This research entails the extent of up-gradation of Dandot coal, using conventional gravity based sink-float separation techniques, to make it technoeconomically acceptable for the cement industry as a partial substitution of imported coal. In this research, various sizes of run-of-mine coal samples were subjected to specific gravity based sink-float test and resultant fractions were analyzed. ...

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...

Industrial energy consumption lies between 30% and 70% of the total energy consumed in selected countries. Cement production is one of the most energy intensive industries all around the world. This paper deals with an energy audit analysis in a cement plant in Iran. In all recent works, after performing an energy audit, different strategies are offered to reduce energy losses. Generally, these...

in this paper, the effect on the strength properties of high strength concrete (hsc) manufactured with silica fume (sf) and ground pumice (gp) is investigated. portland cement was replaced with sf, gp and combination of sf and gp up to 25%. 22 different concrete mixtures with these replacement ratios were produced by using 0.25 water-binder ratio. the ultrasound pulse velocity, compressive, spl...

Background & Aims: Diabetes mellitus is a chronic metabolic disorder that in the long-term is accompanied with deficits in learning, memory, and cognitive skills. Due to the existing evidence regarding the anti-diabetic potential of acetyl-L-carnitine (ALC), the effect of its long-term administration on learning and spatial memory deficits was investigated in diabetic rats. Methods: In this exp...

This study was conducted to isolate an acid-producing, alkaliphilic bacterium to reduce the alkalinity of cement industry waste (cement kiln dust). Gram-positive isolate KG1 grew well at pH values of 6-12, temperatures of 28-50°C, and NaCl concentrations of 0-16% and thus was further screened for its potential to reduce the pH of an alkaline medium. Phenotypic characteristics of the KG1 isolate...

Multiple sclerosis (MS) is an autoimmune disease of the central nervous system (CNS) characterized by inflammatory and neurodegenerative processes. One of its pathophysiological hallmarks is demyelination, a consequence of oligodendroglial cell death leading supply shortfall and missing electrical insulation to axons. Demyelination induced consequences on neuronal network activity and subsequen...

Gelation and densification of calcium-silicate-hydrate take place during cement hydration. Both processes are crucial for the development of cement strength, and for the long-term evolution of concrete structures. However, the physicochemical environment evolves during cement formation, making it difficult to disentangle what factors are crucial for the mechanical properties. Here we use Monte ...