Sistemas de transmisión de calor para hornos de vía seca en la fabricación de cemento
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Materials Literature
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Métodos de molienda, granulometría y resistencia desarrollada por los diferentes cementos
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Conceptos actualizados sobre la molienda del cemento
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La composición de los cementos puzolánicos y su resistencia a las aguas sulfatadas
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La determinación de la resistencia a los sulfatos de los cementos, de acuerdo con los métodos rápidos convencionales
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Influencia del yeso sobre la velocidad de hidratación del cemento portland
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Comportamiento del hormigón entre los 80 y 300 °C
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La incrustación de la alúmina y la magnesia en el silicato trlcálcico
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Un método para determinar la cantidad de cemento en mortero y hormigón
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Principios de la termofísica del horno vertical de cemento
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La carretera de hormigón
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Medidas de la estabilidad de la carcasa de los hornos de rotación "shell"
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Un método rápido para determinar la resistencia a los sulfatos de los cementos
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The crystal structure of Na2Ti3O7
The crystal structure of Na2Ti30 ~ has been determined, using single-crystal methods. The space group is P21/m, with the unit-cell dimensions a=8.571, b=3.804, c=9.135 _~, fl=101.57 .
The Efficiency of Production of Characteristic X-radiation in Thick Targets of a Pure Element
A simple theoretical expression is proposed for K quanta production in directions at large angles to the surface of a thick target, neglecting absorption. Direct and indirect production are calculated and the ratio of indirect to total production is shown to be in agreement with experimental results both in magnitude…
On the Mechanism of Cavitation Damage by Nonhemispherical Cavities Collapsing in Contact With a Solid Boundary
A perfect fluid theory, which neglects the effect of gravity, and which assumes that the pressure inside a cavitation bubble remains constant during the collapse process, is given for the case of a nonhemispherical, but axially symmetric cavity which collapses in contact with a solid boundary. The theory suggests the…
Dielectric and X-Ray Studies ofCaxBa1−xTiO3andCaxSr1−xTiO3
Ceramics of ${\mathrm{Ca}}_{x}{\mathrm{Ba}}_{1\ensuremath{-}x}\mathrm{Ti}{\mathrm{O}}_{3}$ and ${\mathrm{Ca}}_{x}{\mathrm{Sr}}_{1\ensuremath{-}x}\mathrm{Ti}{\mathrm{O}}_{3}$ have been prepared and their dielectric and structural properties investigated. Firing conditions were adjusted to obtain sharp x-ray back reflec…
RelativisticL-Shell Photoeffect
The expressions of the relativistic $L$ shell photoeffect differential and total cross sections, for the case of light elements, are established. Coulomb wave functions are used for the description of the electron states in the calculation of the matrix elements, but it is shown how the results should be corrected so…
Nature of the Ferroelectric Transition in Triglycine Sulfate
The occurrence of linewidth transitions in the proton magnetic resonance spectra of triglycine sulfate, selenate, and fluoberyllate at the corresponding Curie points demonstrates that the ferroelectric transitions in these crystals are connected with a rearrangement of the basic ionic units in the unit cell. The resul…
Behavior of Strongly Shocked Carbon
Evidence is given for the conversion of graphite to the diamond phase when it is subjected to strong, explosively generated shocks. The data lend support to a further conversion at still higher pressures to a new, higher density phase, presumably the closely-packed metallic liquid. (L.N.N.)