Table 4. Results of Tukey-Kramer Honest Significant Difference test of all Phase 2 results^♣.

Overlap Joint Class by Adhesive LoadingAgent and Substrate Condition	Group A	Group B	Group C	Group D	Group E	Mean AdhesiveFracture Energy(Joules/Meter2)	# OverlapJoints (n)
#1, Silt and clay-sized with colloidal particles– Rough Substrate	A					39.89	5
Gum Arabic Only – Rough Substrate		B				22.84	5
#4, Silt and clay-sized with very fine sand –Rough Substrate		B	C			17.15	15
Gum Arabic Only – Smooth Substrate			C	D	E	10.99	5
#3, Fine sand mixture – Rough Substrate				D		9.38	14
#4, Silt and clay-sized with very fine sand –Smooth Substrate				D	E	8.93	14
#6, Fine sand only – Rough Substrate				D	E	7.99	11
#1, Silt and clay-sized with colloidal particles– Smooth Substrate				D	E	7.79	16
#2, Medium sand mixture – Rough Substrate				D	E	7.05	13
#3, Fine sand mixture – Smooth Substrate				D	E	6.82	15
#7, Coarse sand only – Smooth Substrate				D	E	6.38	20
#5, Medium sand only – Smooth Substrate				D	E	6.19	20
#5, Medium sand only – Rough Substrate				D	E	6.17	11
#6, Fine sand only – Smooth Substrate				D	E	6.06	19
#7, Coarse sand only – Rough Substrate				D	E	5.45	10
#2, Medium sand mixture – Smooth Substrate					E	4.33	15

^♣Classes not connected by the same letter are significantly different. q* = 3.472, α = 0.05, N = 208.