3.16.2.3
Core Samples
Random core samples shall be taken from the in-place open graded bituminous
mixture before and after application of the slurry grout. The Contractor
shall take at least two field core samples before grout application and two
after grout application for every 1,000 square meters yards of finished
RMP. Half of the core samples taken after grout application shall be taken
from joints between successive grouting lanes. Field core samples shall be
102 or 152 mm 4 or 6 inch diameter and extend the full depth of the RMP
surface layer. The ungrouted core samples shall be tested for thickness.
The grouted core samples shall be visually inspected for acceptable grout
penetration. Acceptable grout penetration shall be through the full
thickness of the RMP layer with a minimum of 90 percent of the visible void
spaces filled with slurry grout. After testing, the Contractor shall turn
over all cores to the Contracting Officer. Core holes in ungrouted RMP
shall be filled with hot open graded bituminous material and leveled to
match the surrounding pavement surface. Core holes in grouted RMP shall be
filled within 24 hours from the time of coring with RMP material,
low-shrinkage portland cement concrete material, or other approved patching
material.
3.16.3
Thickness, Grade and Surface-Smoothness Requirements
Finished surface of RMP, when tested as specified below, shall conform to
the thickness and grade specified and to surface smoothness requirements
specified in Table VI. In areas where the thickness, grade or smoothness
exceeds the tolerance, the Contractor shall remove the surface lift to full
depth; the Contractor shall then replace the lift with open graded asphalt
to meet specification requirements, at no additional cost to the
Government. Diamond grinding may be used, after grout has cured, to remove
high spots to meet grade or smoothness requirements. Skin patching for
correcting low areas or planing or milling for correcting high areas will
not be permitted.
**************************************************************************
NOTE: The surface smoothness requirements specified
below should be increased to 9 to 12 mm for tank
trails and non-critical pavements.
**************************************************************************
TABLE VI
SURFACE-SMOOTHNESS TOLERANCES
Direction
Resin Modified Pavement
of Testing
Tolerance, mm
----------------------------------------------------------------
Longitudinal
6
Transverse
6
SECTION 02746
Page 26
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