DPWH - Blue Book

Each pass shall terminate at least 910 mm (3 ft) in advance or to the rear of the
end of the preceding pass. During compaction, the surface shall be dragged or
bladed as necessary to fill ruts and to remove incipient corrugation or other
irregularities. Rolling shall continue until the surface is of uniform texture and
satisfactory compaction is obtained. Initial rolling shall be performed with a
pneumatic tire roller and final rolling with a 3-wheel or tandem-type steel wheel
roller. Rolling shall be discontinued whenever it begins to produce excessive
pulverizing of the aggregate or displacement of the mixture.
When the compacted thickness of the road mix lime stabilized base course
is to be more than 150 mm, the mixture shall be spread from the windrow and
compacted in two (2) approximately equal layers, the first layer to be bladed and
rolled before the second layer is spread.
Compaction shall continue until a field density of not less than 100% of the
compacted maximum dry density determined in accordance with AASHTO T 180,
Method D has been attained. Field Density test shall be in accordance with
AASHTO T 191.
203.3.7 Protection, Curing and Maintenance
After the lime-stabilized base course has been finished as specified herein,
the surface shall be protected against rapid drying for a period of at least five (5)
days by either of the following curing methods:
1. Maintain in a thorough and continuously moist condition by sprinkling
with water.
2. Cover the completed surface with a 50 mm layer of earth or sand and
maintain in moist condition.
3. Apply on the surface an asphalt membrane of the type and quantity
approved by the Engineer.
4. Apply on the surface a liquid membrane curing compound of the type
and quantity approved by the Engineer.
The Contractor shall be required to maintain at his own expense the entire
work within the limits of his Contract in good condition satisfactory to the Engineer
from the time he first started work until all work shall have been completed.
Maintenance shall include immediate repairs of any defects that may occur before
and after the lime-stabilized base course has been compacted and finished, which
work shall be done by the Contractor at his own expense and repeated as may be
necessary to keep the base continuously intact.
203.3.8 Trial Sections
Trial sections of the stabilized base shall be constructed at least 2 weeks
before actual base construction. These shall conform to the applicable
requirements of Subsections 200.3.4, Trial Sections.
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