Asphalt Pavement Magazine - March/April 2018 - 11

Industry News

The latest NAPA/FHWA survey of asphalt producers'
use of recycled materials and warm-mix asphalt finds
that more than 79 million tons of recycled materials -
mostly reclaimed asphalt pavement and recycled asphalt
roofing shingles - were used in new asphalt pavements
during 2016. Reclaiming and reusing the asphalt cement
and aggregate in RAP and RAS saved more than $2.1
billion in 2016, compared to the use of virgin materials,
and saved nearly 50 million cubic yards of landfill space.
The survey also found that nearly 117 million tons of
WMA was produced, which is 31 percent of all asphalt
pavement mixture produced in 2016.
"The use of warm-mix asphalt technologies is
becoming commonplace. In 14 states, more than half of
all asphalt pavement mixtures were produced as warmmix asphalt, and in three of them, more than 75 percent
was produced as warm mix," stated NAPA President Mike
Acott. "This said, there remains room to increase its use,
and we expect road owners to continue to embrace these
technologies for their construction and performance
benefits, as well as the energy savings they bring."

©GUSTAVO FRAZA/SHUTTERSTOCK

Asphalt Remains the U.S.'s
Most-Recycled Product

NAPA thanks the member companies that
participated in the survey, which provides the data
needed to quantify the environmental benefits of
asphalt pavements. Results from 229 companies with
1,146 plants in all 50 U.S. states, along with data from
state asphalt pavement associations for 34 states, were
used to compile the report. A full copy of the 2016
survey, including appendices with state-level data, can
be downloaded from www.AsphaltPavement.org/recycling.
These results are also used by FHWA, Energy Information
Administration, Environmental Protection Agency, and
other federal, state, and local agencies to determine the
impact of recycled materials and WMA.

All asphalt mix producers operating in the United States and in U.S. territories are encouraged to participate in the confidential 2017
construction season survey by April 1. To participate, visit www.surveymonkey.com/r/RMWMASurvey2017.

New Aging Method Proposed
in NCHRP Report

©ROBERT KNESCHKE/SHUTTERSTOCK

The National Cooperative Highway Research Program
(NCHRP) Report 871: Long-Term Aging of Asphalt
Mixtures for Performance Testing and Prediction proposes a
replacement for the method in AASHTO R 30, "Mixture
Conditioning of Hot Mix Asphalt (HMA)." For the
past 25 years, R 30 has been the most commonly used
method for aging asphalt materials for performance
testing prediction models. The proposed method
improves on R 30 by using the project location's
climate to determine laboratory aging time. A copy
of the NCHRP report is available at www.trb.org/main/
blurbs/176937.aspx.

Two State DOTs Publish
Technical Reports
State transportation agencies
in Maryland and Missouri
released research reports relevant
to the asphalt pavement industry. The Missouri
DOT report (available at http://bit.ly/2mpsjKj) looks
at local calibration of thermal cracking inputs
for MEPDG software. In particular, the report
determines creep compliance and tensile strength
of top-lift cores and asphalt surface, binder, and
base course mixes. The Maryland DOT report
(available at http://bit.ly/2Evotpz) evaluates the
hydraulic and environmental behavior of reclaimed
asphalt pavement (RAP) millings when used in
highway shoulder applications. The study found
the hydraulic conductivity of RAP comparable to
that of natural aggregates used in shoulder edge
drop-offs. Further, the metals content in leachate
from the RAP material was well below EPA water
quality limits.

more Industry News on page 13
Asphalt Pavement Magazine - March/April 2018 * 11


http://www.AsphaltPavement.org/recycling http://www.surveymonkey.com/r/RMWMASurvey2017 http://www.bit.ly/2mpsjKj http://www.trb.org/main/blurbs/176937.aspx http://www.trb.org/main/blurbs/176937.aspx http://www.bit.ly/2Evotpz

Table of Contents for the Digital Edition of Asphalt Pavement Magazine - March/April 2018

President’s Perspective
Industry News
Tools for the Trade
Meet the Chairman: Craig Parker
How to Host an Effective Congressional Site Tour
Quality in Construction: The Sheldon G. Hayes Award
Quality in Construction: The Larry H. Lemon Awards
Quality in Construction: The Ray Brown Airport Award
NAPA Quality in Construction Awards
Industry Calendar
Index of Advertisers / Advertisers.com
Perspectives
Asphalt Pavement Magazine - March/April 2018 - Intro
Asphalt Pavement Magazine - March/April 2018 - cover1
Asphalt Pavement Magazine - March/April 2018 - cover2
Asphalt Pavement Magazine - March/April 2018 - 3
Asphalt Pavement Magazine - March/April 2018 - 4
Asphalt Pavement Magazine - March/April 2018 - 5
Asphalt Pavement Magazine - March/April 2018 - 6
Asphalt Pavement Magazine - March/April 2018 - 7
Asphalt Pavement Magazine - March/April 2018 - President’s Perspective
Asphalt Pavement Magazine - March/April 2018 - 9
Asphalt Pavement Magazine - March/April 2018 - 10
Asphalt Pavement Magazine - March/April 2018 - Industry News
Asphalt Pavement Magazine - March/April 2018 - 12
Asphalt Pavement Magazine - March/April 2018 - 13
Asphalt Pavement Magazine - March/April 2018 - 14
Asphalt Pavement Magazine - March/April 2018 - 15
Asphalt Pavement Magazine - March/April 2018 - Tools for the Trade
Asphalt Pavement Magazine - March/April 2018 - 17
Asphalt Pavement Magazine - March/April 2018 - Meet the Chairman: Craig Parker
Asphalt Pavement Magazine - March/April 2018 - 19
Asphalt Pavement Magazine - March/April 2018 - 20
Asphalt Pavement Magazine - March/April 2018 - 21
Asphalt Pavement Magazine - March/April 2018 - How to Host an Effective Congressional Site Tour
Asphalt Pavement Magazine - March/April 2018 - 23
Asphalt Pavement Magazine - March/April 2018 - 24
Asphalt Pavement Magazine - March/April 2018 - 25
Asphalt Pavement Magazine - March/April 2018 - Quality in Construction: The Sheldon G. Hayes Award
Asphalt Pavement Magazine - March/April 2018 - 27
Asphalt Pavement Magazine - March/April 2018 - 28
Asphalt Pavement Magazine - March/April 2018 - 29
Asphalt Pavement Magazine - March/April 2018 - 30
Asphalt Pavement Magazine - March/April 2018 - 31
Asphalt Pavement Magazine - March/April 2018 - 32
Asphalt Pavement Magazine - March/April 2018 - 33
Asphalt Pavement Magazine - March/April 2018 - 34
Asphalt Pavement Magazine - March/April 2018 - 35
Asphalt Pavement Magazine - March/April 2018 - 36
Asphalt Pavement Magazine - March/April 2018 - 37
Asphalt Pavement Magazine - March/April 2018 - 38
Asphalt Pavement Magazine - March/April 2018 - 39
Asphalt Pavement Magazine - March/April 2018 - Quality in Construction: The Larry H. Lemon Awards
Asphalt Pavement Magazine - March/April 2018 - 41
Asphalt Pavement Magazine - March/April 2018 - 42
Asphalt Pavement Magazine - March/April 2018 - 43
Asphalt Pavement Magazine - March/April 2018 - 44
Asphalt Pavement Magazine - March/April 2018 - 45
Asphalt Pavement Magazine - March/April 2018 - 46
Asphalt Pavement Magazine - March/April 2018 - 47
Asphalt Pavement Magazine - March/April 2018 - 48
Asphalt Pavement Magazine - March/April 2018 - 49
Asphalt Pavement Magazine - March/April 2018 - 50
Asphalt Pavement Magazine - March/April 2018 - 51
Asphalt Pavement Magazine - March/April 2018 - 52
Asphalt Pavement Magazine - March/April 2018 - 53
Asphalt Pavement Magazine - March/April 2018 - Quality in Construction: The Ray Brown Airport Award
Asphalt Pavement Magazine - March/April 2018 - 55
Asphalt Pavement Magazine - March/April 2018 - 56
Asphalt Pavement Magazine - March/April 2018 - 57
Asphalt Pavement Magazine - March/April 2018 - 58
Asphalt Pavement Magazine - March/April 2018 - 59
Asphalt Pavement Magazine - March/April 2018 - 60
Asphalt Pavement Magazine - March/April 2018 - 61
Asphalt Pavement Magazine - March/April 2018 - NAPA Quality in Construction Awards
Asphalt Pavement Magazine - March/April 2018 - 63
Asphalt Pavement Magazine - March/April 2018 - 64
Asphalt Pavement Magazine - March/April 2018 - 65
Asphalt Pavement Magazine - March/April 2018 - 66
Asphalt Pavement Magazine - March/April 2018 - Industry Calendar
Asphalt Pavement Magazine - March/April 2018 - Index of Advertisers / Advertisers.com
Asphalt Pavement Magazine - March/April 2018 - 69
Asphalt Pavement Magazine - March/April 2018 - Perspectives
Asphalt Pavement Magazine - March/April 2018 - cover3
Asphalt Pavement Magazine - March/April 2018 - cover4
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