Influence of K 2 So 4 in Cement on the Sulfate Resistance of Limestone Blended Cement

Key Points

• The aim is to clarify the effect of K2SO4 on the sulfate resistance of limestone blended cement.
• Used limestone blended cement with varying K2SO4 content.
• Conducted immersion tests in Na2SO4 solution according to ASTM C 1012.
• Evaluated expansion rates and mass change over 182 days.
• Higher K2SO4 content in limestone blended cement resulted in lower expansion and mass change rates after immersion.
• No clear proportional relationship was found between K2SO4 content and the generation of ettringite and dihydrate gypsum.