Affiliations: [a] Department of Mechanical Engineering, University of Coimbra, Coimbra, Portugal | [b] Department of Mechanical Engineering, Coimbra Institute of Engineering, Polytechnic Institute of Coimbra, Coimbra, Portugal
Correspondence:
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Corresponding author: Divo A. Quintela, ADAI-LAETA, Department of Mechanical Engineering, University of Coimbra, Pólo II, 3030 - 788 Coimbra, Portugal. Tel.: +351 239790719; Fax: +351 239790732; E-mail:[email protected]
Abstract:
BACKGROUND: The assessment of heat stress in the ceramic industry
is a matter of great concern for safety and health of workers. For
this purpose working conditions in the last two decades are analysed. OBJECTIVE: To study occupational hot thermal environments in the
Portuguese ceramic activity sector in 8 industrial units and 21 workplaces. METHODS: In order to characterise the level of heat exposure, the
method proposed by ISO 7243 (1989) based on the Wet-Bulb Globe Temperature
(WBGT) index was adopted. RESULTS: Two field surveys, one carried out in 1994 and the other
in 2012 are considered. The WBGT mean values varied between 23.7 and
37.8°C in the 1994 survey while in 2012 those values ranged from 21.5
to 30.5°C. In the 1994 evaluations 5 out of 8 (62.5%) of the
workplaces present heat stress conditions whereas in the 2012 assessments
the corresponding value is 46.2% (6 out of 13 workplaces). CONCLUSIONS: Despite two decades between the two surveys, the
results highlight that the overall thermal conditions of the workplaces in
the ceramic sector are still quite similar, suggesting that the working
conditions have not changed enough, a conclusion that asks for further
analysis and improvements.
Keywords: Health and safety, heat stress, WBGT index, industrial units, ceramics
