Table 6. Results of Tukey-Kramer Honest Significant Difference test of all Roughened Substrate Joint results from Phases 1 and 2.

Overlap Joint Class byAdhesive Loading Agent	Group A	Group B	Group C	Group D	Mean AdhesiveFracture Energy(Joules/Meter2)	# Overlap Joints (n)
#1, Silt and clay-sized withcolloidal particles	A				39.89	5
GRD-Natural Yellow	A	B			30.61	5
GRD-548OCH	A	B			27.59	5
PT Primer Natural Red		B	C		26.54	5
Gum Arabic Only Control		B	C		24.60	10
Coarse Specularite		B	C		23.93	6
P3 Natural Red		B	C		21.27	5
#4, Silt and clay-sized withvery fine sand			C		17.15	15
#3, Fine sand mixture				D	9.38	14
#6, Fine sand only				D	7.99	11
#2, Medium sand mixture				D	7.05	13
#5, Medium sand only				D	6.17	11
#7, Coarse sand only				D	5.45	10

Classes not connected by the same letter are significantly different. q* = 3.39273, α = 0.05, N = 115.