Pavement Maintenance - Cornell Local Roads Program - Cornell ...

Pavement Maintenance
“Throw and Roll” steps
1. Place the material into a pothole
(remove as much water and/or debris
as possible from the hole beforehand).
2. Compact the patch using truck tires,
as shown in figure 28.
3. Verify that the compacted patch has
some crown (1/4 inch above the
surrounding pavement).
4. Move on to the next pothole.
Cost effectiveness
Table 9 illustrates the effect of rolling the patch, and using modified mixes. Typically reported
survival rates are given for each technique. The price is the average from the NYS OGS. The
calculations are for 20 tons of cold patch. The productivity is 20 tons per day for Throw and Go
and 15 tons per day for Throw and Roll.
The total cost assumes that the failed potholes have to be refilled up to three times. Even with the
higher initial cost and slower production rate, Throw and Roll is more cost effective. The higher
survival rate of a proprietary mix can justify the extra initial expense.
Table 9 - Cost effectiveness of various demand patching methods
Method
Throw & Go
(standard
cold patch)
Throw and Roll
(standard cold
patch)
46 Cornell Local Roads Program
Figure 28 – 'Rolling' a cold mix patch
Throw & Roll
(proprietary
cold patch)
Price ($/ton) $45/ton $45/ton $72/ton
Materials $900 $900 $1,440
Labor $676 $901 $901
Equipment $200 $267 $267
Initial cost $1,776 $2,068 $2,608
Survival rate 10% 25% 50%
Total cost $4,813 $4,782 $4,564