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

CONTENT 01 Background 02 Cold Patching Asphalt Mixture 03 Application 04 Conclusions

CONTENT 01 Background 02 Cold Patching Asphalt Mixture 03 Application 04 Conclusions

Delicious Chinese Food Hot pot Spicy crayfish Mapo Tofu Twisted cruller

Environmental pollution Faked edible oil, illegal secondary sale

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

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

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

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.

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

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

CONTENT 01 Background 02 Cold Patching Asphalt Mixture 03 Application 04 Conclusions

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.

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

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

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

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.

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

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.

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

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: 4.7-4.9%

Adhesion Test and Analysis Adhesion evaluation: water boiling test.

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

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

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.

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

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

Conclusion

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