Issue №1, 2016
Ukrainian cement industry. Results of operations in the 1st two months of 2016
The volume of major products of cement enterprises of Ukraine for the 2015 year, as well as data on cement and clinker production, cement sales (by brands), the consumption of cement by region indicated in the tables.Section: Ukrainian pages |
Keywords: cement and clinker production in Ukraine, cement sales, cement consumption by regions of Ukraine |
A contribution to understand the retarding effect of superplasticizers on tricalcium silicate hydration
The usage of superplasticizers for concrete production is beneficial in terms of workability and water reduction. Therefore, superplasticizers enable the production of concretes with increased flowability and high strengths. On the other hand, superplasticizers are also...Author: T. Sowoidnich, C. Roessler, H.-M. Ludwig |
Section: Science and production |
Keywords: tricalcium silicate, superplasticizers, dissolution, crystallization |
Thermal activation and pozzolanic reactivity of calcined clay minerals for applications in Portland cement blends
In this paper, results of a solid-state nuclear magnetic resonance (NMR) analysis of white Portland cements blended with different calcined clays are reported. 27Al and 29Si MAS NMR spectra of blends before and after hydration have been acquired. Compressive str...Author: J. Skibsted, Z. Dai, K.E. Rasmussen, N. Garg |
Section: Science and production |
Keywords: solid-state NMR spectroscopy, white Portland cement, calcined clay, kaolinite, metakaolin, montmorillonite |
Performance of cements with calcined clays as main constituent
Pozzolanic properties of calcined clays of various mineral composition mixed with four different CEM I Portland cements were examined. It was found that the firing temperature has a great influence on the specific surface area of clay and, as a consequence, the water de...Author: S.E. Schulze, J. Rickert |
Section: Science and production |
Keywords: pozzolanic cement, pozzolanic material, calcined clay, hydration |
Mechanical impact in grinding as a factor determining the quality characteristics of cement
Methods of mechanical action on the material ground in ball mills and vertical roller mills are fundamentally different from each other. These differences affect the particulate composition of the products, the geometric form and nature of the surface of individual part...Author: I.A. Zlobin, O.S. Mandrikova, I.N. Borisov |
Section: Science and production |
Keywords: grinding systems, vertical roller mill, ball mill, particle size distribution, particle shape, particle surface, cement quality |
Influence of the particle size of components of the raw material mixture on the processes of clinker melt formation
Using coarsely ground slurries is one of the reserves to improve the performance indicators of cement production. Conventional division of the raw material mixture into a coarse and a fine part and analysis of physical and chemical processes that occur during heating of...Author: V.A. Lotov, Y.G. Kozlovsky |
Section: Science and production |
Keywords: sludges, dispersion, roasting, melt capillary impregnation |