ODOT_TM781_agg_loss~1.pdf
PDF 86 KB Posted
- Solicitation number
- S-73000-00013012
- Issued by
- Deschutes County, Oregon
About this file
This document is an ODOT (Oregon Department of Transportation) Provisional Method of Test (TM 781) for assessing loss of cover aggregate in emulsified asphalt surface treatments. The test method provides a standardized procedure for engineers to evaluate aggregate loss in a 12" x 12" square area, using specific testing apparatus including a tape measure, hand broom, and test aggregate meeting defined requirements (Flakiness Index ≤ 25, passing 3/8" sieve and retained on 1/4" sieve). The procedure involves identifying test locations, sweeping the area, marking a square, packing aggregate particles in areas of loss, counting the particles, and determining the degree of aggregate loss using a predefined table.
The document includes two critical tables: Table 1 quantifies the degree of loss based on the number of aggregate particles (ranging from 0-50 particles), and Table 2 provides assessment guidelines with corresponding actions. For aggregate loss degrees of 0-2, the recommendation is to accept the surface treatment. Losses between 3-6 require retesting 4-6 months before maintenance period end, while losses greater than 6 mandate remediation according to specific specification (SP00710.60(b)). The report must document the location and length of each sublot and partial sublot, along with the degree of stripping, providing a systematic approach to evaluating and maintaining road surface quality.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| ODOT_TM782_flakiness_index~1.pdf | ||
| ODOT_TM780_Sand_Circle~1.pdf | ||
| 00013012 Invitation to Bid.docx | DOCX document | |
| 00013012 Att A Revised Special Provisions V2.docx | DOCX document | |
| MP 67 Location that can be used..PNG | PNG image | |
| Health Benefits Actuary RFP 2025 QA Addendum.pdf | ||
| 00013012_Att C_Bid Pricing Form.xlsx | XLSX spreadsheet | |
| MP 87 Stock Pile.PNG | PNG image | |
| 00013012 Prelim Bid Results.xlsx | XLSX spreadsheet | |
| 00013012 Addendum 4.docx | DOCX document | |
| 00013012 Att A Special Provisions.docx | DOCX document | |
| MP 35 Stock Pile.PNG | PNG image | |
| 00013012 Att C Revised Bid Pricing Form V2~1.xlsx | XLSX spreadsheet |
Show all 13
On GovTribe
Work with this file
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
ODOT Provisional TM 781
Provisional Method of Test for
LOSS OF COVER AGGREGATE
SCOPE
This test method describes a procedure to determine the degree of aggregate loss in an emulsified asphalt surface treatment. If loss of cover aggregate is suspected in any area, the Engineer may perform this provisional test method to verify.
APPARATUS
1. Tape measure and chalk/crayon or template to define a 12” x 12” square.
2. Hand broom.
3. Test aggregate meeting the following requirements:
• Flakiness Index must be less than or equal to 25 according to ODOT Provision Test
Method 782
• Must pass the 3/8” sieve and be retained on the ¼” sieve
PROCEDURE
1. Identify test location. Sweep the test area using a hand broom.
2. Mark out a 12” x 12” square at the test location using a template or tape measure and chalk/crayon.
3. Pack aggregate particles in the areas where aggregate loss has exposed binder within the boundary of the 12” x 12” square. The aggregate should neatly fill the spaces left by the stripped aggregate.
4. Remove and count the number of aggregate particles packed in the 12” x 12” square
5. Determine the degree of loss of cover aggregate for the area from Table 1 and record the result.
6. Repeat for each location where loss of cover aggregate is suspected by the Engineer.
Table 1 - Determination of the Degree of Loss of Cover Aggregate
Number of aggregate Particles Required to Cover Aggregate Loss within the 12" X 12" Square
Degree of Loss of 3/8" Cover Aggregate
0 to 5 1
6 to 10 2 11 to 15 3 16 to 20 4 21 to 25 6 26 to 30 7 31 to 35 8 36 to 40 9 41 to 45 10 46 to 50 11
Table 2 - Assessment of the Degree of Loss of Cover Aggregate
Degree of Loss of Cover Aggregate Action Required
0 to 2 Accept
3 to 6 Retest and reassess 4 to 6 months before the end of the maintenance period.
Greater than 6 Remedy required according to SP00710.60(b).
REPORT
• The location and length of each sublot and partial sublot
• The degree of stripping for each sublot and partial sublot
This test method describes a procedure to determine the degree of aggregate loss in an emulsified asphalt surface treatment. If loss of cover aggregate is suspected in any area, the Engineer may perform this provisional test method to verify.
File details come from the government source that posted it. Updated .