Analysis of the Effect of Substitution Rate on the Mechanical Properties of Recycled Concrete Hollow Block

Table 11

Summary of the test results of flexural strength of recycled blocks with different substitution rates of MU7.5.

Block	RCB-7.5-1	RCB-7.5-2	RCB-7.5-3	RCB-7.5-4	RCB-7.5-5
Average flexural strength (MPa)	2.16	1.42	1.25	1.03	1.06
Standard deviation (MPa)	0.4409	0.1236	0.0954	0.0819	0.1775
Coefficient of variation	0.2041	0.0870	0.0763	0.0795	0.1675
Minimum flexural strength of single block (MPa)	1.6	1.33	1.09	0.92	0.91