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International Journal of Occupational Hygiene، جلد ۶، شماره ۴، صفحات ۱۸۴-۱۹۱
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عنوان انگلیسی The Effect of Thermal Stress on Asphalt Workers’ Function and Their Physiological Parameters
چکیده انگلیسی مقاله Heat stress effects on physical and mental health of workers and decreases human function. Asphalt workers are both exposed to the heat of their working process and to the sun heat. This study aimed at evaluating thermal stress and its following function fall and the effect of asphalt work on the degree of heat stress and asphalt workers’ physiological parameters. The present study was done at the work location of 29 asphalt workers in Qum City,  central  Iran.  The  degree  of  thermal stress  was  by  WBGT  index.  The  workers’ physiological parameters such as their blood pressure and pulse rate were studied as well. In order to determine the function fall caused by thermal stress, the related graph was utilized, and the calculated data were analyzed by SPSS software. The longest heat (WBGT) exposure period of asphalt paver drivers, troweling workers, shoveling workers, and burner service workers were 31.59, 32.68, and 33.53 centigrade degrees, respectively causing the laborers’ function fall by 70, 85, and 82%. Increase in WBGT is followed by increase in the average diastolic and systolic blood pressure and pulse rate. There was found a significant relationship between WBGT in the asphalt working locations and out of asphalt working locations (P< 0.05). In addition to diseases and effects caused by thermal stress, it is a major reason for man’s function fall and efficiency decline, which eventually causes poor production. Thus, accurate planning and controlling thermal stress are required to prevent occupational diseases and improve human function.
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نویسندگان مقاله | RAMAZAN MIRZAEI
Department of Occupational Health Engineering, Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.


| ROOHALAH HAJIZADEH
Department of Occupational Health Engineering, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran.


| KEYKAOUS AZRAH
Department of Occupational Health Engineering, Faculty of Health, Gonabad University of Medical Sciences, Gonabad, Iran.


| MOHAMMADHOSEIN BEHESHTI
Department of Occupational Health Engineering, Faculty of Health, Gonabad University of Medical Sciences, Gonabad, Iran.
نشانی اینترنتی http://ijoh.tums.ac.ir/index.php/ijoh/article/view/116
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