Shongtao Dai, Ph.D, PE - PowerPoint PPT Presentation
1 / 29
Title:
Shongtao Dai, Ph.D, PE
Description:
Study initiated by Professional Nutrient Applicators Association of Wisconsin ... Constructed in 1994 and located about 40 miles NW of the Twin Cities. ... – PowerPoint PPT presentation
Number of Views:114
Avg rating:3.0/5.0
Title: Shongtao Dai, Ph.D, PE
1
Effects of Implements of Husbandry Farm
Equipment on Pavement PerformanceMid 2008
Summary
- Shongtao Dai, Ph.D, PE
- Office of Materials
- Minnesota Department of Transportation
- 6/24/08
- Kevin Erb
- University of Wisconsin Extension
- 9/22/08
2
Background
- Study initiated by Professional Nutrient
Applicators Association of Wisconsin (PNAAW) in
consultation with the Wisconsin Towns
Association. - Several others with similar interest, including
- Minnesota County Highway Engineers.
3
Background
- Determined early on that this is an issue bigger
than just Wisconsin - Contacted DOT in 8 states.
- Examined existing testing facilities
- Chose to partner with Minnesota DOT
- Existing research facility (MnROAD)
- Similar needs identified
4
Background
- Created a multi state Pooled Fund Research Study
(2007-2010) - Allowed states and federal government to join
- project.
- Iowa, Minnesota, Illinois DOT, Mn Local Road
- Research Board (LRRB).
- Wisconsin DOT chose not to participate (yet)
5
Background
- Industry Partnership
- Manure Applicator Associations (WI, MN, IA, OH,
- PA, MI)
- Farm equipment manufacturers
6
Major Objectives
- Determine pavement responses to selected
agricultural equipment using instrumented
pavements. - Compare pavement response to typical 5-axle semi
(80,000 lbs).
7
Research Approach
- Construct two asphalt test sections that
represent typical local roads - Utilize existing concrete pavement test sections
at test facility (MnROAD) - Visually assess gravel road
8
What is MnROAD?
- Very comprehensive pavement research facility.
- Constructed in 1994 and located about 40 miles
NW of the Twin Cities. - Mainline and Low Volume Road.
- Originally more than 4500 sensors embedded within
40 sections - Strain gauges, LVDTs, TDRs, Thermocouples,
pressure cells.
http//www.dot.state.mn.us/mnroad/index.html
9
Research Approach
- Construct two asphalt test sections on MnROAD
research facility (A B)
B
A
10
- Cell 83 (Thin)
- 3.5 HMA with PG58-34
- 8 gravel aggregate base
- A-4 subgrade soil (existing subgrade soil).
- Cell 84 (Thick)
- 5.5 HMA with PG58-34
- 9 gravel aggregate base
- A-4 subgrade soil (existing subgrade soil).
3.5 HMA
5.5 HMA
8 Aggregate base
8in. Aggregate base
9 Aggregate base
A6 clay subgrade
A6 clay subgrade
11
Research Approach
- Utilize existing concrete pavement test sections
at test facility
12
- Existing PCC sections on MnROAD
- Cell 32
- 5 PCC
- 6 Aggregate base
- Cell 54
- 7.5 PCC
- 12 Aggregate base
5 PCC
7.5 PCC
6 Aggregate base
12 Aggregate base
A6 clay subgrade
A6 clay subgrade
13
Research Approach
- Build sensors into and below pavement to
determine impact of farm equipment compared to an
80,000 lb semi
14
Research Approach
- Strain Gauges measures strain to surface layer
(asphalt or concrete) at bottom of layer, edge
of road - Deflection gauges (LVDT) deformation of pavement
sections/segments - Contact Pressure (surface) tire-pavement foot
print and pressure distribution - Temperature/moisture
15
- Instrumentation of Test Sections
- Strain gauges bottom of HMA (18 per section)
- Pressure in base (6 per section)
- LVDTs (3 per section)
- Base moisture measurement TDR ECH20 (8 per
section) - Thermocouples (32 in cell 83 16 in cell 84)
16
- Contact pressure gauge (Tekscan)
17
Project Status
- Spring April 2007
- Developed workplan
- Select test equipment
- Construction done Oct. 2007
- Trial Test Dec. 2007
18
Project Status
- 1st Spring test Between Mar 17 27, 2008
(Spring thaw period) - Manure trucks, tires, sprayers
- 1st Fall test Aug 25-Sept 5 (dry fall)
- Large tankers, flotation tires
- 3 year project
- 2 weeks in spring
- 2 weeks in fall
19
Yellow are Spring 2008 tested. Pink are Fall 2008
tested equipment
20
S1 4400 gal
S2 4400 gal
S3 1800 gal
21
T1 6000 gal
T2 4000 gal
T3 6000 gal
22
9500 gal
7300 gal
6000 gal
23
Test Configuration
- 4 different weight 0 25 50 80 full
- These 4 percentages allow us to determine the
effects of different types of manure and
different tank sizes. - 3 different speed Static 5 mph 10 mph
- Offset from pavement edge 0 12 inches
24
Test Results
- Our goal is to have a wet/dry fall and wet/dry
early spring test. - Full data will be available when completed
25
Test Results
- Preliminary Data
- Tire designs have an impact (brighter color
more pressure on pavement) 6,000 gal tanker _at_
80
80 full
0 full
26
Test Results
- Preliminary Data
- Fall 7500 gal tanker (0, 80 full), 80,000 lb
semi - Each colored square is 0.7 inches by 0.7 inches
80,000 lb Semi
0 full
80 full
27
- Pavement Performance (Rutting)
28
Test Results
- Preliminary presentation of 1st year data
January, 2009 - Full data will be available when completed
29
Thank you
Recommended
CrystalGraphics Presentations
![[PDF READ] Free Caregiver Daily Log: Caregiver Medical Journal / A Dai PowerPoint PPT Presentation](https://s3.amazonaws.com/images.powershow.com/10086944.th0.jpg?_=202407270912)
![❤️[READ]✔️ Danielle Walker's Eat What You Love: Everyday Comfort Food You Crave Gluten-Free, Dai PowerPoint PPT Presentation](https://s3.amazonaws.com/images.powershow.com/10070640.th0.jpg?_=20240702083)
