Test number	Design strength level	Workability description	Slump (mm)	Compressive strength (MPa)
Test number	Design strength level	Workability description	Slump (mm)	3 days	7 days	28 days
20	C25	Good workability, good cohesiveness	185	10.4	14.9	24.3
21	C20	Good workability, good cohesiveness	190	7.7	11.5	19.6
22	C20	Poor workability	140	6.8	10.7	18.5
23	C25	Good workability	170	9.0	13.8	23.3
24	C25	Poor workability	145	8.9	14.2	23.3
25	C30	Good workability	175	11.6	18.3	28.6
26	C30	Poor workability	145	11.7	17.2	28.6