The use of elastomer additives to solve the problems in oil well cementing has been investigated in recent years by several research groups in the petroleum industry. This study includes the laboratory examination of the effect of elastomer additives on the physical properties of heavy-weight oil well cement. In the research process, a candidate well is selected and the properties of the cement...

SUMMARY: Exposure to cement dust has been linked to lung function impairment. However, there are few such studies in Nigeria. The main aim of this study was to assess the post-work Peak Expiratory Flow Rate (PEFR) of workers in a cement company. Sixty workers in a cement factory were randomly selected; thirty were regarded as workers exposed to cement dust and the remaining as unexposed workers...

In the cellulose industry the Kraft process is widely used to produce cellulose. This process generates huge volumes of inorganic solid wastes, including the grits waste. In Brazil, the final disposal of this solid waste is of high economical and environmental interest. The present work assesses the influence of the addition of grits waste on the densification behavior of soil-cement bricks. Th...

Cement is a fine powder used to bind sand and stones into a matrix of concrete, making up the world's most frequently used building material in the construction industry. First described by Ramazzini in his book "De Morbis Artificia Diatriba" in 1700, the effect of cement on the skin was presumed to be due to contact dermatitis. The first cement burns case was published by Rowe and Williams in ...

Cement dust exposure is associated with increased respiratory impairment. As the major occupational hazard in the cement production industry is cement particles, our aim was to more thoroughly examine the acute effects of occupational exposure to cement dust on the respiratory system. A cross-shift study was conducted in a cement factory in Iran. 100 high exposed workers from production and pac...

An oil and gas well cementing in Gachsaran formation, where sustained annular pressure has been reported in many wells, presents a big challenge in Maroon field. The main challenges are preventing gas migration and achieving zonal isolation using a competent cement sealant system which is able to withstand downhole stresses and high temperatures during production cycles. Unlike conventional cem...

BACKGROUND With increasing industrialization, the construction industry provides employment to a large number of skilled and nonskilled workers, many of them migrant workers. AIM This study was undertaken to provide epidemiological data regarding various dermatoses among migrant construction workers in India as currently there is a paucity of the same. METHODS One thousand construction work...

Member of Torabinejad Dental Research Center and Assistant Professor, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran Member of Dental Materials Research Center and Assistant Professor, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran Assistant Professor, Department of Restorative De...

1Department of Internal Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran 2Department of Pathology, Isfahan University of Medical Sciences, Isfahan, IR Iran 3Nickan Research Institute, Isfahan, IR Iran 4Medical Plants Research Center, Shahrekord University of Medical Sciences, Shahrekord, IR Iran *Corresponding Author: Mahmoud Rafieian-Kopaei, Medical Plants Research Center, Sh...