UT FLAP 73(2) La Sal Mountain Loop Road Pavement Memo 20231204.pdf
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This memorandum provides design recommendations for the UT FLAP 73(2) La Sal Mountain Loop Road pavement project. The project involves repaving approximately 11 miles of roadway from Station 11+62 to Station 650+91. For mainline segments from Station 11+62 to 45+00, the recommendations are to pulverize the existing pavement and widen the road, add 2 inches of aggregate base before and after pulverizing, and pave with 3.5 to 4.5 inches of asphalt in two lifts. From Station 45+00 to 650+91, recommendations are either full-depth reclamation and overlay or removal and replacement of 8 inches of aggregate base before paving. The asphalt binder is specified as PG 64-28. Recommended pay items include aggregate base, full-depth reclamation, asphalt concrete, and pavement markings.
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Subject: Updating and summarization of UT PFH46-1(2) La Sal
Mountain Loop Road, Pavement Report # 11-02, Pavements Section Dated April 2011.
From: Darin Lockhart, Materials Engineer, CFLHD Through Mike Voth, Supervisory Materials Engineer, CFLHD
To: Braden Peters, Project Manager, CFLHD
INTRODUCTION
The purpose of this memo is to update and summarize the report used to inform pavement and material design decisions for the subject project. To this end, the following documents are attached:
UT PFH46-1(2) La Sal Mountain Loop Road, Pavement Report # 11-02, Pavements Section Dated April 2011.
SUMMARY OF RELEVANT PROJECT LIMITS
The design recommendations summary is for the UT FLAP 73(2) La Sal Mountain Loop Road project beginning at Station 11+62 to Station 650+91.
The Mile Posts (MP) listed in the UT PFH46-1(2) La Sal Mountain Loop Road, Pavement Report # 11-02, Pavements Section Dated April 2011, are approximate locations. Mile Post 2.0 begins at the intersection with Kens Lake Road and proceeds south toward higher mile posts.
The boring locations and boring logs within the limits of the UT FLAP 73(2) La Sal Mountain Loop Road project are in the range of MP 2.25 to MP 12, shown in Appendix A Field Investigation and Testing Summaries of the Pavement Report #11-02.
The relevant reports of soil or aggregate tests are for Hole Numbers B8-B40, shown in Appendix B Laboratory Test Results, Page 1 of 8 and 2 of 8.
DESIGN RECOMMENDATIONS – UT FLAP 73(2) La Sal Mountain Loop Road
The recommendations for the mainline were based on the pavement design report.
Technical Memorandum
Date: December 4, 2023
Mainline Segments Station 11+62 to 45+00
3R TYPICAL SECTION - 30 FT
Pulverize with widening
Pavement Structural Section Layer Thickness
Asphalt Concrete Pavement 4.5 inches (two lifts) Aggregate Base 2 inches Full-depth Reclamation, Method 2, 8-Inch Depth 8 inches
Construct embankment, place and compact a minimum of 8-inches of aggregate base in widened areas. Before pulverizing add 2 inches of aggregate base. Pulverize the existing paved width including widening and added aggregate base. Blend aggregate base and pulverized material together before spreading. Prepare the surface and apply prime coat on top of aggregate base.
Apply tack coat between lifts. Prepare the surface and apply fog seal across entire surface following the construction of the above structural section.
Mainline Segments
3R TYPICAL SECTION - 26 FT
Pulverize with widening Pavement Structural Section Layer Thickness
Asphalt Concrete Pavement 3.5 inches (two lifts) Aggregate Base 2 inches Full-depth Reclamation, Method 2, 8-Inch Depth 8 inches
Construct embankment, place and compact a minimum of 8-inches of aggregate base in widened areas. Before pulverizing add 2 inches of aggregate base. Pulverize the existing paved width including widening and added aggregate base. Blend aggregate base and pulverized material together before spreading. Prepare the surface and apply prime coat on top of aggregate base.
Apply tack coat between lifts. Prepare the surface and apply fog seal across entire surface following the construction of the above structural section.
Mainline Segments
4R TYPICAL SECTION - 26 FT
Reconstruction Pavement Structural Section Layer Thickness
Asphalt Concrete Pavement 3.5 inches (two lifts) Aggregate Base 8 inches
Construct subgrade, place and compact a minimum of 8-inches of aggregate base. Prepare the surface and apply prime coat on top of aggregate base. Apply tack coat between lifts. Prepare the surface and apply fog seal across entire surface following the construction of the above structural section.
Pavement Roughness
Pavement roughness is type III-B, and IV as shown in Subsection 401.16 of the Special Contract Requirements (SCRs) .
Asphalt Binder Grade
Asphalt binder grade is PG 64-28. The Pressure Aging Vessel test temperature shall be 212°F (100°C).
Recommended Pay Items Item Number Item Description Unit
30101-0000 AGGREGATE BASE TON
30401-5500 FULL DEPTH RECLAMATION, METHOD 2, 8-INCH DEPTH MILE
40101-5600
ASPHALT CONCRETE PAVEMENT, GYRATORY MIX,1/2-
INCH OR 3/4-INCH NOMIMAL MAXIMUM SIZE
AGGREGATE, 0.3 TO <3 MILLION ESAL
TON
40105-3000 ANTISTRIP ADDITIVE, TYPE 3 TON
40601-0000 FOG SEAL TON
41102-1000 PRIME COAT, METHOD 1 SQYD
41105-0000 BLOTTER TON
41201-0000 TACK COAT TON
Values used for estimating quantities:
Aggregate base………………. 139 lb./cuft Asphalt concrete pavement… .. 145.2 lb./cuft Antistrip……………………… 1% by weight of mix Fog seal……………………….. 0.10 gal/sqyd (240.7 gal/ton) Tack coat……………………… 0.10 gal/sqyd (233 gal/ton)
SPECIAL CONTRACT REQUIREMENTS & CONSTRUCTION CONSIDERATIONS
The FP-14 and associated SCRs will be used for the contract.
ATTACHMENTS
Attachment #1: UT PFH46-1(2) La Sal Mountain Loop Road, Pavement Report # 11-02.
Pavements Section Dated April 2011.
Attachment #1
| 2023-12-05T15:27:31-0700 | |
| DARIN L LOCKHART |
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