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Aspects of the sulfate resistance of steelwork slag cements

โœ Scribed by Antje Duda

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
723 KB
Volume
17
Category
Article
ISSN
0008-8846

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โœฆ Synopsis

Cement mixes were prepared by intergrinding portland cement clinker (PC), granulated blast furnace slag (BF)and two LD slags (LDI, LDII) in varying proportions. On water-cured cement mortar and paste specimens the compressive strength, pore size distribution and Ca(OH)9 content were determined. Corresponding specimens were exposed to suTfate attack (CaSO 4, MgSOm, Na~S04) and the expansion and the variation of compressive ~trength wer~ m6nitored. The results show al! BF-LD-PC and BF-LD cements to be "sulfate" resistant which correlates well with their decreased capillary pore volume and low Ca(OH)gcontents. Xray analysis of SOd-bearing phases indicate no clear corre?ation between ettringite contents and observed degree of sulfate corrosion. Besides, the chemical/mineralogical composition of the LD slags exerts a distinct influence on their hydraulic properties.

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