and core were selected to be at the lower end of the range of material that is used in the 

 prototype. 

 100 



CO 



% 80 

 ■2 60 



(D 



t 40 



c 



0) 



u 



fe 20 



J 1 / I I I - 



1 10 100 1000 



Mass (g) 



Figure 4.4. Armor and underlayer stone mass distributions for initial experiment 



The amount of material in the armor layer is determined using the packing 

 density equation, given in the SPM as 













/ 









1 























f 























Underlays f ' 







^ 































, 











































/ 

































J 















1 



- Uniform 













/ 



t 















_ Armor 













/ 















n 















/ 



r 





























\a 



























A 



(4.1) 



where 



A^^ = number of armor units 



A = unit area of breakwater slope to be armored 



n = number of armor layer thicknesses 



k^ = layer coefficient 



P^ = armor layer porosity in percentage 



W50 = median armor weight 



58 



