THE SURFACE ENERGY OF TOBERMORITE
作者： Stephen Brunauer , D. L. Kantro , C. H. Weise
DOI: 10.1139/V59-097
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摘要: The total surface energy (or enthalpy) of a calcium silicate hydrate, tobermorite, having the composition Ca3Si2O7•2H2O, was determined at 23.5 °C. tobermorite obtained from room-temperature hydration tricalcium silicate, Ca3SiO5, or β-dicalcium β-Ca2SiO4, two most important constituents portland cements. reactions were carried out in three different ways, and 14 preparations obtained. For each preparation heats solution mixture nitric acid hydrofluoric measured °C, areas by B.E.T. method, using water vapor 25 °C as adsorbate. cross-sectional area adsorbed molecule taken to be 11.4 A2. found 386 ± 20 ergs/cm2. It is close geometric mean energies hydroxide hydrous amorphous silica, previously reported.Nitrogen adsorption did not measure true surface...
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