This study was carried out in 2011 to investigate the suitability of date palm midribs (Phoenix dactelifera L.) as a lignocellulosic material for the production of wood-cement composite panels, in addition to enhancement their compatibility with cement using various pretreatments and chemical additives. Materials used for this study were midribs of fronds of different date palm varieties availa...

The Icelandic Competition Council recently ruled that a cement supplier with 75% market share did not enjoy a dominant position. The ruling was based on countervailing power of local concrete producers. To test whether there are economic arguments for the ruling, we present a simplified model of the industry and apply and adapt some recent work on bilateral oligopoly. We show that, in equilibri...

A Portland cement plaster wall system has many positive features, but one of the physical properties that it does not possess is flexural strength. It is because of the inability of the Portland cement plaster membrane to bend or flex that glass fiber strands were used in Portland cementbased plaster. There are various types of synthetic fibers on the market that will provide flexural strength ...

OBJECTIVES This cross-sectional study aimed to determine the effects of exposure to cement dust on Fractional Exhaled Nitric Oxide (FeNO) in non-smoking cement mill workers. SUBJECTS AND METHODS We recruited 121 apparently healthy male volunteers, 90 of them were non-smoking cement mill workers and 31 non-smoking un-exposed subjects served as control. The mean age of cement mill workers was 3...

ctmada, Illichlgan, New York, Sweden, etc. Existing when properly operated, can destroy most organic v.n the moat complex chlorinated hydrocarbons, be completely destroyed during normal cement kdmal emlsslons to the environment. Burning in cen?8nl kilns, and other mineral Industries, o both industry, who generates such wastes, nd Wvemment, who want to dispose properly of such , mrfromnentally a...

The cement industry is one of the most energy and carbon-intensive industries. The energy and carbon reduction is an important issue in this industry. The present work considers the use of alternative fuels in the cement kilns. The amounts of excess air, the location of fuel and air entrance, as well as the amount of produced gas stacks, are the main design and operational variables in the kiln...

Problems relating to disposal of sludge accumulating at waste-water treatment plants (WWTP) in Croatia are described in the paper. The possibility and adequacy of using ash obtained through incineration of sludge is considered. A special emphasis is placed on the significance of ash in concrete industry during production of cement mortar and concrete. Results of worldwide research conducted so ...

Sustainability and the UK cement industry Traditional Portland cement-based concrete provides the foundation for the built environment. Buildings constructed appropriately and imaginatively from this material can and do exhibit an impressive array of properties [1] especially those that have been designed to optimise the thermal mass of concrete [2]. This type of concrete building is expected t...