Study on Preparation and Properties of High-Strength Nano-Ceramic Coating on the Surface of Steel Structure Connectors

Table 6

River sand grading.

Sieve size (mm)	Cumulative sieve residue (%)	Sieve size (mm)	Cumulative sieve residue (%)
4.7975	1.9695	0.606	45.9752
2.3836	9.1203	0.303	86.0419
1.1918	29.0173	0.1515	99.5456