Abstract
Flat mortar prisms are used for the assessment of SR cements in Germany. As in other countries, relative length change is the relevant test criterion. But often it was observed that also CEM I-SR cements caused high length changes. Therefore, the significance of the test results was critically questioned. With a modified test method, significantly better test results could be achieved for cements with known high and low sulphate resistance. The modifications include i.a. cylindrical instead of flat mortar specimens and a test solution containing 3.0 instead of 30 g sulphate/L, consisting of a defined mixture of calcium, magnesium and sodium sulphate. The test method provides meaningful results for cements with various main constituents, especially for cements containing limestone, slag and fly ash.
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References
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Lipus, K. (2020). New Approach for Testing SR Cements. In: Menéndez, E., Baroghel-Bouny, V. (eds) External Sulphate Attack – Field Aspects and Lab Tests. RILEM Bookseries, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-030-20331-3_9
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DOI: https://doi.org/10.1007/978-3-030-20331-3_9
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