Tag Archives: North Carolina Department of Transportation

RCC (Special Application) – Silver Award

Silver Award –DOT 4 ft. Shoulder and Ramp Replacement, Guilford/Randolph County, N.C.

Contractor: Andale Construction*

Owner:  North Carolina Department of Transportation     

Engineer: NCDOT District 7 RCE

When the North Carolina District 7 Department of Transportation wanted to rehabilitate a 7-mile section of Interstate 85—north and south bound—located between Archdale and High Point, officials selected roller compacted concrete for the 10 ft. outside shoulder. 

Because RCC adds a significantly higher structural value to the shoulders, NC DOT also decided to see if the contractor could pave a 4 ft.-wide inside shoulder as well so that the entire roadway would be concrete.  A typical RCC section of 4 ft. RCC had never been successfully constructed before the North Carolina project.

Andale Construction modified its high density screed paver and with detailed upfront planning handled the project. The construction time for both of the north and south bound lanes was 16 days from start to finish. The typical section of the 35,887 SY inside shoulder was 6 in. in depth with wider areas placed to meet bridge approaches and slope protections.

In addition to the inside shoulders, Andale also replaced the two concrete exit and entrance ramps at the Archdale #111 exit with broom-finished RCC. The ramps were removed, reconstructed with RCC and reopened in 1O total working days, including demolition of the existing 8 to 11 in. concrete section.

The speed with which the RCC was placed saved NC DOT three months of construction time on the inside shoulder and four months on the ramp replacement. The inside shoulders took 16 total days to remove and replace and the ramps took 10 total days – including curing time.

 

Concrete Pavement Restoration (GOLD)

I-40 CPR Express Design-Build Project, Winston-Salem, NC
Contractor: The Lane Construction Corporation
Owner: North Carolina Department of Transportation
Engineer: Progressive Design Group, Inc.

The goal of this project was to improve the cloverleaf interchange of I-40 and US52 to handle expected traffic volume increases from a two-year shutdown of Business 40. The project involved removing and replacing existing damaged jointed concrete slabs and placing new, jointed concrete pavement.

Facing a requirement to remove and replace significant amount of concrete pavement a single construction season, would have been challenging enough, but The Lane Construction Company also faced many other factors, including:

  • Managing restrictions that limited lane narrowing or lane closures between 5 a.m. to 7 p.m. (Monday thru Friday).
  • Completing undercuts that were required ahead of placing new concrete pavement, all within the same shift during the week or within the same weekend closure.
  • Encountering continuously reinforced concrete or extra depth concrete that required modification of concrete removal methods.
  • Contending with reduced work areas and night work.
  • Managing high-volume, high-speed traffic on both I-40 and US52.
  • Managing the project around event-related restrictions, which included all holidays, Wake Forest football home games, the 10-day long Dixie Classic Fair restrictions (which extended from 6 a.m. to 9 p.m.), Bowman Gray Stadium Racing events, and Winston-Salem State football games.
  • Coordinating with surrounding projects and manage resources using a non-conventional work schedule.

Because of lane closure restrictions, the contractor used a very high early-strength concrete mixture to achieve the 400 psi flexural strength requirement prior to opening to traffic. Lane Construction used a combination of volumetric rapid set concrete during nightly closures and an accelerated, 12 hour/24 hour ready-mixed concrete when extended closures were permitted.

Equally important was a thorough work plan Lane Construction developed to meet the many challenges, while also maintaining productivity and quality. One factor that could have impacted quality was the risk of damage to recently placed concrete while removing concrete from adjacent areas. To protect the new concrete, expansion material was placed between the new and existing concrete pavement intended to be removed. Despite significant challenges, this exceptional project was delivered on time.

Events Calendar

« May 2020 » loading...
M T W T F S S
27
28
29
30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

Member Login

Do NOT follow this link or you will be banned from the site!