empirical expressions relating the normal natural contact frequency and roughness parameters, such as the standard deviation of asperity heights and the average roughness value, are developed. Both theory and experiments show that the contact frequency increases with a decrease in the composite roughness and vice versa; a power law relation between the contact frequency and the roughness parameters is found in most cases. The results of this work indicate that it may be possible to use contact vibration as a means for assessing or monitoring composite roughness parameters of surfaces in contact.

scholarly journals STYLUS PROFILOMETRY IN SURFACE ROUGHNESS MEASUREMENTS OF THE VERTICAL CONICAL MIXING UNIT USED IN A FOOD INDUSTRY

2018 ◽  
Vol 47 (1) ◽  
pp. 1-8 ◽  
Author(s):  
W. Kapłonek ◽  
M. Ungureanu ◽  
K. Nadolny ◽  
P. Sutowski
Keyword(s):  
Surface Roughness ◽  
Food Industry ◽  
Measurement Process ◽  
Machining Process ◽  
Technological Equipment ◽  
Roughness Parameters ◽  
Large Size ◽  
Roughness Profile ◽  
Internal Surfaces ◽  
Roughness Measurements

In the paper, use of stylus profilometry technique in measurements of surface roughness parameters of technological equipment used in the food industry has been demonstrated. The assessment of internal surfaces of the vertical conical mixing unit and its components was carried out by the use of stylus instrument Hommel-Tester T-8000 supported bythe HommelMap Basic 3.1 software. The obtained values of selected roughness (profile) parameters (Ra, Rq, Rp, Rv and Rz) as well as results of the others carried out analysis (Abbott-Firestone curves, graphical studies of Sk parameters) confirmed the correctness of machining process of the assessed surfaces, despite fact, that measurement process were complicated dueto their large size and weight.

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