Modification and Evaluation of the Asphalt Pin Tie-Down for F-shape PCB: Test No. WITD-4

Report Number(s): TRP-03-488-24

Description: The test installation consisted of sixteen 12-ft 6-in. long F-shape PCBs with a steel pin tiedown anchorage system for use with asphalt surfaces, as shown in Figures 45 through 59. The system was installed with the rear toe of the PCBs placed 18 in. away from the edge of both a 2-in. thick asphalt pad and a 36-in. wide x 36-in. deep trench. Photographs of the test installation are shown in Figures 60 and 61. Material specifications, mill certifications, and certificates of conformity for the system materials are shown in Appendix D. The concrete mix for the barrier sections required a minimum compressive strength of 5,000 psi. A minimum concrete cover of 2 in. was specified for all reinforcement. Each PCB was reinforced with ASTM A615 Grade 60 rebar. Barrier segments were connected with a pin-and loop system, as shown in Figure 49. Each connection pin had a length of 28 in., diameter of 1¼ in., and was used to interlock the ¾-in. diameter ASTM A709 Grade 70 connection loops. The barrier installation was placed on top of a 2-in. thick asphalt pad composed of NE SPR Mix with 64-34 Grade binder. Barrier nos. 5 through 13 were each anchored to the ground surface through the anchor pockets on the traffic side with three 1½-in. diameter by 38½-in. long, ASTM A36 steel anchor pins driven through the 2-in. thick asphalt pad and into the underlying soil, as shown in Figures 45, 46, 48, and 49. During installation, the barrier segments were pulled in a direction parallel to their longitudinal axes, and slack was removed from all joints. After slack was removed from all joints, steel anchor pins were embedded to a depth of 32 in., as shown in Figures 46 and 49. A saddle cap assembly was attached at the joints between barrier nos. 5 through 13. The assembly consisted of a 16-in. tall x 12-in. wide x ¼-in. thick saddle cap, a 31¼-in. long, 1¼-in. diameter connection pin, and a 3-in. tall x 3-in. wide x ¼-in. thick stiffening tube, as shown in Figures 55 and 56. Title: Modification and Evaluation of the Asphalt Pin Tie-Down for F-shape PCB: Test No. WITD-4

Test Level: 3

Barrier Type: F-Shape

MASH Test Number: 3-11

Proprietary/Non-proprietary: Non-proprietary

Pass/Fail: Pass

Evaluation: Testing + Engineering Analysis

Sponsor: Midwest Pooled Fund

Test Article Description

Section Length: 12' 6"

Connection Type: Steel Rods

Ground Connection: Pinned

Report(s):

TRP-03-488-24 Report