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Wyznaczanie ciepła hydratacji cementu metodą semi-adiabatyczną według normy europejskiej PN-EN 196-9

Zielenkiewicz W., Utzig E.

Cement Wapno Beton

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2006

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R. 11/73, nr 3

202-208

PL

Przez wiele lat obowiązującą w Polsce metodą pomiaru ciepła hydratacji cementu była standardowa metoda z użyciem różnicowego kalorymetru semi-adiabatycznego. Wdrożona została ona w Instytucie Przemysłu Wiążących Materiałów Budowlanych przez Instytut Chemii Fizycznej Polskiej Akademii Nauk, który w oparciu o uzyskany patent wykonał odpowiednie przyrządy (kalorymetry KRM). Obecnie metoda wyznaczania ciepła hydratacji cementu musi być zgodna ze stosowanymi w krajach Unii Europejskiej. By uniknąć kosztownych zmian w oprzyrządowaniu Instytut Chemii Fizycznej skonstruował układ kalorymetryczny spełniający wymagania normy europejskiej, przy zachowaniu korzystnych rozwiązań konstrukcyjnych zastosowanych w kalorymetrze KRM. W artykule podano opis przyrządu i przedstawiono metodę przeprowadzania pomiaru.

EN

In Poland for many years as the method for measuring heat of cement hydration a standard method using the differential semi-adiabatic calorimeter has been in force. This method was implemented in the Binding Materials Industry Institute by the Institute of Physical Chemistry, Polish Academy of Sciences, which basing on obtained patent carried out suitable devices (KRM calorimeters). At present the method for measuring heat of cement hydration has to be in accordance with these used in European Union countries. In order to avoid expensive modifications of instrumentation, the Institute of Physical Chemistry has designed a calorimetric system meeting requirements of the European Standard under retaining constructional solutions employed in the KRM calorimeter. In the paper a description of the device is given and the method of carrying out the measurement is discussed.

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Porphyrin in the solvation shell. The volumetric properties of some derivatives of tetraphenylporphyrins in benzene solutions

Zielenkiewicz W., Perlovich G. L.

Bulletin of the Polish Academy of Sciences. Chemistry

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2001

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Vol. 49, No. 4

305-312

EN

Volumetric properties of the porphyrin molecules in solution are approached in terms of the model of interactions of the solute with the solvent molecules which assumes the density of the solvation shell to be related to the structure and nature of the atoms in the solute molecule. Special attention is paid to analysis of the distribution functions of the conformational states of the molecules investigated in the solution, the topological structure of porphyrins, atropisomerism, and also the nature of atoms and functional groups occurring in the solute molecule. This approach is used to describe the volumetric properties of the benzene solutions of some derivatives of tetraphenylporphyrins.

3

Partial molar heat capacities of aqueous solution of some halo- and amino-derivatives of uracil

Zielenkiewicz A., Zielenkiewicz W.

Bulletin of the Polish Academy of Sciences. Chemistry

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1999

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Vol. 47, No. 3

266-271

EN

Apparent molar heat capacities of aqueous solutions of uracil, 5-fluorouracil, 5-chlorouracil, 6-chlorouracil, 5-bromouracil, 5-iodouracil, 5-aminouracil, 6-aminouracil, 6-amino-1,3-dimethyluracil, 5-nitrouracil were determined at 25 °C, 35 °c and 45 °c using a differential adiabatic scanning microcalorimeter DASM-4. The partial molar heat capacities 02,2 at 25 ° C, 35 ° C and 45 ° C were evaluated, discussed and correlated with surface accessible areas of compounds studied.

4

Methods of determiantion of heat effects. Mathematic models of calorimetric systems

Zielenkiewicz W.

Bulletin of the Polish Academy of Sciences. Chemistry

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1998

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Vol. 46, No. 4

411-423

EN

Classification of the calorimeter has been presented. The limitations of the applied mathematics model of calorimetric systems have been discused. The N-body method of the determination of total heat effects and thermokinetics has been given.