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Reactivity of high alumina cement in water: Pore solution and solid phase characterization
The hydration reaction of high alumina cement at a temperature of 20 ºC and water/cement ratio of 0.5 has been studied over a period of one month. The changes of the solid phase were followed by X-ray diffraction and thermal analysis. Besides, pore-solution was expressed by application of high mechanical pressure (500…
Calcium aluminate cement concrete: durablllty and conversión. A fresh look at an old subject
This paper re-examines the relationship between durability and conversion of calcium aluminate cement concretes, CACC. Conversion is a natural and inevitable process whereby these materials reach a stable mature condition. Numerous structures built more than half a century ago remain serviceable and in service today.…
The application of thermal analysis to the hydration and conversión Reactions of calcium alumínate Cements
The hydration of calcium aluminates cements is dominated by that of CA, CaAl2O4, which is a major constituent of all of them. At ambient temperatures, CAH10 and an amorphous phase are formed initially, but these are metastable and slowly (or more rapidly if exposed to higher temperatures) transform into C3AH6 and gíbb…
Partikelgrößenmeßtechnik im Vergleich Schwerpunkt: Laserbeugung und dynamische Lichtstreuung / Laser diffraction and dynamic light scattering: Particle analysers compared
Druckschriften / Literature
Neuheiten/Products
Veranstaltungen / Calendar
A modo de Editorial
Referate/Abstracts
Biorheologen treffen sich in Japan / Biorheologists meet in Japan
Noticias
Inhalt / Contents
Neues Meßverfahren zum Bestimmen des Geliergrads von PVC / New method for determining the degree of gelation of PVC
Probleme / Problems
Von der Morphologie zur Prozeßoptimierung / From Morphology to Process Optimisation
The most suitable techiniques and methods to identify high alumina cement and based portland cement in concretes
Instrumental techniques are indicated and the most adequated methodologies for determining the nature of the binder in concretes are explained. These methods are: a) Determination of the Silicic Moduli through chemical analysis of the sample. This test reveáis very different valúes between cement portland based concre…
Energetische Untersuchungen zum rheologischen Verschleiß von Schmierfetten / Energy investigations of the rheological wear of lubricating greases
Brevier / Brevier
Influence of metal–metal interaction on magnetic and redox properties in different series of heterodinuclear copper(II), nickel(II), and zinc(II) complexes
Different series of heterodinuclear complexes, viz.,|CuNiL](ClO 4 ) 2 •nH 2 O,[CuZnL](ClO 4 ) 2 •nH 2 O,[NiCuL](ClO 4 ) 2 •nH 2 O, and [NiZnL](ClO 4 ) 2 •nH 2 O complexes where L is a dinucleating Schiff base ligand derived from the condensation of 1 mole of 2-hydroxy-5-methylbenzene-1,3-dicarbaldehyde, 1 mole of 1,3-…