Outcomes of the RILEM round robin on degree of reaction of slag and fly ash in composite cements

Author(s): Paweá T. DurdziĔski, Mohsen Ben Haha, Susan A. Bernal, Nele De Belie, Elke Gruyaert, Barbara Lothenbach, John L. Provis, Axel Schöler, Christopher Stabler, Zhijun Tan, Anya Vollpracht, Frank Winnefeld, Yury Villagrán Zaccardi, Maciej Zając, Karen L. Scrivener
Paper category: Proceedings
Book title: Proceedings of the International RILEM Conference
Materials, Systems and Structures in Civil Engineering 2016
Segment on Concrete with Supplementary Cementitious Materials
Editor(s): Ole M. Jensen, Konstantin Kovler and Nele De Belie
ISBN:978-2-35158-178-0
e-ISBN: 978-2-35158-179-7
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 306 - 311
Total Pages: 6
Language : English

Abstract: Working group 2 of the RILEM TC 238-SCM organized a round robin test to compare the protocols of different laboratories to determine the degree of reaction of two slags,a calcareous and a siliceous fly ash in binary mixes with Portland cement. The techniques used were: selective dissolution, analysis of the differences in portlandite content from thermogravimetric analysis, X-ray diffraction with PONKCS (partial or no known crystal structure) refinement, and scanning electron microscopy with image analysis. As each laboratory followed their own protocols, the collective assessment of the results provided an idea of the maximum inter-laboratory variability, which should be universally valid. This study assesses the accuracy and precision of the four techniques investigated and with respect to each of the materials studied.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00