A study of the causes of volume changes in cement paste
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Materials Literature
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Determination of the proportions of slag and cement or lime in a mix of these materials
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An empirical approximate method to calculate kiln capacity
No available
On the methods to study the durability of hydraulic cements
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Identification and elimination of moulding defects in the brick industry
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New results and recent studies on concrete flow
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Initial calculation of the compression strength of concrete from the compression strength of normalized cement mortar, according to DIN 1 164 E (ISO test method)
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Core-electron binding energies for compounds of boron, carbon, and chromium
Boron 1~ and chromium 3E binding energies have been measured for 25 boron compounds and 17 chromium compounds.The data correlate linearly with calculated atomic charges.A linear correlation is also demonstrated for CNDO~calculated atomic charges and carbon 1~ binding energies determined by other workers.
Thermal properties of concrete at elevated temperatures
The practice of regarding the thermal properties of concrete as constants may lead to serious errors in heat flow calculations. Because of the physicochemical instability of concrete it is very difficult to procure valid experimental information. In this paper theoretical considerations are presented which, together w…
Exchangeable Aluminum As a Criterion for Liming Leached Mineral Soils
Abstract Lime rates equivalent to the amount of exchangeable Al reacted primarily with the exchangeable Al and reduced the Al saturation of the effective CEC to less than 30%. Lime rates greater than the equivalent amount of exchangeable Al resulted in appreciable amounts of nonexcharigeable acidity being neutralized.…
Ring Closure and Local Conformational Deformations of Chain Molecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRing Closure and Local Conformational Deformations of Chain MoleculesNobuhiro Go¯ and Harold A. ScheragaCite this: Macromolecules 1970, 3, 2, 178–187Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs…
Rheological Properties of Anionic Polystyrenes. I. Dynamic Viscoelasticity of Narrow-Distribution Polystyrenes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRheological Properties of Anionic Polystyrenes. I. Dynamic Viscoelasticity of Narrow-Distribution PolystyrenesShigehara Onogi, Toshiro Masuda, and Keishi KitagawaCite this: Macromolecules 1970, 3, 2, 109–116Publication Date (Print):March 1, 1970Publication History Published…
Polymerisation of Allyl Compounds
The review deals with the advances in the theory of the formation of allyl polymers and their practical applications. Until recently there was only limited interest in allyl polymers because with the usual free-radical initiation allyl compounds polymerise with difficulty and yield polymers with a low molecular weight…
Influence of Interactions Between Impurities on the Appearance of Magnetic Moments in Copper-Cobalt Dilute Alloys
A simple model is used to describe the magnetic properties of cobalt impurities in copper. Isolated impurities are nonmagnetic with a high spin-fluctuation temperature. Isolated pairs of neighbor cobalt atoms are very nearly magnetic: This gives rise to a large susceptibility and a large electronic specific heat, vary…
Biaxial Liquid Crystals
Convergent light observations have been made on three liquid crystalline substances with nematic and smectic phases. The nematic phase was observed to be uniaxial as expected, but smectic $C$ was found to be biaxial. The optic axial angle $2V$ for smectic $C$ was found to be on the order of 20\ifmmode^\circ\else\textd…
Electron Population Parameters from Least-Squares Refinement of X-ray Diffraction Data
A least-squares refinement of x-ray diffraction data has been developed in which the parameters are the populations of atomic orbital products describing the molecular electron density distribution. The procedure is applied to alpha-oxalic acid dihydrate and cyanuric acid. Complementary structural information obtained…
On the mechanism of the alternate copolymerization of phenyl isocyanate with ethylene oxide
Abstract The mechanism of the alternate copolymerization of phenyl isocyanate with ethylene oxide was investigated. Several experimental results show that this copolymerization proceeds according to an anionic coordinated mechanism. As for alternate copolymerization three mechanisms are generally considerable as follo…
Luminescence in the alkali metavanadates
The luminescence efficiency of the alkali metavanadates has been reported to increase by several orders of magnitude in the cation series from Na to K to Rb to Cs. Measurements of luminescence efficiency and decay time as a function of temperature show that maxima occur in the luminescence efficiency at 300, 200, and…
Observation of Surface Bound State and Two-Dimensional Energy Band by Electron Tunneling
Using electron tunneling, we have made direct observation of a surface bound state of electrons localized in a narrow accumulation layer at the InAs-oxide interface. The Landau-level structure of the two-dimensional energy band, associated with the bound state, has been studied in a magnetic field up to 85 kG.