2 d luhr-rcc applications

8/10/2019 2 d Luhr-RCC Applications

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RCC Applications

for Pavements

David R. Luhr, PhD, PE

Program Manager

Portland Cement Association


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.33.44Fine Aggregate Ratio

.48.35w/cm ratio

31 %22 %Paste Volume100 %100 %Total

6 %3 %Air

46 %44 %Coarse Aggregate

23 %34 %Fine Aggregate

15 %10 %Water

10 %9 %Cementitious

Conventional

Concrete

RCC

VolumeAbsolute


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RCC Pavement RequirementsBased on:

Smoothness (IRI)

Concrete Density (for durabil ity, frost, permeabil ity) Concrete Strength (for fatigue)

Uniformity of Product (Density, Strength)

Surface Texture (for smoothness, appearance,friction)

Class 1 High Specification

Class 2 Moderate SpecificationClass 3 Low Specification


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Placing Equipment High density ABG

pavers

Vibrating screed

Dual tamping bars

High initial density,

90-95%

Reduces subsequentcompaction

High-volume

placement (1,000 to

2,000 cubic yards per

shift)

Designed for harsh

mixes

Smoothest RCC

surface


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Access Provided Directly Behind the ABG

Paver (Prior to Roller Compaction)


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Placing Equipment Conventional Asphalt

Pavers

Provides some initialdensity (80-85%)

Relatively smooth

surface

May require

modification

Increased cleaning

and maintenance


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Conventional Paver


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Quebec Truck Terminal


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Alternate Placing Equipment Aggregate spreaders

Jersey spreader

Motor grader/dozer

No initial compaction

Lower quality


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Off-Highway Applications

Log sort yards and haul roads Military applications

Tank hardstands

Maintenance yards

Intermodal shipping

Truck terminals/distribution centers

Industrial operations

Parking and storage


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Caycuse Log Sort Yard

Wagner L90 Log Carrier, 200k Axle Loads


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Louisiana Pacific

Tacoma, WA


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Fort Benning, GA1986

Tank Trail and Hardstand


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Maintenance Yard


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Central Freight, Austin

New Pavement, 1987

After 10 Years of Use


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Covenant Transport

Chattanooga, TN

Existing Conventional

Concrete

New RCC


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Hornsby Bend, Austin

Municipal Composting

Dillo Dirt for Sale

New RCC Old RCC


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Knoxville, TN Compost Facility

Next Day Traffic


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AutomobileRecycling

Facility


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Storage

Bins


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Wal-Mart Distribution Facility


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GM Saturn Plant

Spring Hill, TN


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HONDA AMERICA - ALABAMA

ALL INTERIOR ROADS--RCC

30 FT WIDE-7 DEPTH


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Warehouse Facilities

Lynnterm Terminal

Port of Vancouver, BC

Interior Floor

WSI, Appleton, WI


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Container Facilities

RTG Crane

Straddle Carrier

Toplifter


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Bearing-Capacity Failure


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Rutting in Asphalt with

Channelized Loadings


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RCC at Conley Terminal Boston (built 1986)


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Pier 300 - Port of Los Angeles1998

90 Acres of RCC


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CN Intermodal Yard, Calgary1998

Unsurfaced aggregateis difficult to maneuver

and presents safety

hazard

RCC decreasedtruck wait time from

8 to 2 hours


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BN Intermodal Yard, Denver1986

Straddle Carrier

35 Acres,

Up to 20 in. Thick


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Norfolk International Terminal


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New Container TerminalProjects for 2007

Port of Houston (50 acres)

Norfolk-Southern Railroad

Intermodal Terminal (Columbus,

OH) (90,000 cu. yds)


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Streets and Highways

Industrial access roads Residential streets

Highway inlays

Fast-track, high-volume intersections

Shoulders and turn lanes


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Industrial Access Roads

Merridian St., Edmonton, Alb.

Tennessee DOT


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Fort McMurray, Alberta

Rutted Asphalt

Milled Out

RCC Placed as Inlay


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Mill & Inlay - Mississippi

Before

During Inlay


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Calgary Intersection

High-Volume Asphalt Intersection Milled and

Replaced by RCC in 60-hour Weekend Construction


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Residential Street


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Residential Street

Alliance, NE

Subdivision Streets:


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Subdivision Streets:

All-Weather Access


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Arterial Roads

Flexural Strength of 400 psi

in 24 48 hrs

Can surface within hours


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Atlanta Shoulders


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RCC Performs

RCC performance unknown in 70s/80s Gained confidence in 90s that RCC will

perform for 20+ years

PCA R&D project commissioned

Roller Compacted Concrete Pavements - A

Study of Long Term Performance

Confirmed anecdotal evidence of

performance


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Surface Texture & Condition

Thin layer of surfacefines normally worn

away in first 2-3

years

Stabilizes thereafter

Coarse aggregate

exposed, butembedded BN Yard, Denver - 13 years


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Freeze/Thaw - Deicer Scaling Pavements exposed

to F/T and deicersalts have fared

exceptionally well

Numerous examplescited in report

Likely Rd., BC, built

1987. Heavy truck braking

Chip seal worn off

No deterioration


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Natural Cracks

Most economical

30 to 80 ft spacing

Often first cracksappear within 24

hours

Narrow crack widths

Seal if > 1/8 in.

Best load transfer

Minimal ravellingNew, Unsealed

Crack

10-yr Old

Sealed Crack

Saw Cut Joints


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Saw-Cut Joints

More aesthetically

pleasing

Soff-cut very

effective, shortly

following placement Need to saw within

12 hours to avoid

uncontrolled cracking 1/3 to 1/4 depth

Surface Smoothness


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Surface Smoothness

Unsurfaced RCC can

be built for low to

medium speed traffic

High density paver

achieves good ride

quality

Joints/cracks do not

affect ride quality

99th Ave Portland, OR - 12 yrs


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Portland Cement Association

www.cement.org/

pavements

2 d luhr-rcc applications

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