17
Shongtao Dai Office of Materials and Road Research Minnesota Department of Transportation June 10 th , 2014 Mn/DOT Office of Materials and Road Research Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

  • Upload
    others

  • View
    0

  • Download
    0

Embed Size (px)

Citation preview

Page 1: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Shongtao Dai

Office of Materials and Road Research

Minnesota Department of Transportation

June 10th, 2014

Mn/DOT

Office of Materials and Road Research

Effects of Implements of

Husbandry “Farm Equipment”

on Pavement Performance

Page 2: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

A pooled fund study participants:

IL DOT

Industries Represented by Professional Nutrient Applicators Association of Wisconsin (PNAAW)

Iowa DOT

Wis. DOT

Minnesota Local Road Research Board (LRRB)

MnDOT

Private Industry:

PNAAW

John Deere, CaseIH, AgCo,

Houle Farm Equipment

Husky Farm Equipment

Minnesota, Iowa, Ohio, Michigan, Manure Applicators Associations

Michelin, Firestone/Bridgestone

PIs: Univ. of MN; Iowa state Univ.

Page 3: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Major Objectives

Determine pavement responses to

selected agricultural equipment using

instrumented pavements.

Compare pavement response to typical

5-axle semi.

Page 4: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Research Approach Cell 84 at MnROAD

5.5” HMA with PG58-34

9” gravel aggregate base

A-4 subgrade soil

Cell 83 at MnROAD 3.5” HMA with PG58-

34

8” gravel aggregate base

A-4 subgrade soil

5.5” HMA

8in. Aggregate base

A6 clay subgrade

9” Aggregate base

Page 5: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Existing PCC

section 54

7.5” PCC

12” aggregate base

Existing PCC

section 32

5.5” PCC

12” aggregate base

5.0” PCC

8in. Aggregate base

subgrade

6” Aggregate base

7.5” PCC

8in. Aggregate base

subgrade

12” Aggregate base

Page 6: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Tested Vehicles

Page 7: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Axle Weight Measured

Page 8: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance
Page 9: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Contact pressure gauge (Tekscan)

0%

7,980 lbs

50%

19,550

lbs

80%

24,680

lbs

Page 10: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Test Statistics

Test Season Test Dates Vehicle Passes

AC PCC

Spring 2008 March 17th

– 19th

& 24th

– 26th

400 48

Fall 2008 August 26th

– 29th

282 72

Spring 2009 March 16th

– 20th

960 170

Fall 2009 August 24th

– 28th

782 360

Spring 2010 March 15th

– 18th

776 344

Fall 2010 August 18th

– 19th

426 204

Total 3,626 1,198

Page 11: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Failure Cell 32 Cell 83

Page 12: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Major Findings

All tested vehicles resulted in higher subgrade

stresses than the standard truck.

Pavement damage is governed by axle weight,

not the gross vehicle weight. Therefore, it is

important to ensure even load distribution

among axles.

Page 13: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

A fully loaded 1,000 bushels grain cart caused

the highest pavement stresses and strains. It

was followed by fully loaded terragators 9203

and 3104.

Page 14: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Presence of a paved shoulder reduces damage

potential. In the absence of a paved shoulder,

allowing to drive in the middle of roads (away

from the edge) reduces a risk of pavement

failure.

Pavement damage can be reduced if the most

unfavorable conditions (fully saturated and/or

thawed base and subgrade, high AC

temperature) are avoided.

Page 15: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

LTC Discussion

Implementation Approaches and

Outcome

How have you used the results?

What additional opportunities are there to use the

results?

What are the barriers to implementing the

findings? How could they be overcome?

What outreach products or support would help

improve implementation of this project?

Page 16: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Did this project solve the problem identified? Is additional research needed?

What was the single most useful outcome from this study?

What improved or changed as a result of this research?

Did this project result in cost or time savings? How did you calculate it?

LTC Design Discussion

Research Value and Benefits

Page 17: Husbandry “Farm Equipment”€¦ · Effects of Implements of Husbandry “Farm Equipment” on Pavement Performance

Thank you!