A systematic analysis of binary blend cement concrete infused with lime sludge and fly ash

Lime sludge is a residual substance came from the paper sector. The current research investigates that the effects of adding lime sludge to concrete as a cementitious substance on its mechanical properties. Lime sludge replaces cement in various amounts to provide the appropriate mechanical properties. The resulting material is then compared to standard concrete. The research on supplemental cementation resources that equivalent Portland cements's potency without compromising stability. According to the Indian standard (IS 10262–2009), the study used M20, M30, and M40 concrete. Lime sludge replaced cement 0 ​%, 10 ​%, 20 ​%, and 30 ​%. Also investigated were lime sludge and fly ash mixtures of 10 ​%, 20 ​%, and 30 ​% by weight. Mechanical parameters of concrete classes M20, M30, and M40 were measured at 7 and 28 days. The grades show that the 10 ​% lime sludge out performed normal concrete. This work represents can be applied as unique additional cementitious substance up to the definite proportions. • Cement production releases 1 ton of CO 2 , which accounts for 5–7% of worldwide manmade CO 2 . • Fly ash is used partial cement substitute in concrete for structural applications due to its pozzolanic properties. • Fly ash typically replaces 30 ​% of Portland cement by mass and reduces the CO 2 emissions. • This study incorporates lime sludge, a byproduct of the paper industry.