how to talk like a local - acpa. · pdf filehow to talk like a local: ... merritt et al. 2015....

How to talk like a local:

“May-ner”

“Burn-it”

“Gwad-loop”

“Man-Shack”

Overview

Importance of Pavement Smoothness Current State of Smoothness

Specifications Keys to Achieving Pavement Smoothness

Requirements1. Construction Practices2. Monitoring Your Work

Importance of Pavement Smoothness

Contractor Perspective1. Reflects the quality of your work (and the

industry?)2. $$$ (Incentives/Disincentives/Corrective

Work)

Current Smoothness Specifications

Merritt et al. 2015

Merritt et al. 2015



Summary of IRI-based specification thresholds for concrete pavement

Merritt et al. 2015

Incentive Upper Limit

Full Pay Lower Limit

Full Pay Upper Limit

Disincentive Lower Limit

Disincentive Upper Limit

Threshold for

Correction

MRI & IRI

(22 states)

min 39.9 40.0 54.0 54.1 67.5 60.0 max 70.0 71.0 93.0 93.1 140.0 150.0 avg. 56.2 56.5 71.7 72.5 95.3 96.9

HRI (CO only) 57.9 58.0 67.0 67.1 85.0 85.0


Range of Incentives/Disincentives

Merritt et al. 2015

Pay Adjustment Basis Maximum Incentive

Maximum Disincentive

$ per lot (0.1 mi) 9 states

min $200 -$250 max $1,600 -$1,750 avg. $879 -$900

$ per lot (SY) 2 states

min $1.40 -$1.12 max $1.40 -$1.40 avg. $1.40 -$1.26

$ per lot (1.0 mi) 1 state

$7,350 -$7,350

$ per lot (0.01 mi) 1 state

$50 -$500

$ per lot (500 ft.) 1 state

$250 -$250

Extended Pay Adjustment $ per lot (0.1 mi)

13 states (NJ excluded)

min $200 -$250 max $1,600 -$1,750 avg. $825 -$831

Percent Contract Price 7 states

min 102% 90% max 108% 50% avg. 105% 75%

Concrete Pavement(3 states)

Min -$10

Max -$250

Average -$173

Localized Roughness

Overview

Importance of Pavement Smoothness Current State of Smoothness

Specifications Keys to Achieving Pavement Smoothness

Requirements1. Construction Practices2. Monitoring Your Work

Keys to Pavement Smoothness

1. Construction Practices

The “Sweet Spot”

Mixture Factors

Paving Factors

Human Factors

Stolen from: Gary Fick




The “Sweet Spot”

Mixture Factors

Paving Factors

Human Factors




The “Sweet Spot”?

Mixture Factors

Paving Factors

Human Factors


1. Construction Practices: Mixture FactorsCombined gradation

Reduced paste content Improved workability Durability

Between batch uniformity Consistent combined gradation

and water contentUniform delivery of concrete

Minimizing paver stops

Tarantula Curve


1. Construction Practices: Paving FactorsTrack lineStringline/Stringless modelPaver setup

Draft/Lead Sensitivities Vibrator frequency Vibrator height Float pan

Concrete headFinishing, Curing and texturing


1. Construction Practices: Paving FactorsProfile – trimmed or stabilized base placed

with grade controlStability – non-yielding and non-pumpingWidth – full width of track supported


1. Construction Practices: Paving FactorsDoes hand finishing improve pavement

smoothness?

Distance (ft)

Real-TimeHardened

IRI (

in/m

i)


1. Construction Practices: Human FactorsEveryone on the project contributes to

smoothness Training Experience Communication Empowerment


2. Monitoring Your Work Check your work (hardened profiles) DAILY.

Lightweight Inertial Profiler


2. Monitoring Your Work Check your work (hardened profiles) DAILY.

Tractor-Based ProfilerWalking Profilers


2. Monitoring Your Work Use Real-Time profilers to check your work

as you pave.

Real-Time Smoothness Technology

GOMACO GSI Ames RTP


2. Monitoring Your Work Note effects of construction operations on

smoothness numbers (real-time and/or hardened). Mixture changes Paver operation (paver setup, paver stops, etc.) Crew changes Other factors (weather, etc.)

Be wary of the warp (and curl) Time of day for profile data collection can

significantly impact IRI values.


2. Monitoring Your Work Use ProVAL to analyze profile data.

Identify effects of paving processes on smoothness.

Identify systematic “patterns” of roughness caused by paving operations.

Pinpoint corrective action

www.RoadProfile.com


2. Monitoring Your WorkUse ProVAL to identify “patterns” of

roughness caused by paving operations.What happening at 10.5’-11’?

15’ Joint Spacing

??

Real-Time Profiles


2. Monitoring Your WorkUse ProVAL to identify “patterns” of

roughness caused by paving operations.What happening at 10.5’-11’?

15’ Joint Spacing??Hardened Profiles


2. Monitoring Your WorkRoughness spikes every 300-400 ft on right

side. What is it?

Distance (ft)

IRI (

in/m

i)

RTP-LeftRTP-Right


2. Monitoring Your WorkRoughness spikes every 300-400 ft on right

side. Is it in the hardened profile as well?

Distance (ft)

IRI (

in/m

i)

Real-TimeHardened


2. Monitoring Your WorkUse ProVAL to pinpoint corrective action.Grinding Simulation – will grinding help?

Distance (ft)

IRI (

in/m

i)


2. Monitoring Your WorkUse ProVAL to pinpoint corrective action.Grinding Simulation – will grinding help?

Distance (ft)

IRI (

in/m

i)

Before GrindingAfter Grinding

Yes Yes

No


2. Monitoring Your Work

IRI (

in/m

i)

Distance (ft)

Elev

atio

n (in

)

Roughness

vs.

Profile

Dip


How to Reduce Must-Grinds and Increase Profits:1. Good Construction Practices – finding the

“sweet spot”.2. Monitoring Your Work – using tools such as

Real-Time Smoothness and ProVAL.

how to talk like a local - acpa. · pdf filehow to talk like a local: ... merritt et al. 2015....

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