Influence of ground granulated blast furnace slag on the sulphate resistance of lime-stabilized kaolinite

摘要

This paper describes the influence of ground granulated blast furnace slag (GGBS) on the the durability of lime- stabilized kaolinite in 4.2/100 Na_2SO_4 solution. Sulphate durability was assesed in the laboratory by means of linear expansion measurements, microstructure and mineral phase analysis of compacted cylinders of the lime-stabilized kaolinite with different percentages of lime replacement by GGBS. The cylinders were immersed in 4.2/100 Na_2SO_4 solution and also in deionized water for various time periods. The results also showed that high percentages of replacement of lime with slag (in particular 83/100), with just enough lime to activate the slag, were the most effective in preventing sulphate solution attack.