Ceramics-Silikáty 47, (4) 141 - 148 (2003) |
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CHEMICAL RESISTANCE OF PORTLAND CEMENT, BLAST- FURNACE SLAG PORTLAND CEMENT AND SULPHOALUMINATE-BELITE CEMENT IN ACID, CHLORIDE AND SULPHATE SOLUTION: SOME PRELIMINARY RESULTS
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Dan Elena 1, Janotka Ivan 2
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1 TRANSILVANIA University, Faculty of Construction, Brasov, Colina Universitatii,
Corp Z, Brasov, Romania
2 Institute of Construction and Architecture, Slovak Academy of Sciences,
Dubravska cesta 9, 845 03 Bratislava 45, Slovak Republic
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Keywords: Portland cement, Sulphoaluminate belite cement, Chemical resistance, Chloride and sulphate solution
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Durability of concrete significantly depends on the cement matrix resistance against the aggressive environmental conditions.
Information on chemical resistance of the cement in various aggressive media is very useful for the durability assessment of
cement based materials. The aim of this contribution is the chemical resistance study of a sulphoaluminate belite (SAB)
cement based on fly ash as industrial by-product raw material, exposed to the acid, chloride and sulphate solution for 180
days. For comparison, test specimens made from ordinary Portland cement (OPC), and blast-furnace slag Portland cement
(BFSPC) with higher chemical resistance were used. All cement types and materials are of Romanian provenance. The test
results show that the fly ash - based SAB cement is similarly resistant against acid, chloride and sulphate attack when compared
to OPC and BFSPC. A half-year testing period enables preliminary evaluation of the cements' resistance due to relative
short exposure times. |
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