Mix ID	Specimens type	Compressive strength Age		28 days compressive strength deviation from the control pure concrete
Mix ID	Specimens type	7 days MPa	28 days MPa
P.C	Cube	18.7	19.8	-
P.C	Cylinder	17.8	18.1	-
C + 10%K	Cube	21	25.5	increased by 28.8%
C + 10%K	Cylinder	16.4	18.3	increased by 1.1%
10%K + 1%Sp	Cube	18.7	18.8	decreased by 5%
10%K + 1%Sp	Cylinder	15	18.7	increased by 3.3%
10%K + 1.5%Sp	Cube	17.6	18.1	decreased by 8.5%
10%K + 1.5%Sp	Cylinder	14.1	15.3	decreased by 15.5%
10%K + 2%Sp	Cube	16.6	16.9	decreased by14.6%
10%K + 2%Sp	Cylinder	15.8	18.7	increased by 3.3%