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7-14-04; �7:40 ;Lester Bullding ;3203955376 # 8/ 28 <br /> Article Request Page Page 6 of 26 <br /> � <br /> (a) (b)Figure 3. (a)Sander and plywood plate used to compact dry concrete mix and sand.(b) <br /> Moisture meter in place after compaction of a middle layer. <br /> (a) (b)Figure 4.Dry concrete mix screen forms(a)before and(b)after filling.Forms were <br /> manufactured from metal window screening and were 30 cm in diameter and 14 cm high. <br /> Once a screen form was filled with dry concrete mix,plywood was placed over the footing and <br /> vibrated with the eleciric sander.This both compacted the dry mix and left a flat surface for fuhue <br /> coring. Sand was then placed and compacted around the forcned footings.This sand was compacted <br /> level with the top of the footings,thus forming the base for the middle set of footings. <br /> The middle and top set of footings were formed in a manner identical to the bottom se�The top set <br /> of footings was covered with a layer of sand appmximately 7 cm in depth. <br /> http://asae.frymulti.cotn/request2.asp?JID=S&AID=14082&CII�Inv2003&v=&i=&T=1 6/4/2004 <br />