Laserfiche WebLink
<br />SUBJECT <br />_7 Water <br />Additives <br />bentonite <br />Material <br />Dackfill Soils <br />Prepared for <br />Placement into the <br />Irench <br />Slurry <br />In Trench <br />At Trench <br />Backrrll Mix <br /> <br />TABLE 1 <br />Materials Quality Control Program <br />Soil/Bentonite Slurry Trench Cut-Off Wall <br />y <br />STANDARD TYPE OF TEST <br />MINIMUM FREQUENCY <br />---- -pH Per water source or as <br />-Total Hardness changes occur <br /> Manufacturers certificate of One time <br /> compliance with stated <br /> characteristics <br />AN Std 13A Manufacturers certificate of One time <br /> compliance <br />---- Selected soils obtained from Per borrow source or as <br />a borrow area approved by changes occur <br />the Engineer <br />API Std 138 Unit Weight <br />Viscosity <br />Filtrate Loss <br />-pH <br />API Std 130 1 -Unit Weight <br />-Sand Content <br />ASTM C 143 Slump <br />-Gradation <br />1 set per shift or per batch <br />(pond) <br />1 set per shift at point of <br />trenching <br />1 set per 100 cu/yds. <br />1 set per 300 cu/yds. <br /> <br /> <br /> <br /> <br />SPECIFIED VALUES <br />As required to properly <br />hydrate bentonite with <br />approved additives <br />As approved by Engineer <br />Premium grade sodium <br />cation montnw illonite <br />65 l0 100% passing; 3/11" <br />sieve <br />-40 to 85% passing #20 <br />sieve <br />-25 to 40% passing #200 <br />sieve <br />Roll to 1/8" thread <br />Unit weight 21.03 gm/cc <br />V 2 40 sec-March @ G8° <br />Loss s 30 cc in 30 min. <br />9 100 psi <br />phis a <br />Unit weight 1.40 <br />gm/cc - Sancl content = 0 <br />to 20% by volume <br />-Slump 2 to G inches <br />-65 to 100% passing 3/8" <br />sieve <br />-40 it) 8S% passing #20 <br />sieve <br />-25 to 40% passing #x`200 <br />sieve