Sulfate resistance of calcium sulphoaluminate cement

Autor: Seth Roswurm, Chris Ramseyer, Edward K. Rice, Eric P. Bescher
Rok vydání: 2016
Předmět:
Zdroj: Journal of Structural Integrity and Maintenance. 1:131-139
ISSN: 2470-5322
2470-5314
DOI: 10.1080/24705314.2016.1211235
Popis: The resistance to chemical sulfate attack was tested for cements containing various amounts of tricalcium aluminate (C3A) and compared to that of calcium sulphoaluminate-belite cement containing no detectable amount of C3A. The six materials tested included a portland Type I (11% C3A), Type II (6% C3A), a Type V (0.5% C3A), and a rapid setting calcium sulphoaluminate (CSA) cement (0% C3A). In addition, two intermediate blends (0.4 and 5.0% C3A) were tested by combining these portland cements with shrinkage compensating CSA cement. Mortar cubes were immersed for two years in a solution containing high concentrations of sodium and sodium/potassium sulfate. Degradation of the mortar cubes was assessed qualitatively via visual observation and quantitatively through measurement of weight change. The magnitude of the degradation by sulfate attack was found to correlate well with C3A content as measured by X-ray diffraction, with Type I portland sustaining the heaviest damage and the CSA rapid setting ce...
Databáze: OpenAIRE