Materials 207: Troubleshooting Production Problems
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1 Materials 207: Troubleshooting Production Problems A Contractor s Perspective Rocky Mountain Asphalt Conference Feb. 25, 2011 Bob Ekstrom Quality Control Manager United Companies of Mesa County
2 Troubleshooting Asphalt Problems
3 Troubleshooting Asphalt Problems THE CONTRACTOR S PERSPECTIVE
4 Troubleshooting Asphalt Problems THE CONTRACTOR S PERSPECTIVE The best way to troubleshoot asphalt problems is to keep them from happening.
5 Troubleshooting Asphalt Problems THE CONTRACTOR S PERSPECTIVE The best way to troubleshoot asphalt problems is to keep them from happening.
6 Troubleshooting Asphalt Problems THE CONTRACTOR S PERSPECTIVE The best way to troubleshoot asphalt problems is to keep them from happening. Eliminating problems before they happen is more economical, maintains a better relationship with the customer and provides a better, more long lasting product.
7 Common Asphalt Problems
8 Common Asphalt Problems Crushing Problems Segregation Fluctuation in gradation
9 Common Asphalt Problems Crushing Problems Segregation Fluctuation in gradation Asphalt Plant Problems Fluctuating Gradation Segregation Fluctuating Binder Content
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14 Common Asphalt Problems
15 Common Asphalt Problems Transportation Problems Segregation Mix temperature fluctuation
16 Common Asphalt Problems Transportation Problems Segregation Mix temperature fluctuation Paver Problems Segregation Smoothness Bad Joints
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19 Common Asphalt Problems
20 Common Asphalt Problems Density and Smoothness Problems Density Inconsistent or low density caused by thermal or material segregation Density problems related to improper rolling practices Smoothness Temperature segregation can contribute to a smoothness problem Poor rolling practices will affect smoothness
21 Asphalt Continuing Education
22 Troubleshooting Asphalt
23 Troubleshooting Asphalt Public Works Policy of Jamaica
24 Troubleshooting Asphalt Public Works Policy of Jamaica
25 Troubleshooting Asphalt Public Works Policy of Jamaica No Problems only Situations
26 Troubleshooting Asphalt Public Works Policy of Jamaica No Problems only Situations
27 Troubleshooting Asphalt Public Works Policy of Jamaica No Problems only Situations There definitely were some situations with the road conditions in Jamaica
28 Troubleshooting Asphalt Situations
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30 Troubleshooting Asphalt Problems A system of good practices and cooperation throughout the entire paving process from aggregate crushing through asphalt production to the asphalt placement will minimize or eliminate asphalt problems.
31 Aggregate Production
32 Aggregate Production Crusher Control Proper Screen Settings Frequent checking of screens while crushing Maintain both quality of product and rate of production
33 Aggregate Production
34 Aggregate Production RAP Production Good crushing practices are essential
35 Aggregate Production RAP Production Good crushing practices are essential Stockpile Management Build stockpiles in layers
36 Aggregate Production RAP Production Good crushing practices are essential Stockpile Management Build stockpiles in layers Avoid comingling and contamination
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38 Asphalt Plant Operations
39 Asphalt Plant Operations Aggregates Proper stockpile management Keep bins from running out or running over Avoid comingling of materials
40 Asphalt Plant Operations Aggregates Proper stockpile management Keep bins from running out or running over Avoid comingling of materials Careful calibration of plant
41 Asphalt Plant Operations
42 Asphalt Plant Operations Asphalt cement (binder) Regular calibration of asphalt pump Maintenance of pumps and hot oil heating system
43 Asphalt Plant Operations Asphalt cement (binder) Regular calibration of asphalt pump Maintenance of pumps and hot oil heating system Baghouse fines Collection and metering of baghouse fines Regular maintenance and repair of baghouse and fines delivery system
44 Asphalt Plant Operations
45 Asphalt Plant Operations Silo Management Maintain proper level of material in silo Avoid loading trucks without enough mix in silo Regular maintenance of bin-top conveyors, gob hoppers and silo gates
46 Asphalt Plant Operations Silo Management Maintain proper level of material in silo Avoid loading trucks without enough mix in silo Regular maintenance of bin-top conveyors, gob hoppers and silo gates Truck Loadout Make sure truck beds have been cleaned out Practice multiple dump loading
47 Asphalt Paving Practices
48 Asphalt Paving Practices Match plant, paver and roller speed Avoid temperature segregation Avoid smoothness issues caused by starting and stopping
49 Asphalt Paving Practices Match plant, paver and roller speed Avoid temperature segregation Avoid smoothness issues caused by starting and stopping Pickup machine Proper size of windrow to match paver demand
50 Asphalt Paving Practices Match plant, paver and roller speed Avoid temperature segregation Avoid smoothness issues caused by starting and stopping Pickup machine Proper size of windrow to match paver demand End dump into paver hopper
51 Asphalt Laydown
52 Asphalt Laydown Maintain proper amount of material in the hopper
53 Asphalt Laydown Maintain proper amount of material in the hopper Match paving speed to the rate of asphalt delivery
54 Asphalt Laydown Maintain proper amount of material in the hopper Match paving speed to the rate of asphalt delivery Constant head of material at the augers
55 Asphalt Laydown Maintain proper amount of material in the hopper Match paving speed to the rate of asphalt delivery Constant head of material at the augers Augers moving almost constantly
56 Asphalt Laydown
57 Asphalt Laydown Proper angle of attack at the screed
58 Asphalt Laydown Proper angle of attack at the screed Proper use of skis and joint matchers
59 Asphalt Laydown Proper angle of attack at the screed Proper use of skis and joint matchers Rely on the screed automatics
60 Asphalt Compaction
61 Asphalt Compaction Match type, size and number of rollers to the project. Too large of rollers can be as detrimental to the project as rollers that are too small Pneumatic rollers can be beneficial to compaction (they are usually required) Some projects may require multiple rollers
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65 Asphalt Compaction
66 Asphalt Compaction Use the compaction test section to the benefit of everyone Establish and maintain a good rolling pattern Determine best compaction temperature for rolling Identify and avoid the tender zone
67 Troubleshooting Asphalt Problems
68 Troubleshooting Asphalt Problems Some asphalt problems are not a problem with the asphalt at all.
69 Troubleshooting Asphalt Problems Some asphalt problems are not a problem with the asphalt at all. Asphalt problems that are a problem with the asphalt are a breakdown of Best Practices in one or more areas of asphalt production and placement.
70 Troubleshooting Asphalt Problems Some asphalt problems are not a problem with the asphalt at all. Asphalt problems that are a problem with the asphalt are a breakdown of Best Practices in one or more areas of asphalt production and placement. All asphalt problems can be solved through cooperation by all the involved parties.
71 Troubleshooting Asphalt Problems
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73 Troubleshooting Asphalt Problems QUESTIONS??
Trouble-Shooting Asphalt Content Problems
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