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

Table 8

Summary of the test results of compressive 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 compressive strength (MPa)	7.59	6.75	5.39	5.13	4.69
Standard deviation (MPa)	1.1580	0.7781	0.3528	1.3265	1.4592
Coefficient of variation	0.1526	0.1153	0.0655	0.2586	0.3111
Minimum compressive strength of single block (MPa)	6.32	6.19	4.80	3.70	2.78