Add not less than 1-1/2 sacks of Portland cement to stabilize one cubic yard (1 cu.yd.) of sand mixture. Mix thoroughly in an approved pug-mill type mixer or by another method specifically approved by the Engineer or the designated representative of the Engineer. Batch tickets shall be stamped with the time of loading.
(Ordinance 2007-106, App. B, adopted 3/20/07)
A. 
Bedding.
1. 
Place cement-sand in a trench or excavation prepared for utility pipe to the depth shown on the drawings.
2. 
After bedding material is in place, set pipes in position to grade.
3. 
Add additional cement-sand material around pipe, filling to at least twelve inches (12") above pipe crown. Place cement-sand material at optimum moisture content, and in layers not to exceed six-inches (6") measured loose.
4. 
Compact with mechanical hand tamps to at least 92 percent (92%) of Standard Proctor Density, ASTM D-698 unless specifically designated otherwise on the plans.
B. 
Foundations.
Use cement stabilized sand for stabilizing below the foundation for pre-cast manholes, inlets or concrete structures.
C. 
Backfill.
1. 
When required, place cement-sand in utility trenches as backfill for lines under existing or future pavement.
2. 
Place cement-sand material at optimum moisture content in layers not to exceed twelve inches (12"), measured loose.
3. 
Compact with mechanical hand tamps to at least 92 percent (92%) of Standard Proctor Density, ASTM D-698 unless specifically designated otherwise on the plans.
(Ordinance 2007-106, App. B, adopted 3/20/07)
Allow access to completed portions of bedding or backfill for field density testing by the Owner using the nuclear method. Contractor shall pay for failed tests and Owner will pay for passing tests.
(Ordinance 2007-106, App. B, adopted 3/20/07)