Barbosa, Adriano Aurelio Ribeiro (2014) Implementing a sound power method for testing noise on masonry saw. PhD thesis, Universidade Estadual de Campinas, Brazil.
Abstract
Worldwide, noise pollution and its influence on environment and quality of life have been studied. And so, such researches have pointed out the building construction as the main responsible for disturbing sounds today. In this sector, machinery and tools have direct influence on this process. Thus, the regular use of such tools are the main concern aiming quality improvement, streamlining processes and application of technological innovations in the industry. For this reason, the study and characterization of environmental noise behavior at construction sites (due to electrical equipment) is relevant for the sector, in order to contribute to noise control actions in construction activities aiming occupational purposes and environmental comfort. The masonry saw (circular saw for granite stone) is an electrical device, regularly used on building construction for cutting and shaping floors, tiles, bricks and woods and stands out for its versatility, practicality, lightness and ergonomics. Thus, the aim of our study is to design material of proper standard condition and measurement uncertainty associated with operations and measurements to implement the method for determining sound power of noise generated by masonry saw. The method applied in this study was comparing noise levels - generated by cutting operations - and the noise of the equipment without charge, according the ISO 3744:2010 (which specifies sound levels transmitted through the air, by a method of engineering, in a free field over a reflecting plane. Results have indicated high levels of noise with the proposed standard charge and different building materials in relation to the activities of the unloaded masonry saw. The overall sound power levels obtained from operations reached 110.1 dB. The ratio of unloaded and loaded device points to differences of up to 10.0 dB. Also, results have revealed a similarity in the measurement uncertainties in masonry saw operations on different load conditions. It was possible to quantitatively assess the noise level generated during cutting operations, so proposing a standard charge for determining sound power levels. Finally, the expanded measurement uncertainty has resulted in 4.3 dB of the masonry saw in an open field over a reflecting plane. Moreover, the study represents a great contribution for analyzing noise levels from the use of portable machinery on building construction, considering the difficulties in obtaining values of sound spectra in the literature.
| Item Type: | Thesis (Doctoral) |
|---|---|
| Thesis advisor: | Bertoli, Stelamaris Rolla |
| Uncontrolled Keywords: | noise measurement; construction machinery; tools vibration noise; building materials; standardization; uncertainty |
| Index terms: | testing, noise pollution, ISO, quality of life, wood, building material, streamlining, technological innovation, comfort, vibration, construction activity, noise control, quality improvement, standardization, ergonomics, building construction, construction site |
| Subjects: | acoustic engineering, building construction, traditional and composite building materials, environmental health, public and environmental health, professional practice, occupational health and safety management, building materials, mechanical systems, performance measurement, project delivery, standards development, innovation and technology management, work location, construction operations, management |
| Topics: | Health and Safety, Construction Materials, Business Strategy, Site Management, Construction Technology, Quality Management, Design Practice, Engineering Principles, Sustainability |
| Descriptive scope: | 2 PC |
N.B. Descriptive scope is a count of how many of the five facets of empirical research are indicated by the words used in title, abstract and keywords. It is not intended as a judgement on the research; merely a count of the kind of word we would expect to indicate Phenomenon, Concepts, Theoretical framing, Empirical techniques, Analytical techniques. If all five are present, then a code of “5 PCTEA” will indicate this. If you feel the coding for this record is questionable, we welcome discussion around the terms we matched or the way we categorized them. The facet you would expect may not be coded, or a facet may be coded inappropriately. This can also bear on a larger question, of which facets should be treated as defining in construction management research. Please get in touch, and we will look at it. More details here