I-80; Silvercreek Junction to Wanship, Utah Joe Serre and Cody - - PowerPoint PPT Presentation

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Feb 11, 2023 471 likes •640 views

I-80; Silvercreek Junction to Wanship, Utah Joe Serre and Cody Preston Geneva Rock Products, Inc. Elevation Weather Conditions Traffic Existing Condition of Road and Sub Base Budget 7.55 Miles 2-12 ft. lanes each

SLIDE 1

Joe Serre and Cody Preston Geneva Rock Products, Inc.

I-80; Silvercreek Junction to Wanship, Utah

SLIDE 2

Elevation
Weather Conditions
Traffic
Existing Condition of Road and Sub Base
Budget

SLIDE 3

7.55 Miles
2-12 ft. lanes each direction with 4 ft. and 10

ft shoulders

Existing asphalt surface
377,500 SY of CTAB with PCCP overlay
Project start June 2014 – completion

October 2015

Eastbound complete in 2014 with Holcim

Type II/V Cement

Westbound completed in 2015 with Holcim

Envirocore Cement

SLIDE 4

Cross sections included 4 in. CTAB

and 12 in. PCCP

Contract required 9% to 11% cement

content

UCS values between 300 – 500 PSI at

7 Days

Moist cure for 72 hrs or until prime

coat applied

No construction traffic for 72 hrs

SLIDE 5

Mill set to bottom of CTAB layer Excess tailing moved to areas lacking Shaping done by 3D guided equipment

SLIDE 6

Test strips done at 7%, 8%, 9% cement content Delivered in Bulk Transferred to spreading machine Spread dry

SLIDE 7

Rotomill mixed dry cement into milled asphalt and added water Actual cement content to meet strength requirements was 7%

SLIDE 8

Sheepsfoot roller 3D Guided Grader Smoothdrum roller

SLIDE 9

Water cured until prime coat application Placed Enviroprime prime coat Ready for PCCP

SLIDE 10

Mainline 12 in. thick PCCP over 4 in.

CTAB

Ramps 10 in. thick PCCP over 4 in.

CTAB

SLIDE 11

Held up well under construction traffic Yield loss compared to aggregate base Can’t adjust elevation easily

SLIDE 12

2014 Standard C150 Type II/V
2015 Envirocore C1157 Type MS

SLIDE 13

Duplicated mix design with different

cements

Trial batch results were similar
Holcim II/V: 5980 PSI
Envirocore: 5710 PSI
Field Performance
2014: Holcim Type II/V 5109 PSI Average
2015: Holcim Envirocore 4985 PSI Average

Mix design Trial Batches Field Performance

SLIDE 14

Allow ample time for CTAB test strips
Must be able to drive on CTAB earlier

than 72 hours.

The longer you can wait to place prime

coat, the less ruts will form.

After 2 days no chance of shaping CTAB
Envirocore cement performs similar to

standard cement

SLIDE 15