International Journal of Concrete Structures and Materials

Table 5 Progress of self-healing in cracked concrete

From: Enhancing Structural Resilience: Microbial-Based Self-Healing in High-Strength Concrete

Specimen	Crack width (µm)	Area (µm²)
Specimen	Crack width (µm)	0 day	7 days	14 days	21 days	28 days	42 days
Control	467.6	− 376,719.6	− 370,158	− 368,673	− 363,601.6	− 362,732	− 360,154
B. flexus 1	218.8	− 114,531.4	− 26,152.7	− 13,790.2	− 8404.5	521.83	2191.54
B. flexus 2	259.69	− 126,747.6	− 84,519.2	− 55,767.4	− 32,763.8	− 20,593	− 4992
S. koreensis 1	203.4	− 111,859.6	− 78,860.3	− 63,204.6	− 39,970.7	− 19,661	− 201.82
S. koreensis 2	288.7	− 144,700.2	− 108,689	− 81,792.1	− 54,179.7	− 23,027	− 3595.1

It should be noted that the negative sign (−) indicates the area is a valley area in the cracked section of concrete

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