When the Packaging Ordinance came into force on 01.01.1993, the German economy was bound by law for the first time to return packaging after use and play an active role in its disposal. Since then the ordinance has been continually refined – most recently with the introduction of the seventh amendment – in order to constantly improve the process of returning packaging and prevent abuse of the system.
Researchers from the École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland together with partners from three prominent Indian Institutes of Technology – IIT Delhi, IIT Madras and IIT...
Cement manufacturing is one of the most aggressive of all production processes. The chemicals used to produce Portland and Masonry cement – particularly silicates, aluminates and aluminoferrites – can combine to create high levels of very fine particles, creating significant problems for production and handling equipment. Rotating components are at greatest risk, and they are commonly found in the motors, pumps and fans used in crushers, mills, precipitators, kilns and silos. ...
nfluenced by the current Chinese annual growth rate, which is more than one percent and an urbanization rate of more than 70 %, the demand for cement is at a peak.
High availability and absolute reliability top the list of demands placed by plant owners on their machines. Tough requirements are thereby placed on the materials, the service life, the ...
Schwenk Zement KG, headquartered in Ulm/Germany, planned to replace its old drag chain conveyor line with a modern pipe conveyor from the Beumer Group. Requiring a solution that would transport alternative fuels such as crushed plastic material, textiles and paper from the warehouse to the feeding system of the oven in their cement plant in Bernburg/Saxony-Anhalt ...
Using a Loesche VRM, trials were carried out in order to determine the extent to which the constituents of concrete waste could be made suitable by a special recycling process for use as a substitute for the natural rock fraction in components. In this process, the employment of suitable separation equipment played a crucial role.
Research results suggest that the use of nanographite in the CFA-C system and the pure cement system accelerate the setting time and increase the strength gains, hence overweighing any negative effects. The water absorption, apparent volume, apparent density, CH-content, setting time, fluidity and strength gain are favourable when compared to pure cement and nanographite-blended cement. Part 1 discusses materials and methods, whereas Part 2 will focus on the results and conclusions.
Silicone based products find widespread use in the construction industry due to the unique properties embodied in the molecular structure. The article provides an insight into the chemistry.
