Инд. авторы:	Sokol E.V., Kokh S.N., Vapnik Y., Thiéry V., Korzhova S.A.
Заглавие:	Natural analogs of belite sulfoaluminate cement clinkers from Negev Desert, Israel
Библ. ссылка:	Sokol E.V., Kokh S.N., Vapnik Y., Thiéry V., Korzhova S.A. Natural analogs of belite sulfoaluminate cement clinkers from Negev Desert, Israel // American Mineralogist. - 2014. - Vol.99. - Iss. 7. - P.1471-1487. - ISSN 0003-004X. - EISSN 1945-3027.
Внешние системы:	DOI: 10.2138/am.2014.4704; SCOPUS: 2-s2.0-84907964882; WoS: 000338088800029;
Реферат:	eng: Ye'elimite-larnite rocks in the Hatrurim formation of the Negev Desert, Israel, are natural analogs of belite sulfoaluminate (BSA) cement clinkers. They have been produced by ultrahigh-temperature combustion metamorphism at ambient pressure of a calcareous sedimentary precursor. Their mineralogy consists of 35-50 vol% β-Ca2SiO4, 15-20 vol% ye'elimite, 7-15 vol% ferrites, and 15-20 vol% fluorapatite and/or fluorellestadite. A few grains of hatrurite (Ca3SiO5) and α'-Ca2SiO4 have been observed as well. The composition of α'- and β-Ca2SiO4 polymorphs by EPMA are near Ca1.96-1.98Na0.01-0.02 Si0.96P0.03Al0.01O4, whereas ye'elimite has an approximate composition by EPMA of Ca3.99Mg0.02Ba0.01 Na0.02K0.02Al5.73Fe3 + 0.16Si0.10S0.97P0.02O16. The Al content of brownmillerite Ca2(Fe1-xAlx)2O5 ranges from x = 0.20-0.27. Fe-analog of shulamitite (Ca3Fe2TiO8) contains up to 15.1 wt% TiO2. Ye'elimite-larnite rocks were derived from chalky sediments by burning of combustible gas with a Tmax at 1200-1350 °C. The mineral content, microstructure, and texture/fabric of the ye'elimite-larnite rocks imply that chalky and/or marly sediments with randomly distributed clay, phosphorite, and gypsum may be utilized as cheap naturally homogenized and pulverized mixtures for industrial production of BSA cement clinker, as an environment-friendly alternative to ordinary Portland cement (OPC).
Ключевые слова:	Negev; Israel; ultrahigh pressure metamorphism; pressure; polymorphism; mineralization; microstructure; gypsum; combustion; cement; Ye'elimite-larnite rocks; Sulfoaluminate clinkers; Marly raw materials; Combustion metamorphism; Ca2SiO4 polymorphs; Southern District;
Издано:	2014
Физ. характеристика:	с.1471-1487