A Study on the Abrasion Resistance of Hydraulic Structures with Different Repair Mortars

Table 3

Results of an ASTM C 1138 underwater abrasion test on coatings.

	Time (hours)	0	12	24	36	48	60	72
Volume of material lost (m^3)	M25 repair mortar	0	0.00007	0.00017	0.00024	0.00033	0.00041	0.00045
	Silica fume mortar	0	0.00007	0.00014	0.0002	0.00027	0.00032	0.00038
	Polymer modified mortar	0	0.00003	0.00006	0.00009	0.00011	0.00014	0.00017
Average depth of abrasion (mm)	M25 repair mortar	0	1.54	2.88	4.01	5.21	6.34	7.08
	Silica fume mortar	0	0.24	0.72	1.38	1.89	2.49	3.49
	Polymer-modified mortar	0	0.22	0.68	1.34	1.81	2.48	2.81