Precision X-ray diffraction and X-ray phase analysis of clinkers from Russian cement plants

The structural model of alite was made more exact, and polymorphic modifications of belite for clinkers from Russian cement plants were redefined according to a synchrotron diffraction experiment. The results are used to solve the problems of routine X-ray phase analysi...

Devices for the determination of dispersion and particle size distribution of materials

The requirements for instruments used in determining the dispersion and particle size distribution of granular and powdered materials, potential and specifications of such equipment — vibrating screens, Blaine apparatuses and laser particle size analyzers are considered...

Effect of carbonate-containing additives on the properties of composite cements

The effect of limestone and dolomite additives on the properties of composite cements: water demand, setting time, consolidation deformation, the content of free Ca(OH)2 in the products of hardening, strength and resistance to carbon dioxide attack are examined....

Hydration of C3S and C-S-H-phase structure: new approaches, hypotheses and data

A review of recent research, developing further the understanding of kinetics and mechanism of C3S hydration, and the microstructure and the crystal lattice of the hydration products.

Effect of water-cement ratio on the kinetics of heat release of cements

The effect of water-cement ratio (W/C) on the kinetics of heat release during hydration of cements with different mineralogical composition has been studied. Lower W/C results in a significant reduction in heat release both in the early and late periods. The mor...

The use of polymeric materials for improvement of the quality of well cements

The influence of polymer additives in the form of polymer dispersions and redispersible polymer powders on the technical characteristics of oilwell Portland cement was examined. It was found that with introduction of these additives in the cement in the course of curing...

An installation for the preparation of wastes for use as fuel at the cement plant in Spain

A project to use waste as fuel by installing a Vecoplan FuelTrack equipment at the Cimentos Molinos Industrial factory, Spain, is described. The design, the working principle and advantages of the equipment and facilities are reviewed. Modular approach to the design of ...

On the synthesis of slag-lime binder based on self-loosening blast furnace slag.

As a result of the lead thermodynamic calculations the most probable ways of course of reactions hardening developed in slag-alkaline binding material have been studied. It is established that during hardening insoluble and low-soluble phases — low-basicity hydrosilicat...

Development of C—S—H microstructure in ultra high performance concrete with QENS, 29Si NMR and XRD

Ultra High Performance Concrete (UHPC) is an innovative building material whose high strength is advantageous for future applications in highly filigree structural members and even as a replacement for steel building components. The mechanical and chemical prope...

Setting and hardening accelerators for sprayed concrete

The requirements placed on modern accelerators for shotcrete are not only that they should provide virtually instant setting of concrete mixes and early strength at a moderate price, but also that they should not have any adverse effect on the properties of mature concr...

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