Thermal Performance Assessment of Concrete Walls Using Different Phase Change Materials

Table 4

Rebound hammer data at 16 points on the face of the wall chamber.

S. no.	Direction of hammer	Rebound point	Rebound number	Average rebound number	Compressive strength (MPa)	Compressive strength (psi)
1	A	A1	28	29	21	3,045
2		A2	28
3		A3	29
4		A4	28
5		B1	26
6		B2	28
7		B3	29
8		B4	28
9		C1	30
10		C2	31
11		C3	31
12		C4	30
13		D1	31
14		D2	32
15		D3	28
16		D4	34

According to ASTM C 805-18: rebound number = 29 rebound number (average).