A study on the dependence of PEMs acoustic properties on incidence angle

Praticò, Filippo Giammaria; Vaiana, Rosolino; Fedele, Rosario

doi:10.1080/10298436.2014.943215

Cited by 15 publications

(6 citation statements)

References 19 publications

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“…Two longitudinal and three crosswise sections were identified on each specimen by means of a preset mask to carry out profilometric analysis of stone surface texture by means of a laser profilometer based on conoscopic olography before and after polishing (see Figures 2 and 3). Profiles were traced by using a lens with an objective focal length of 50 mm and a sampling resolution of 5 µmm (20 points per millimeter on each profile) [26,27]. This procedure was carried out in order to focus the investigation on PSV tire/test specimen interface (PSV, polished stone value according to the UNI EN 1097/8 2001, see Section 2.2).…”

Section: Methodsmentioning

confidence: 99%

Microtexture Performance of EAF Slags Used as Aggregate in Asphalt Mixes: A Comparative Study with Surface Properties of Natural Stones

et al. 2019

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Steelmaking industries produce a large amount of solid wastes that need to be adequately managed in order to ensure environmental sustainability and reduce the impact of their disposal on earth pollution. Electric arc furnace (EAF) slags are those wastes deriving from secondary steelmaking production; these slags can be re-used and recycled in many industrial applications such as the production of asphalt mixes. In this paper authors investigate the surface performance of EAF slags used as second-hand aggregate in asphalt mixes. In particular, slags behavior under polishing is compared to other types of aggregate commonly used for asphalt concrete such as limestone, basalt, and kinginzite. Several devices (skid tester, laser profilometer, polishing machine) were used to collect experimental data; the analysis of microtexture was carried out by comparing aggregate surface performance before and after polishing. Results show that EAF slags are positively comparable to basalt as concerns the polishing behavior; good correlations between skid resistance and some microtexture indicators are also carried out.

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Section: Methodsmentioning

confidence: 99%

Microtexture Performance of EAF Slags Used as Aggregate in Asphalt Mixes: A Comparative Study with Surface Properties of Natural Stones

et al. 2019

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“…Bulk specific gravity ranged between 2.38 ± 0.04 g/cm 3 . A Laser Profilometer based on conoscopic holography (Praticò et al 2014) was used and texture indicators were evaluated according to the ISO Standard 13473-3 (see Fig. 4).…”

Section: Methodsmentioning

confidence: 99%

Surface Performance Characterization of Single-Layer Surface Dressing: A Macrotexture Prediction Model

2015

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Bituminous surface treatments (seal coats, chip seals, etc.) are pavement wearing courses created using asphalt binder and aggregate. They can be applied to an existing pavement or to a base course. They can act as a waterproof, skid resistant layer, sealing cracks and raveled surfaces and increasing reflection properties of road surfaces. Their expected life ranges from two to five years and are widely used in flexible pavements maintenance and rehabilitation because of reduced costs and the easiness of application. One of the most important characteristics of bituminous surface treatments is their macrotexture (initial and over time). Indeed, it affects tire-pavement interaction in wet and dry conditions and can interact with other characteristics and distress (aggregate embedment, loss of cover aggregate, streaking, bleeding, etc.). This paper focuses on the evaluation of surface performance of laboratory slabs, produced through a single-surface dressing. Macrotexture depth was measured by the Sand Patch method. A laser profilometer was also used to survey slabs texture and both aggregate descriptors and texture levels were evaluated. Finally, skid resistance and drainability data were measured by means of the British Pendulum Tester and the Belgian Permeameter, respectively. Aggregates of different size were selected in order to investigate on the relationship between aggregate dimensions and surface performance. A model was developed, implemented and validated. Results are expected to benefit both practitioners and researchers.

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“…When analyzing with other methods, the possible angle of incidence of the sound wave must be considered when testing and estimating the sound absorption coefficient. There are literature studies that confirm the effect of the incidence angle on the value of the sound absorption coefficient [20].…”

Section: Introductionmentioning

confidence: 95%

Investigation of Acoustic Properties of Different Types of Low-Noise Road Surfacers under In Situ and Laboratory Conditions

et al. 2022

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Current literature on the performance characteristics of road surfaces is primarily focused on evenness, roughness and technical durability. However, other important surface properties require analysis, including noisiness, which is an important feature of the environmental impact of vehicular traffic around roads. This can be studied using various methods by which road noise phenomena are investigated. The method used to measure the noise performance of road surfaces herein is the Statistical Pass-By (SPB) method, as described in ISO 11819-1:1997. The impedance tube method was used for sound absorption testing, as described in ISO 13472-2:2010. These tests were performed under a variety of conditions: in situ and in laboratory. The existence of relationships between them can be helpful in selecting surfaces for noise reduction. Preliminary surface noise tests can be performed in the laboratory with samples consisting of various compounds. This is less expensive and faster than doing so on purpose-built surfaces. The paper presents study results for sound absorption coefficients of various types of low-noise surfaces in in situ conditions (on an experimental section and on operated road sections) and in the laboratory setting. The results of the tests performed on the operational sections were compared to the results of the surface impact on road noise using the SPB method. The correlations between the test results help confirm the feasibility of road surface pre-testing in the laboratory and the relation to tests performed using the SPB method under typical operating conditions.

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A study on the dependence of PEMs acoustic properties on incidence angle

Cited by 15 publications

References 19 publications

Microtexture Performance of EAF Slags Used as Aggregate in Asphalt Mixes: A Comparative Study with Surface Properties of Natural Stones

Microtexture Performance of EAF Slags Used as Aggregate in Asphalt Mixes: A Comparative Study with Surface Properties of Natural Stones

Surface Performance Characterization of Single-Layer Surface Dressing: A Macrotexture Prediction Model

Investigation of Acoustic Properties of Different Types of Low-Noise Road Surfacers under In Situ and Laboratory Conditions

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