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Case Studies: Prevention of Occupational Dermatosis Among Workers Exposed to Cement Dust

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The most common form of occupational dermatosis to be found among construction workers is caused by exposure to cement. Depending on the country, 5 to 15% of construction workers—most of them masons—acquire dermatosis during their work lives. Two types of dermatosis are caused by exposure to cement: (1) toxic contact dermatitis, which is local irritation of skin exposed to wet cement and is caused mainly by the alkalinity of the cement; and (2) allergic contact dermatitis, which is a generalized allergic skin reaction to exposure to the water-soluble chromium compound found in most cement. One kilogramme of normal cement dust contains 5 to 10 mg of water-soluble chromium. The chromium originates both in the raw material and the production process (mainly from steel structures used in production).

Allergic contact dermatitis is chronic and debilitating. If not properly treated, it can lead to decreased worker productivity and, in some cases, early retirement. In the 1960s and 1970s, cement dermatitis was the most common reported cause of early retirement among construction workers in Scandinavia. Therefore, technical and hygienic procedures were undertaken to prevent cement dermatitis. In 1979, Danish scientists suggested that reducing hexavalent water-soluble chromium to trivalent insoluble chromium by adding ferrous sulphate during production would prevent chromium-induced dermatitis (Fregert, Gruvberger and Sandahl 1979).

Denmark passed legislation requiring the use of cement with lower levels of hexavalent chromium in 1983. Finland followed with a legislative decision at the beginning of 1987, and Sweden and Germany adopted administrative decisions in 1989 and 1993, respectively. For the four countries, the accepted level of water-soluble chromium in cement was determined to be less than 2 mg/kg.

Before Finland’s action in 1987, the Board of Labour Protection wanted to evaluate the occurrence of chromium dermatitis in Finland. The Board asked the Finnish Institute of Occupational Health to monitor the incidence of occupational dermatosis among construction workers to assess the effectiveness of adding ferrous sulphate to cement in order to prevent chromium-induced dermatitis. The Institute monitored the incidence of occupational dermatitis through the Finnish Register of Occupational Diseases from 1978 through 1992. The results indicated that chromium-induced hand dermatitis practically disappeared among construction workers, whereas the incidence of toxic contact dermatitis remained unchanged during the study period (Roto et al. 1996).

In Denmark, chromate sensitization from cement was detected in only one case among 4,511 patch tests conducted between 1989 and 1994 among patients of a large dermatological clinic, 34 of whom were construction workers. The expected number of chromate-positive construction workers was 10 of 34 subjects (Zachariae, Agner and Menn J1996).

There seems to be increasing evidence that the addition of ferrous sulphate to cement prevents chromate sensitization among construction workers. In addition, there has been no indication that, when added to cement, ferrous sulphate has negative effects on the health of exposed workers. The process is economically feasible, and the properties of the cement do not change. It has been calculated that adding ferrous sulphate to cement increases the production costs by US$1.00 per tonne. The reductive effect of ferrous sulphate lasts 6 months; the product must be kept dry before mixing because humidity neutralizes the effect of the ferrous sulphate.

The addition of ferrous sulphate to cement does not change its alkalinity. Therefore workers should use proper skin protection. In all circumstances, construction workers should avoid touching wet cement with unprotected skin. This precaution is especially important in initial cement production, where minor adjustments to moulded elements are made manually.

 

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Construction References

American Society of Mechanical Engineers (ASME). 1994. Mobile and Locomotive Cranes: An American National Standard. ASME B30.5-1994. New York: ASME.

Arbetarskyddsstyrelsen (National Board of Occupational Safety and Health of Sweden). 1996. Personal communication.

Burkhart, G, PA Schulte, C Robinson, WK Sieber, P Vossenas, and K Ringen. 1993. Job tasks, potential exposures, and health risks of laborers employed in the construction industry. Am J Ind Med 24:413-425.

California Department of Health Services. 1987. California Occupational Mortality, 1979-81. Sacramento, CA: California Department of Health Services.

Commission of the European Communities. 1993. Safety and Health in the Construction Sector. Luxembourg: Office for Official Publications of the European Union.

Commission on the Future of Worker-Management Relations. 1994. Fact Finding Report. Washington, DC: US Department of Labor.

Construction Safety Asociation of Ontario. 1992. Construction Safety and Health Manual. Toronto: Construction Safety Association of Canada.

Council of the European Communities. 1988. Council Directive of 21 December 1988 on the Approximation of Laws, Regulations and Administrative Provisions of the Member States Relating to Construction Products (89/106/EEC). Luxembourg: Office for Official Publications of the European Communities.

Council of the European Communities. 1989. Council Directive of 14 June 1989 on the Approximation of the Laws of the Member States Relating to Machinery (89/392/EEC). Luxembourg: Office for Official Publications of the European Communities.

El Batawi, MA. 1992. Migrant workers. In Occupational Health in Developing Countries, edited by J Jeyaratnam. Oxford: Oxford University Press.
Engholm, G and A Englund. 1995. Morbidity and mortality patterns in Sweden. Occup Med: State Art Rev 10:261-268.

European Committee for Standardization (CEN). 1994. EN 474-1. Earth-moving Machinery—Safety—Part 1: General Requirements. Brussels: CEN.

Finnish Institute of Occupational Health. 1987. Systematic Workplace Survey: Health and Safety in the Construction Industry. Helsinki: Finnish Institute of Occupational Health.

—. 1994. Asbestos Program, 1987-1992. Helsinki: Finnish Institute of Occupational Health.

Fregert, S, B Gruvberger, and E Sandahl. 1979. Reduction of chromate in cement by iron sulphate. Contact Dermat 5:39-42.

Hinze, J. 1991. Indirect Costs of Construction Accidents. Austin, TX: Construction Industry Institute.

Hoffman, B, M Butz, W Coenen, and D Waldeck. 1996. Health and Safety at Work: System and Statistics. Saint Augustin, Germany: Hauptverband der gewerblichen berufsgenossenschaften.

International Agency for Research on Cancer (IARC). 1985. Polynuclear aromatic compounds, Part 4: Bitumens, coal tars and derived products, shale oils and soots. In IARC Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Vol. 35. Lyon: IARC.

International Labour Organization (ILO). 1995. Safety, Health and Welfare on Construction Sites: A Training Manual. Geneva: ILO.

International Organization for Standardization (ISO). 1982. ISO 7096. Earth-moving Machinery—Operator Seat—Transmitted Vibration. Geneva: ISO.

—. 1985a. ISO 3450. Earth-moving Machinery—Wheeled Machines—Performance Requirements and Test Procedures for Braking Systems. Geneva: ISO.

—. 1985b. ISO 6393. Acoustics—Measurement of Airborne Noise Emitted by Earth-moving Machinery—Operator’s Position—Stationary Test Condition. Geneva: ISO.

—. 1985c. ISO 6394. Acoustics—Measurement of Airborne Noise Emitted by Earth-moving Machinery—Method for Determining Compliance with Limits for Exterior Noise—Stationary Test Condition. Geneva: ISO.

—. 1992. ISO 5010. Earth-moving Machinery—Rubber-tyred Machinery—Steering Capability. Geneva: ISO.

Jack, TA and MJ Zak. 1993. Results from the First National Census of Fatal Occupational Injuries, 1992. Washington, DC: Bureau of Labor Statistics.
Japan Construction Safety and Health Association. 1996. Personal communication.

Kisner, SM and DE Fosbroke. 1994. Injury hazards in the construction industry. J Occup Med 36:137-143.

Levitt, RE and NM Samelson. 1993. Construction Safety Management. New York: Wiley & Sons.

Markowitz, S, S Fisher, M Fahs, J Shapiro, and PJ Landrigan. 1989. Occupational disease in New York State: A comprehensive reexamination. Am J Ind Med 16:417-436.

Marsh, B. 1994. Chance of getting hurt is generally far higher at smaller companies. Wall Street J.

McVittie, DJ. 1995. Fatalities and serious injuries. Occup Med: State Art Rev 10:285-293.

Meridian Research. 1994. Worker Protection Programs in Construction. Silver Spring, MD: Meridian Research.

Oxenburg, M. 1991. Increasing Productivity and Profit through Health and Safety. Sydney: CCH International.

Pollack, ES, M Griffin, K Ringen, and JL Weeks. 1996. Fatalities in the construction industry in the United States, 1992 and 1993. Am J Ind Med 30:325-330.

Powers, MB. 1994. Cost fever breaks. Engineering News-Record 233:40-41.
Ringen, K, A Englund, and J Seegal. 1995. Construction workers. In Occupational Health: Recognizing and Preventing Work-related Disease, edited by BS Levy and DH Wegman. Boston, MA: Little, Brown and Co.

Ringen, K, A Englund, L Welch, JL Weeks, and JL Seegal. 1995. Construction safety and health. Occup Med: State Art Rev 10:363-384.

Roto, P, H Sainio, T Reunala, and P Laippala. 1996. Addition of ferrous sulfate to cement and risk of chomium dermatitis among construction workers. Contact Dermat 34:43-50.

Saari, J and M Nasanen. 1989. The effect of positive feedback on industrial housekeeping and accidents. Int J Ind Erg 4:201-211.

Schneider, S and P Susi. 1994. Ergonomics and construction: A review of potential in new construction. Am Ind Hyg Assoc J 55:635-649.

Schneider, S, E Johanning, J-L Bjlard, and G Enghjolm. 1995. Noise, vibration, and heat and cold. Occup Med: State Art Rev 10:363-383.
Statistics Canada. 1993. Construction in Canada, 1991-1993. Report #64-201. Ottawa: Statistics Canada.

Strauss, M, R Gleanson, and J Sugarbaker. 1995. Chest X-ray screening improves outcome in lung cancer: A reappraisal of randomized trials on lung cancer screening. Chest 107:270-279.

Toscano, G and J Windau. 1994. The changing character of fatal work injuries. Monthly Labor Review 117:17-28.

Workplace Hazard and Tobacco Education Project. 1993. Construction Workers’ Guide to Toxics on the Job. Berkeley, CA: California Health Foundation.

Zachariae, C, T Agner, and JT Menn. 1996. Chromium allergy in consecutive patients in a country where ferrous sulfate has been added to cement since 1991. Contact Dermat 35:83-85.