Results 171 to 180 of about 4,732 (219)

Calculations of Portland cement clinkering reactions

Advances in Cement Research, 2000
Calculations have been undertaken of both equilibrium and non-equilibrium chemistry of relevant parts of the CaO—Fe2O3—Al2O3—SiO2 system and related reactions in the gas phase. The examples provide new insights into topics of current concern in the manufacture of Portland cement, including the early stages of melting, the undesirable retention of lime,
T. I. Barry, F. P. Glasser
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Portland Cement Clinker

2014
This chapter is composed of five sections: 2.1. Portland cement clinker burning, 2.2. The phase systems important for cement chemistry, 2.3. The clinkering process in industrial mixes, 2.4. Thermochemistry of clinkering process, 2.5. Phase composition of Portland cements. Clinkering process can be divided in two stage: the reactions in the solid state,
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Thermoelasticity of belite in Portland cement clinker

Cement and Concrete Research, 1998
Abstract Belite crystals, separated from an industrial cement clinker, were examined by high-temperature powder X-ray diffractometry. We determined the starting and finishing temperatures of the α′ L -to-β martensitic transformation and those of the reverse (β-to-α′ L ) transformation.
K Fukuda, S Ito, H Taguchi
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Utilization of steel slag for Portland cement clinker production

Journal of Hazardous Materials, 2008
The aim of the present research work is to investigate the possibility of adding steel slag, a by-product of the conversion of iron to steel process, in the raw meal for the production of Portland cement clinker. Two samples of raw meals were prepared, one with ordinary raw materials, as a reference sample ((PC)(Ref)), and another with 10.5% steel slag
P E, Tsakiridis, G D, Papadimitriou, S, Tsivilis, C, Koroneos   +3 more
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Investigations on high SO3 portland clinkers and cements I. Clinker synthesis and cement preparation

Cement and Concrete Research, 1996
Abstract Portland clinkers containing side by side the phases C3S, and C4A3s and optionally also C4AF and C2S, ay be produced by burning pertinent raw meals with added small amounts of CaF2 to temperatures 1250–1300 °C. Such clinkers exhibit a significantly improved grindability as compared to ordinary portland cement clinker.
I. Odler, H. Zhang
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Phase identification of alite in portland cement clinker

Cement and Concrete Research, 1982
Abstract Unequivocal phase identification of alite in portland cement clinker has been made by combined use of microscopy during heating, X-ray powder diffraction, and differential thermal analysis. Alite thus far assigned to M 1b by X-ray powder diffractometry, in reality, gives every indication of being M 3 . Only M 1a should therefore be denoted
I. Maki, K. Kato
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Properties of Portland clinker and cement

This chapter deals with chemical and physical properties other than ones for which the nature of the hydration products must be considered. In general, properties of the whole clinker or cement are alone considered, those of the constituent phases having been dealt with in Chapter 1, but factors affecting the reactivities of these phases are included.
Ian G Richardson, HFW Taylor
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Electron microprobe analysis of portland cement clinkers

Cement and Concrete Research, 1979
Abstract Using modern electron microprobe techniques, we have undertaken a detailed composition analysis of all the major phases in portland cement. A preferential incorporation of certain elements into either alites or belites is confirmed, and compared to existing ideas on alite decomposition. In addition the composition data are discussed in terms
A. Ghose, P. Barnes
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An Unusual Form of Belite in Portland Cement Clinker

Journal of the American Ceramic Society, 1981
Potassium‐rich structures around the edge of a fissure in a portland cement clinker have been found to have compositional and structural properties similar to those of dendritic bellies. However, the potassium levels surprisingly exceed the accepted solubility limit.
A. Ghose, P. Barnes
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Microwave clinkering of ordinary and colored portland cements

Cement and Concrete Research, 1996
Abstract Regular and colored cement clinkers were prepared by microwave processing at 2.45 GHz. Microwave enhancement in clinker reaction was observed. The preliminary results show that microwave processing can lower the clinkering temperature by about 100 °C compared to the samples processed in a fast-heating electric furnace.
Yi Fang, Della M. Roy, Rustum Roy
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