Table 4 Compressive strength of concrete under different replacement rates.

From: Effect of biological shells aggregate on the mechanical properties and sustainability of concrete

Shell replacement ratio/%

Compressive strength fc (MPa)

0 (Standard Group)

20.4

19.5

20

20.6

20.3

18.8

10

23.4

21.3

22.4

22.2

21.6

22.8

30

22.5

22.9

22.8

20.3

22.4

22.5

50

21.8

22.6

21.9

22.3

23.3

22.9