【摘 要】
：
Due to their world wide availability and their suitability for the production of well performing cements calcined clays are supplementary cementitious materials of high interest.In order to achieve an
【机 构】
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VDZ gGmbH, Research Institue of the Cement Industry, 40476 Duesseldorf Germany
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Due to their world wide availability and their suitability for the production of well performing cements calcined clays are supplementary cementitious materials of high interest.In order to achieve an optimal cement performance the adjustment of the cement constituents clinker, calcined clay and sulphate cartier plays an important role and was in the focus of the research project presented.Cements consisting of different types of Portland cement clinker and calcined clays were produced by mixing in laboratory scale.The used clinkers differed regarding their alkali contents as well as their phase composition.The used kaolinitic, illitic and chloritic clays show low ceramic qualities and represent typical clays of cement plant quarries.They were calcined with different burning conditions varying burning temperature to achieve the highest pozzolanic activity, which was determined by different methods.The produced cements contained 20 and 40 mass % of the calcined clays, respectively, and were examined according to EN 196 and concerning their pore structure.Furthermore an optimization of the sulphate agents were carried out by characterizing the compressive strength development according to EN 196-1 and the hydration products by means of Differential Scanning Calorimetry (DSC) and X-Ray Diffraction analyses (XRD).
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