Acid soils with pH values below 5.5 have a negative effect on agricultural production. For this reason, liming is applied as measure to raise the soil optimum (pH = 6–7). The aim of our research was evaluate and compare effectiveness four materials (wood ash from biomass powerplant, filter dust cement factory, blast furnace slag iron carbocalk (limestone, by-product sugar factory)) in combinati...

introductionair pollution is the introduction of particulates, biological molecules, or other harmful materials into the earth's atmosphere, possibly causing disease, death to humans, damage to other living organisms such as food crops, or the natural or built environment. the atmosphere is a complex natural gaseous system that is essential to support life on planet earth. stratospheric oz...

  Background : Cement industry has many process units. Basically all of these units can be considered as a source of noise. Since noise pollution is defined based on its offensive hearing effects, the importance of the noise sources depends directly on the number of workers in the unit.   Materials and Methods : An experimental study has been done at Tehran cement factory to recogn...

background : cement industry has many process units. basically all of these units can be considered as a source of noise. since noise pollution is defined based on its offensive hearing effects, the importance of the noise sources depends directly on the number of workers in the unit.   materials and methods : an experimental study has been done at tehran cement factory to recognize and analyze...

The ability to produce load-bearing masonry units adopting ACI 211.1 mix design using (1:3.2:2.5) as (cement: fine aggregate: coarse aggregate) with slump range (25-50mm) which can conform (dimension, absorption, and compressive strength) within IQS 1077/1987 requirements type A was our main goal of the study. use low cement content (300 kg/m3) handle market price products since most consumptio...

strategic human resource management implications in different part of the worlds have been investigated in different research papers. the depth of implementation of shrm, results in the productivity of the organizations. the current paper is a conceptual overview on the shrm implementation in iran. the circumstances and the elements that contribute to the shrm implementation in this country nee...

The process of making cement goes through numerous phases and different procedures in order to produce that is up factory requirements. In addition the combustion process, cooling also exists manufacturing kiln area, particularly rotary kiln, but it less crucial. A crucial aspect production machinery procedure or clinker cooler. here impacts quality produced, therefore this equipment used cool ...