1. Shandong Jianzhu University, Shandong, China
Performance Evaluation of Cold Patching Asphalt Mixture Containing Wasted Cooking Oil
Litao Geng
Shandong Jianzhu University, Shandong, China

2. CONTENT 01 Background 02 Cold Patching Asphalt Mixture 03 Application04
Conclusions

3. CONTENT 01 Background 02 Cold Patching Asphalt Mixture 03 Application04
Conclusions

4. Delicious Chinese Food
Hot pot
Spicy crayfish
Mapo Tofu
Twisted cruller

5. Environmental pollution
Faked edible oil, illegal secondary sale

6. Pavement Pothole Common diseases of asphalt pavement
Influencing vehicle safety and comfort
Shortening the service life of pavement

7. Traditional Repair Method: HMA
Mature technology
Low unit cost
Cant produce in small quantities
Unable to repair in time
Unable used in winter or rainy season
Too many human and equipments
Excess material wasted

8. Advantages of Cold patching asphalt mixture CPAM
Energy saving and emission reduction, low carbon, environmental protection
Repair in time, at any season
No need for heavy compaction equipment
Surplus can be used, avoiding waste

9. Current Situation of CPAM
Imported CPAM：
Good performance, high price
Domestic CPAM：
Low price, poor performance
Case: in Liaoning province: one year failure rate >70%
Cause：
SBS and petroleum resin as agent fomula
Poor adhesion between asphalt and aggregate.

10. Filtered then cleaned by acticarbon
How about reuse wasted cooking oil for pothole repair?
wasted cooking oil
Filtered then cleaned by acticarbon
After treated

11. Research Purpose
Research and develop high performance and environmental friendly CPAM：
Easy to store and construct
Long stored life
All-weather construction
Low cost, good performance

12. CONTENT 01 Background 02 Cold Patching Asphalt Mixture 03 Application04
Conclusions

13. Development of Additives for CPAM
Vsiloxane, polythylene glyco and other agents were used to synthesize additives.
Purpose
improve low temperature stickiness
weathering resistance
peeling resistance
And bonding strength with existing pavement.

14. Research and Development of Additives for CPAM
According to our research, the optimum content of additives is 3%.
1% additive:
loose
3% additive:
combined

15. Research and Development of CPA
heat base asphalt to 110 ℃ in oven
Stirring 30 min
Adding additives
adding wasted cooking oil and diesel
Stirring 1.5hr

16. Brookfield viscosity asphalt /dizel 81/16 79/18 77/20 75/22 73/24
3% additive
2.398
1.930
1.295
1.122
865
without additive
2.392
2.023
1.503
1.165
890

17. Brookfield viscosity
Brookfield viscosity value of 0.8 to 1.6 Pa·s at 60 °C for cold patching asphalt liquid would be appropriate.
Suggested cold patching asphalt liquid formulation: 73% to 77% of basic asphalt, 20% to 24% of diesel, 3% of additive.

18. Research and Development of CPAM
Gradation Design：
Three aggregate gradations are compared.
Screen size /mm
Passing percent /%
9.5
4.75
2.36
1.18
0.3
Gradation A
100 82 27 8 1
Gradation B 62 12 2
Gradation C 50 9

19. Small amount of fine aggregate is suggested.
Gradation
Appearance
Percentage of gray aggregate /% A
Dotted distribution of binder, ash grey
>50 B
Uneven coating, black grey
10-20 C
Even coating, oily luster
Gradation A
Gradation B
Gradation C
Small amount of fine aggregate is suggested.

20. Asphalt Content Small amount of asphalt： Large amount of asphalt：
asphalt can not cover the surface of aggregate sufficiently
road surface is easy to loose
Large amount of asphalt：
Poor high-temp. performance
high cost

21. Asphalt Content The optimal binder content: 4.7-4.9%
mixture getting loose
asphalt content >4.9%:
mixture can be striped.
The optimal binder content: %

22. Adhesion Test and Analysis
Adhesion evaluation: water boiling test.

23. coating rate after boiling 3min / %
asphalt number
wasted cooking oil / %
diesel / %
coating rate after boiling 3min / %
coating rate after boiling 5min / %
coating rate after boiling 7min / % ① 7 13 48 22 ② 5 15 84 71 64 ③ 3 17 99 97

24. 3% wasted cooking oil after boiling 7min :
even coating
7% wasted cooking oil after boiling 7min:
Dotted distribution of binder
5% wasted cooking oil after boiling 7min:
uneven coating

25. N-CPAA can enhance the cohesion of CPAM effectively.
Cohesion Test and Analysis
Binder content /%
Status
4.7(with additive)
Combined
4.7(without additive)
Loose
4.9(with additive)
4.9(without additive)
N-CPAA can enhance the cohesion of CPAM effectively.

26. Application Instance potholes at Shandong Jianzhu University
trial lot at Shenyang, China

27. Cost Analysis 391 Domestic CPAM: 800~1000 RMB /t
material
unit-price (RMB/t)
Quality (kg)
Cost (RMB)
Total cost (RMB)
base asphalt
4000
36.8
147
391
diesel
5300
10.3
54.6
additive
50000
1.5 75
aggregate
120
951
114.1
wasted cooking oil
500
0.5
0.25
Domestic CPAM: 800~1000 RMB /t
Imported CPAM: 1600~1800 RMB /t

28. Conclusion

29. THANK YOU！