@misc{BachmannHuenger, author = {Bachmann, Robert and H{\"u}nger, Klaus-J{\"u}rgen}, title = {BTU-SP-Schnelltest zur Beurteilung der Alkaliempfindlichkeit von Gesteinsk{\"o}rnungen : die Entwicklung eines direkten Pr{\"u}fverfahrens}, series = {Beton}, volume = {59}, journal = {Beton}, number = {4}, issn = {0005-9846}, pages = {138 -- 143}, language = {de} } @misc{BachmannHuengerScholz, author = {Bachmann, Robert and H{\"u}nger, Klaus-J{\"u}rgen and Scholz, Yvonne}, title = {Entwicklung eines direkten Pr{\"u}fverfahrens zur Alkaliempfindlichkeitsbeurteilung von Gesteinsk{\"o}rnungen : der BTU-SP-Schnelltest}, series = {Forum der Forschung}, journal = {Forum der Forschung}, number = {20}, issn = {0947-6989}, pages = {73 -- 78}, language = {de} } @inproceedings{HuengerBachmannScholzetal., author = {H{\"u}nger, Klaus-J{\"u}rgen and Bachmann, Robert and Scholz, Yvonne and H{\"u}bert, Cornelia and Mo, X.}, title = {An accelerated chemical test method for ASR carried out directly at aggregate grains}, series = {Conference proceedings, 13th International Conference on Alkali-Aggregate Reaction in Concrete, Trondheim, Norway, 16 - 20 June 2008}, booktitle = {Conference proceedings, 13th International Conference on Alkali-Aggregate Reaction in Concrete, Trondheim, Norway, 16 - 20 June 2008}, editor = {Broekmans, Maarten A. T. M. and Wigum, B{\o}rge J.}, address = {Trondheim}, isbn = {978-82-7385-128-4}, pages = {782 -- 793}, language = {en} } @inproceedings{BachmannHuenger, author = {Bachmann, Robert and H{\"u}nger, Klaus-J{\"u}rgen}, title = {Interactions of chemical and physical parameters of aggregate grains for a better understanding of alkalisilca-reaction}, series = {ICAAR, 14th International Conference on Alkali Aggregate Reaction, May 20-25, 2012, Austin, TX}, booktitle = {ICAAR, 14th International Conference on Alkali Aggregate Reaction, May 20-25, 2012, Austin, TX}, pages = {10}, abstract = {Mortar bar and concrete prism tests are the most commonly used methods for the evaluation of alkali-silica reactivity (ASR). Despite their widespread use, both methods have significant drawbacks. The largest issue is that neither test is a direct measurement of the aggregate. Matrix effects from the mortar or concrete, or variations in the individual non-aggregate materials can influence the outcome. This paper describes fundamental results as the basis for the chemical and physical test method (BTU-SP test) directly carried out at aggregate grains. Additional methods (BET, microscopy) confirm that not only the aluminate from the aggregate controls the silica release but also the pore structure inside of rocks (i.e. voids, cracks) buffer the swelling potential of the formed alkali-silica gel. As a result a reaction model describing the interactions of chemical and physical parameters in 4 phases has been developed for an alkalisilica reaction.}, language = {en} }