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

Table 9

Computation results of flexural strength of recycled concrete hollow blocks.

Block type	Numerical reading (kN)					Average strength (MPa)	Single block minimum (MPa)
	1	2	3	4	5
RCB-10-1						2.69	1.73
(kN)	20.7	35.4	37.3	30.4	39.4
L (mm)	367	367	367	367	367
B (mm)	190	190	190	189	189
H (mm)	186	195	182	186	189
Strength (MPa)	1.73	2.70	3.26	2.56	3.21
RCB-10-2						1.87	1.67
(kN)	23.8	22.2	25.4	20.3	21.1
L (mm)	367	367	367	367	367
B (mm)	190	189	190	189	190
H (mm)	184	186	189	188	190
Strength (MPa)	2.04	1.87	2.06	1.67	1.69
RCB-10-3						1.84	1.55
(kN)	19.7	21.2	23.1	24.5	18.1
L (mm)	367	367	367	367	367
B (mm)	190	190	189	191	190
H (mm)	180	185	186	182	184
Strength (MPa)	1.76	1.79	1.94	2.13	1.55
RCB-10-4						1.38	1.1
(kN)	15.2	21.7	13.4	15.8	17.4
L (mm)	367	367	367	367	367
B (mm)	190	188	190	190	190
H (mm)	185	190	188	187	188
Strength (MPa)	1.29	1.76	1.10	1.31	1.43
RCB-7.5-1						2.16	1.6
(kN)	31.5	21.3	32.1	28.4	19.5
L (mm)	367	367	367	367	367
B (mm)	190	190	190	190	190
H (mm)	191	191	188	187	188
Strength (MPa)	2.50	1.69	2.63	2.35	1.60
RCB-7.5-2						1.42	1.33
(kN)	16.3	18.2	18.4	16.1	17.2
L (mm)	367	367	367	367	367
B (mm)	189	189	190	190	190
H (mm)	188	187	188	187	188
Strength (MPa)	1.34	1.52	1.51	1.33	1.41
RCB-7.5-3						1.25	1.09
(kN)	15	15.4	13.4	16.1	15.9
L (mm)	367	367	367	367	367
B (mm)	189	189	190	190	190
H (mm)	185	190	189	188	187
Strength (MPa)	1.28	1.24	1.09	1.32	1.32
RCB-7.5-4						1.03	0.92
(kN)	13.3	11.7	12.3	13.8	11.4
L (mm)	367	367	367	367	367
B (mm)	189	188	190	190	190
H (mm)	190	183	189	187	189
Strength (MPa)	1.07	1.02	1.00	1.14	0.92
RCB-10-5						1.21	1.14
(kN)	13.4	15.8	14.4	14.6	15.3
L (mm)	367	367	367	367	367
B (mm)	189	189	190	190	190
H (mm)	185	190	189	188	187
Strength (MPa)	1.14	1.27	1.17	1.20	1.27
RCB-7.5-5						1.06	0.91
(kN)	15.2	11.7	13.6	12	11.2
L (mm)	367	367	367	367	367
B (mm)	190	190	190	190	190
H (mm)	181	189	187	189	189
Strength (MPa)	1.34	0.95	1.13	0.97	0.91