Performance of silicic pozzolans and Portland cements in their behavior in front of gypsum attack as determined by ASTM C 452-68


  • R. Talero Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC). Madrid (España).



gypsum attack, portland cements, silica fume, diatomites


For this study, ASTM C 452-68 testing was conducted for two years on 54 POZC-silica fume (SF) or diatomites (D and N) (=Z pozzolans), were tested for 2 years, by ASTM C 452-68 method, having determined to their specimens their Vcl(=ΔL(%)/day) . The results have borne out that the pozzolanic reactions from SiO2r- of these Z pozzolans, in a sulfatic environment, had prevailed sooner (with D and N) or later (with SF) over the sulfatic hydration of their POZC, reaching completion in the first 28 days. Therefore, after positive result is obtained in the Frattini test, as well as in other equivalent tests standardized, the ASTM C 452- 68 test can be validly used to differentiate 28-day POZC-Z pozzolan or with any other from natural or artificial origin, which may or may not give rise to the development of low, moderate or high SR. The only requisite would be to establish suitable standard physical-chemical requirements and specifications..


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How to Cite

Talero, R. (2013). Performance of silicic pozzolans and Portland cements in their behavior in front of gypsum attack as determined by ASTM C 452-68. Materiales De Construcción, 63(310), 159–193.



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