Pavement Construction/Cross Section

 

Pavement construction and pavement cross sections are shown in the documents below.

 

Test Strip CC5 Construction Layout

Test Items CC5 Construction Layout

 

The CC-5 Test Strip effort involved the replacement of LFC-1 and LFC-2 of the CC-3 Test Items with similarly designated test areas. Removals penetrated the County Sand and Stone Clay low strength subgrade of the CC-3 Test Item Construction.

An additional 36 inches of County Sand and Stone Clay was placed above the surface at the excavated depth on the south side. It was placed in five lifts with four lifts at a thickness of 8 inches and a single lift of 12 inch thickness at the bottom. It was conditioned to an average CBR of 3.0 at an average moisture content of 25.4%. DuPont Clay was placed above the County Sand and Stone Clay to a depth of 36 inches on the north side. It was placed in six lifts of 6 to 8 inch thickness and conditioned to an average CBR of 3.5 at an average moisture content of 36.0 (See Test Area Diagram).

P-154 granular subbase material consisting of crushed quarry screenings was placed above. It was placed in four lifts of 5 to 8 inch thickness with the greater thickness lifts below. Subgrade surface levels had been adjusted (stepped) so that LFC-1 of the Test Strip received 16 inches of the P-154 subbase, and LFC-2 received 24 inches. The LFC-1 subbase was placed in three lifts and LFC-2 subbase was placed in four lifts. A compaction level of 97% was achieved at an average moisture content of 4.2% in the subbase of LFC-1, and a compaction level of 96% was achieved at an average moisture content of 4.6% in the subbase of LFC-2.

An 8 inch depth of Dense Graded Aggregate (DGA) base was placed on the P-154 subbase. The base was placed and compacted in two 4 inch lifts. A compaction level of 102% was achieved at an average moisture content of 2.3%. The Test Strip pavement was completed with the placement and compaction of a 2.5 inch thick New Jersey Department of Transportation (NJDOT) Hot Mix Asphalt (HMA) Superpave surface. Five paving lanes were used. Construction was completed on February 13, 2007.

LFC-1 and LFC-2 were further designated as North and South (N and S) to cover the variablity of subgrade type.

The Test Strip covered a total length of 170 ft. and a width of 64 ft.

Test Strip Area/Transition

Stations

Transition 0

-20 to 0

LFC-1 N LFC-1 S

0 to 30

Transition 1

30 to 50

LFC-2 N LFC-2 S

50 to 100

Transition 2

100 to 150