Effect of Nanosilica Particle Size on the Water Permeability, Abrasion Resistance, Drying Shrinkage, and Repair Work Properties of Cement Mortar Containing Nano-SiO₂

Table 4

Number of cracks in cement mortar with OPC, cement mortar with various particle sizes of NS, and cement mortar with SF at all ages.

Samples	Number of cracks			Total cracks
	1 day	28 days	90 days
OPC	0	0	1	1
NS 12 nm	19	11	6	36
NS 20 nm	0	19	8	27
NS 40 nm	0	0	2	2
SF 100 nm	2	1	2	5