1. Board Meeting Agenda Item 11 April 21, 2009
Today decides tomorrow!!!
Presentation Of A Chico State Student Engineering Project That Resulted From Curricula Development Contract For Rubberized Asphalt Concrete And Civil Engineering Uses Of Tire-Derived Aggregate
Presented by:
Albert Johnson, CIWMB; Ding Cheng, PhD, CP2 Center
Cody Menefee, CSUC Student; Julian Storelli, CSUC Student
April 14, 2009

2. Introduction Project Objective Project Management Team
Board Meeting
Introduction
Project Objective
Project Management Team
Project Schedule

3. Project Overview Continuing Education of Professionals
University Curricula Development
Professor Training Workshops

4. Workshops for Professionals
Created website for storing resource information
Developed presentation materials
Presentations at various conferences or workshops
CAAPA (California Asphalt Paving Association) technical meeting -August 2008
2008 MSA (Maintenance Superintendent Association) annual meeting – August 2008
2009 TRB (Transportation Research Board) annual conference – January 2009
2009 ASEE-PSW (Pacific Southwest Division of American Society for Engineering Education) conference – March 2009
APWA (American Public Work Association) northern CA meeting – April 2009

5. Roadmap of Waste Tire in University Education Curricula

6. Eleven Civil Engineering Classes in CSU Chico
CIVL 131 Introduction to Civil Engineering Design
CIVL 311/CMGT345 Strength of Materials
CIVL 312 Structural Testing Lab
CIVL 402 Contract Spec and Technical Writing
CIVL 411 Soil Mechanics
CIVL 415 Reinforced Concrete Design
CIVL 431 Environmental
CIVL 441 Transportation
CIVL 551 Foundation
CIVL 575 Solid Waste
CIVL 598 Asphalt Paving Materials
Curricula Are Online

7. Professor Training Workshops
Board Meeting
Professor Training Workshops
Sacramento, CA – December 2008
Pomona, CA – January 2009
San Luis Obispo, CA – April 2009
30 Professors
15 Universities

8. Sample Student Presentations
Board Meeting
Sample Student Presentations
2008 Transportation Engineering class and Contract class
Students formed groups to solve problems with RAC and TDA
The following is a student group lab assignment. They have a hypothetical company ECS and hypothetical project. 8

9. Environmental Construction Services (ECS)
Board Meeting
Environmental Construction Services (ECS)
Presented by students:
Cody Menefee, and
Julian Storelli
A civil engineering consulting firm specializing in the development of environmentally sensitive construction practices.
Our mission statement is to educate companies on environmentally conscious construction methods..

10. Waste Tires in California
Board Meeting
Waste Tires in California
40 Million Waste Tires produced annually
About 75% recycled
1.5 million have been illegally dumped and stockpiled
10 Million waste tires left in California which can:
pollute the ground
expose community to disease
create fire hazards 10

11. Project Location

12. How ECS can help with the expansion of highway 99
Board Meeting
How ECS can help with the expansion of highway 99
Utilizing Rubberized Asphalt Concrete (RAC) in the expansion of highway 99.
Using recycled tire aggregate (TDA) as retaining wall backfill.
Slope stabilization using recycled tire aggregate.

13. Rubberized Asphalt Concrete:
Board Meeting
Rubberized Asphalt Concrete:
What is RAC?
RAC or RHMA is a composite of traditional asphalt mix and recycled tire rubber
Background
Developed in Arizona in 1960’s.
Caltrans began use in 1978.
California, Arizona, Texas, Florida have used extensively
Used in chip seals, inter-layer, and hot-mix asphalt

14. Los Angeles, Ca One year later
Original Condition
One year later

15. 5 years later
10 years later

16. ECS has investigated Highway 99 from the skyway exit to route 32
RAC can be utilized throughout the entire project
2.1 miles
88,700 yd2 of asphalt
(does not include on/off ramps)

17. Benefits Utilizes waste tires (2000 tires per lane mile).
Board Meeting
Benefits
Utilizes waste tires (2000 tires per lane mile).
=25,000 tires on this project
Reduces vibration
Reduces noise
Less maintenance
Improves durability
Improves traction
Reduces the spray/splash and eliminates standing water when raining
Increases contrast / improves stripping visibility

18. Board Meeting Using Tire Derived Aggregates
Retaining Wall
Backfill
Using Tire Derived Aggregates 18

19. Tire Derived Aggregates (TDA)
Board Meeting
Tire Derived Aggregates (TDA)
Shredded chips of waste tires
Range in size from 12 inches to 3 inches for shreds and 3 inches to .5 inch for chips
Can be used mixed with soil
Usually enclosed in a geotextile fabric then covered with soil
Specific Gravity of tire chips between 1.1 and 1.3 19

20. TDA as Backfill for Retaining Wall
Board Meeting
TDA as Backfill for Retaining Wall
Pros:
TDA reduces unit weight of fill material allowing for construction on areas with low bearing capacity
Decreases the overturning moment
TDA gives good permeability as a coarse granular alternative
Improves compressibility 20

21. Example Applications Maine (1996) California (2003)
Board Meeting
Example Applications
Maine (1996)
Topsham - bridge abutment wall
California (2003)
Riverside – Retaining wall along west bound route 91 21

22. Retaining Wall Location
Board Meeting
Retaining Wall Location 22

23. Benefits Reduction of Wall Size:
Board Meeting
Benefits
Reduction of Wall Size:
Reduction in the cost of materials
Reduction in labor
California Department of Transportation can save up to $13,000 / 100ft
Stockpiles in California reduced by 75 tires per cubic yard 23

24. ECS Final Recommendations
Use the following Processes
RAC
Retaining Walls
Slope Stabilization
Benefits
Environmental
Financial
Social

25. Keeping Good Use of Waste Tire
THANK YOU
The Beginning
Keeping Good Use of Waste Tire