Pioneer Trl ~ Base One - Conference Planning and Management

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Pioneer Trl ~ Base One - Conference Planning and Management

2008 Road Dust Management

Practices and Future Needs

Conference

John’s Review

"You can’t make a weak man strong by making a strong man weak"

— Abraham Lincoln


State of the Practice

―Unacceptable levels of dust, poor ride quality, and

impassability in wet weather are experienced on

much of this global unsealed road network, and

although it is acknowledged that these roads are

fundamental to the economies of almost every

country in the world, many of the management

practices followed leave much to be desired, with

programs for dust control, chemical stabilization,

low-cost upgrading, ect, largely overlooked.‖


State of the Practice

• Guidelines for Application and

Maintenance

• Life-Cycle Analysis

• Environmental Impacts

• Designed Treatments

• National Group

• Test Methods


Reason for Concern

• Studies in the U.S.

Indicate as much as

50% PM10 emissions

and 19% of PM2.5

emissions result from

Road Dust.

Road Dust

Misc.

Fires

Industrial Processes

Electricity Generation


Reason for Concern

• Loss of fines

– Results in accelerated gravel loss requiring

additional material.

– Allows more rapid deterioration of riding

quality of the road requiring more frequent

grading.


Categorizing Additives – Dust

Palliatives

• Sub-Categories

– Water

– Hygroscopic Salts

– Natural Polymers

– Synthetic Polymer

Emulsions

– Synthetic Oils

– Petroleum resins

– Bitumen, asphalt, tar

• Examples

– Duh…..

– Magnesium Chloride

– Lignosulfate

– Vinyl Acetates,

acrylates, acrylics

– Mineral Oils

– Petroleum products


Compaction Aids and Stabilizers

• Sub Categories

– Synthetic Polymer

– Synthetic Oils

– Sulfonated Oils

– Enzymes and

Biological Agenst

– Bitumen, asphalt and

tar

– Cementitious

• Examples

– Acrylates, Acrylics

– Synthetic Iso-Alkaines


The Way Forward

• Certification of Additives

– Fit-for-purpose Certification to allow informed

decisions to be made regarding additive use.

– Identify strengths and limitations of each

product.

– Compares new products to existing and

provides guidance for determination of

economic and engineering advantages.


The Way Forward

• A Best Practices guide is in development.

• An organizational structure to certify

products, recommend usage and focus

research is being created.

"If we knew what it was we were doing, it would not be called research, would it?"

— Albert Einstein


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One


Pioneer Trl ~ Base One

"Loyalty to country ALWAYS. Loyalty to government, when it deserves it."

— Mark Twain


Pioneer Trl ~ Base One

• Findings

– This was a stabilization product, not a dust

control product. The surface made an

excellent crust that did ravel and dust after an

extended dry period.

– Grader operator claims this road is still

―harder than the dickens‖.

– This is a very water intensive operation that

should not be done in July.


Pioneer Trl ~ Base One

• Findings (continued)

– Never pull your pneumatic roller with a

tractor with Ag lugs, it makes rumble

strips.

– We all recognize density as the

measurement of quality in pavements and

soils yet we don’t acknowledge its

importance in our rock surfacing….WHY

NOT?


Questions?

""To laugh often and much; to win the respect of intelligent people and the

affection of children; to earn the appreciation of honest critics and to endure

the betrayal of false friends; to appreciate beauty; to find the best in others; to

leave the world a bit better whether by a healthy child, a garden patch or a

redeemed social condition; to know even one life has breathed easier because

you have lived. This is to have succeeded.""

— Ralph Waldo Emerson

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