TY - CHAP A1 - Hünger, Klaus-Jürgen A1 - Kositz, Mario A1 - Hünger, Maximilian A1 - Krey, Juliane A1 - Mühlstädt, Mike T1 - Surface coating of siliceous parts of aggregate grains by alumina containing SCM' in alkaline solutions T2 - ICAAR, 15th International Conference on Alkali Aggregate Reaction, July 03-07, 2016, Sao Paulo, Brazil, abstracts N2 - It is well known that SCMs containing alumina can prevent the damaging alkali silica reaction in concrete. This paper deals with the direct interactions between aggregate grain surfaces (quartzitic rock material Q1) and the dissolved amounts of SCMs (metakaolin, aluminum hydroxide). Investigations have confirmed that the presence of such SCMs can strongly decrease the silica release from aggregates in comparison to solubility experiments without SCM addition. The reason for this effect is the formation of a thin alumina containing layer (some nanometers thick) on the grain surfaces. The existence of this layer could be determined by XPS. Only this method provides data of the strongly increased alumina concentration in a thin surface area and also of the layer thickness in dependence on reaction parameters. Dissolution experiments of grains coated with such layer demonstrate the effectiveness of this process and can give a further contribution for understanding the preventing mechanisms of SCMs. KW - Alumina containing SCMs KW - alumina silicate layer KW - XPS method KW - inhibition KW - surface coating Y1 - 2016 SP - S. 42 PB - ICAAR ER - TY - CHAP A1 - Gröschke, Andreas A1 - Uhlmann, Wilfried A1 - Hünger, Klaus-Jürgen A1 - Wiehe, Wolfgang A1 - Beckmann, T. T1 - Spezielle Untersuchungen zur Mineralogie in ungesättigten Kippenmassiven T2 - Vortragsband des 4. GBL-Kolloquiums vom 26. - 28. November 1997 in Cottbus, Ergebnisse und Empfehlungen Y1 - 1998 SN - 3-510-95822-5 SP - 57 EP - 63 PB - Schweizerbart CY - Stuttgart ER - TY - CHAP A1 - Hünger, Klaus-Jürgen T1 - The Self-inhibition process of certain greywackes T2 - Proceedings of the 12th International Conference on Alkali-Aggregate Reaction in Concrete, October 15 - 19, 2004, Beijing International Convention Center, Beijing, China, Vol. 1 Y1 - 2004 SN - 978-7-5062-7033-5 SP - 125 EP - 134 PB - Internat. Acad. Publ. CY - Beijing ER - TY - GEN A1 - Mo, Xiangyin A1 - Jing, Yingjie A1 - Hünger, Klaus-Jürgen A1 - Kang, Cairong A1 - Shen, Jian T1 - Characteristics of alkali aggregate reaction T2 - Gui suan yan xue bao T2 - Journal of the Chinese Ceramic Society Y1 - 2008 SN - 0454-5648 VL - 36 IS - 10 SP - 1385 EP - 1389 ER - TY - GEN A1 - Yu, Chenjie A1 - Mo, Xiangyin A1 - Deng, Min A1 - Tang, Mingshu A1 - Shen, Jian A1 - Fournier, Benoit A1 - Hünger, Klaus-Jürgen T1 - Behavior characteristic of lithium ion in alkali-aggregate reaction T2 - Journal of Southeast University (Natural Science Edition) T2 - Dongnan-Daxue-xuebao Y1 - 2009 SN - 1001-0505 VL - 39 IS - 1 SP - 127 EP - 130 ER - TY - GEN A1 - Hünger, Klaus-Jürgen A1 - Hübert, Cornelia A1 - Scholz, Yvonne T1 - Drum prüfe, was sich ewig bindet … - zur Verträglichkeit der Betonausgangsstoffe T2 - BFT Betonwerk + Fertigteil-Technik Y1 - 2009 SN - 1865-6528 SN - 0373-4331 VL - 75 IS - 3 SP - 46 EP - 55 ER - TY - GEN A1 - Bachmann, Robert A1 - Hünger, Klaus-Jürgen T1 - BTU-SP-Schnelltest zur Beurteilung der Alkaliempfindlichkeit von Gesteinskörnungen : die Entwicklung eines direkten Prüfverfahrens T2 - Beton Y1 - 2009 SN - 0005-9846 VL - 59 IS - 4 SP - 138 EP - 143 ER - TY - GEN A1 - Mo, Xingyin A1 - Zhang, Yue A1 - Yu, Chenjie A1 - Deng, Min A1 - Tang, Mingshu A1 - Hünger, Klaus-Jürgen A1 - Fournier, Benoit T1 - Investigation of alkali-silica reaction inhibited by new lithium compound T2 - ACI Materials Journal Y1 - 2010 SN - 0889-325x VL - 1 IS - 107 SP - 37 EP - 41 ER - TY - GEN A1 - Hünger, Klaus-Jürgen T1 - Der BTU-SP-Test: Direktes Prüfverfahren zur Bewertung der Alkali-Empfindlichkeit von Gesteinskörnungen T2 - Straße und Autobahn Y1 - 2010 SN - 0039-2162 VL - 61 IS - 3 SP - 143 EP - 147 ER - TY - GEN A1 - Krakow, Lutz A1 - Hünger, Klaus-Jürgen A1 - Brigzinsky, Maria T1 - Projekt ALEKOM – Aschegebundenes Ton-/Lehmfeinkornsystem T2 - Ceramic forum international : cfi, Berichte der Deutschen Keramischen Gesellschaft Y1 - 2010 SN - 0173-9913 VL - 87 SP - D8 EP - D10 ER -