Specs

Bridgestone Retail Operations, LLC
PROJECT MANUAL
Version: December 2010a
B. No slurry shall be applied to a sub grade that is frozen or contains frost. If the air
temperature falls below 35 degrees F in the shade, completed lime-treated areas shall be
protected by approved methods against any detrimental effects or freezing.
C. Uncompacted soil-lime mixtures that are wet by rain so that the average moisture content
at the time of compaction exceeds the tolerance specified shall be dried by aeration or
other approved methods until the moisture content within the specified limits is obtained.
3.03 SCARIFYING AND PRELIMINARY MIXING:
A. Prior to the application of lime slurry the sub grade shall be scarified and thoroughly
pulverized and mixed.
B. Applications: Lime slurry shall be applied only on that area where the mixing operations
can be completed the same day.
3.04 SLURRY PLACING:
A. The lime slurry shall be placed by trucks equipped with approved distributors, and an
agitator that will keep the lime and water in a consistent mixture.
B. The distribution of lime at the rate specified shall be attained by successive passes over a
measured section or area until the proper lime and moisture content has been secured.
3.05 RATE OF APPLICATION:
3.06 MIXING:
A. The rate of application of lime treatment of the natural subgrade shall be determined by
the Eades and Grim pH Test procedure, but shall not exceed 7.0% by dry weight. The
optimum moisture shall be maintained within 2%.
A. The mixing procedure shall be as hereinafter described:
1. First Mixing:
a. The material and lime shall be thoroughly mixed by approved road
mixers or other approved equipment, and the mixing continued until, in
the opinion of the Engineer, a homogeneous, friable mixture of material
and lime is obtained, free from all clods or lumps.
b. Materials containing plastic clays or other material which will not readily
mix with lime shall be mixed as thoroughly as possible at the time of
the lime application, brought to the proper moisture content and left to
cure 72 hours or as directed by the Engineer.
c. During the curing period, the material shall be kept moist as directed.
2. Final Mixing:
a. After the required curing time, the material shall be uniformly mixed by
approved methods. If the soil binder-lime mixture contains clods, they
shall be reduced in size by raking, blading, discing, harrowing,
scarifying or the use of other approved pulverization methods so that,
when all nonslaking aggregates retained on the No. 4 sieve are
removed, the remainder of the material shall meet the following
requirements when tested in the field by laboratory sieves:
LIME STABILIZED SUBGRADE 02245 – Page 3 of 4