2026-06-01T02:49:37Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/140182026-02-03T11:12:55Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Cuesta-García, Ana María author Álvarez-Pinazo, Gema author García-Maté, Marta author Santacruz-Cruz, María Isabel author García-Aranda, Miguel Ángel author Gómez-de-la-Torre, María de los Ángeles author León-Reina, Laura author 2014 Building materials are very complex samples of worldwide importance; hence quantitative knowledge of their mineralogical composition is necessary to predict performances. Rietveld quantitative phase analysis (RQPA) allows a direct measurement of the crystalline phase contents of cements. We highlight in this paper the use of laboratory X-ray powder diffraction (LXRPD) employing high-energy radiation, molybdenum (Mo), for attaining the RQPA of cements. Firstly, we evaluate the accuracy of RQPA employing a commercial calcium sulfoaluminate clinker with gypsum. In addition to MoKα1 and MoKα1,2 radiations, Cu and synchrotron patterns are also analyzed for the sake of comparison. Secondly, the assessment of the accuracy of RQPA results obtained using different radiations (synchrotron, Mo, and Cu) and geometries (reflection and transmission) is performed by analyzing two well-known commercial samples. As expected, for LXRPD data, accuracy in the RQPA results improves as the irradiated volume increases. Finally, three very complex aged hydrated cements have been analyzed using MoKα1-LXRPD and Synchrotron-XRPD. The main overall outcome of this work is the benefit for RQPA of using strictly monochromatic MoKα1 radiation. Best laboratory results arise from MoKα1 data as the effective tested volume is much increased but peak overlapping is not swelled Powder Diffraction 30 (1), March 2015 0885-7156 http://hdl.handle.net/10630/14018 Cemento Rietveld quantitative phase analysis with molybdenum radiation