Properties of self-consolidating concrete containing limestone filler

Fillers such as limestone filler (LF) can be used to replace the cement and thus reduce the cement content in concrete. However, in applications where early age strength is critical such as precast and prestressed applications increased amount of fillers could cause a challenge due to dilution effect. This paper investigates the influence of LF on early age hydration and strength of steam cured SCC made with CSA general use cement (type GU) and high early strength cement (type HE). The reactivity of LF was also evaluated using thermal analysis. Durability tests including rapid chloride permeability test (RCPT), freeze thaw and salt scaling were conducted on SCC mixtures made with and without LF. The results showed improved early age hydration and strength in SCC mixtures containing LF compared to SCC mixtures without LF. The chloride permeability was lower in SCC mixtures containing LF compared to SCC mixtures without LF. The durability performance of SCC mixes made with and without LF was similar under freeze thaw and salt scaling cycles.