This study was conducted to evaluate the properties of cement bonded particleboard made from rice husk and sawdust. Sawdust and rice husk fine boards were made using two ratios of cement and particles of 70:30 and 80:20, but rice husk coarse was made with a ratio of cement and particle of 80:20. The density of sawdust and rice husk fine boards in a ratio of cement and particles of 70:30 was 960...

Cement dust deposition on soil has been implicated in the heavy metal (HM) contamination of soil, leading to adverse effects on plants and humans. This study assessed the impact of cement dust deposition on the HM content of the soil samples in the vicinity of a cement factory and its implication on the public health of the host community. Topsoil samples were collected at varying distances and...

OBJECTIVES Based on findings from a systematic literature search, we present and discuss the evidence for an association between exposure to cement dust and non-malignant respiratory effects in cement production workers. DESIGN AND SETTING Systematic literature searches (MEDLINE and Embase) were performed. Outcomes were restricted to respiratory symptoms, lung function indices, asthma, chroni...

Five major sources for the ambient aerosol in Gainesville, FL were sampled by using a MicroOrifice Uniform Deposit Impactor (MOUDI) and a University of Washington Mark III Cascade Impactor. The samples were analyzed for carbons and ions. Soil dust, unpaved road dust, cement dust particles and marine aerosols were mainly in the coarse mode, while particles from transportation showed a bi-modal o...

OBJECTIVE to identify the association between the exposure of workers to inorganic dust in a quarry and a cement factory and pulmonary diseases. METHODS a transverse study on data from 32 quarry workers (QWs) and 57 cement production line workers (CFWs) to inorganic-dust exposure was performed. Pulmonary function tests and chest X ray were done in both groups. RESULTS there were differences...

AIMS To investigate mortality and cancer incidence of cement producing workers. METHODS A total of 2498 cement workers who have been employed at Portland cement producing departments for at least one year from 1956 to 2000 were followed up from 1 January 1978 to 31 December 2000. The cohort contributed 43,490 person-years to the study. Standardised incidence ratios (SIR) and standardised mort...

The pulmonary lesions found in silicosis were formerly thought to be due to the abrasive nature or spiked shape of the inhaled dust particles, but this theory was questioned by Gardner (1923), who demonstrated that carborundum dust is harmless. The later work of Kettle (1932) and of Denny and others (1937) was interpreted as showing that the tissue damage is due to silicic acid formed by the so...

This study was conducted in a cement factory in the United Arab Emirates to assess cement dust exposure and its relationship to respiratory symptoms among workers. A total of 149 exposed and 78 unexposed workers participated in this cross-sectional study. Information on demographic and respiratory symptoms was collected by questionnaire. Personal total dust levels were determined by the gravime...

EFFECTS OF CARBONATION ON THE MINERAL COMPOSITION OF CEMENT KILN DUST By Cecilia P. Anderson Department of Geological & Mining Engineering & Sciences