Laserfiche WebLink
TABLE 1 <br /> Materials Quality Control Program <br /> Soil/Bentonite Slurry Trench Cut-Off Wall <br /> SUBJECT STANDARD TYPE OF TEST MINIMUM FREQUENCY SPECIFIED VALUES <br /> Water ---- -pH Per water source or as As required to properly <br /> -Total Hardness changes occur hydrate bentonite with <br /> approved additives <br /> Additives ---- Manufacturers certificate of One time As approved by Engineer <br /> compliance with stated <br /> characteristics <br /> Bentonite API Std 13A Manufacturers certificate of One time Premium grade sodium <br /> Material compliance cation montmerillonite <br /> Backfill Soils ---- Selected soils obtained from Per borrow source or as -65 to 100%passing 3/8" <br /> a borrow area approved by changes occur sieve <br /> the Engineer -40 to 85%passing#20 <br /> sieve <br /> -25 to 40%passing#200 <br /> sieve <br /> Roll to 1/8"thread <br /> Prepared for API Std 13B -Unit Weight Unit weight 2:1.03 gm/cc <br /> Placement into the -Viscosity V z 40 sec-March @ 68' <br /> trench 1 set per shift or per batch <br /> -Filtrate Loss (pond) Loss s 30 cc in 30 min. <br /> Slurry @ 100 psi <br /> -pH pH z 8 <br /> In Trench API Std 13B 1 -Unit Weight 1 set per shift at point of Unit weight= 1.03 - 1.40 <br /> -Sand Content trenching gm/cc-Sand content= 0 <br /> to 20%by volume <br /> At Trench ASTM C 143 -Slump 1 set per 100 cu/yds. -Slump 2 to 6 inches <br /> -Gradation 1 set per 300 cu/yds. -65 to 100%passing 3/8" <br /> sieve <br /> Backfill Mix -40 to 85%passing#20 <br /> sieve <br /> -25 to 40%passing#200 <br /> sieve <br />