The U.S. Department of Transportation Federal Highway Administration's Form FHWA 1622, known as the Worksheet for a Marshall Mix Design, is an essential document used in the planning and execution of federal lands highway projects. This comprehensive form serves a pivotal role in ensuring the quality and durability of asphalt mixtures, encompassing a wide range of details required for a successful Marshall Mix Design. It includes sections on project information, contractor details, and an extensive summary of the proposed job-mix-formula, covering aspects such as percent asphalt by mass, air voids, voids in mineral aggregate, and maximum specific gravity, among others. Furthermore, it delves into gradation target values, specific gravity, absorption allowable deviations, and trial results pertinent to the aggregate and asphalt binder utilized in the mix. Essential for maintaining standards, the form also requests information on the blend ratio of different stockpiles, aggregate properties like LA Abrasion and Sodium Sulfate Soundness, and results from moisture susceptibility tests to evaluate the mix’s performance under varied conditions. Designed to guide contractors and engineers alike, Form FHWA 1622 embodies the meticulous planning and evaluation needed to pave the way for enduring, high-quality roadways.
| Question | Answer |
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| Form Name | Form Fhwa 1622 |
| Form Length | 5 pages |
| Fillable? | No |
| Fillable fields | 0 |
| Avg. time to fill out | 1 min 15 sec |
| Other names | aashto t245 download, aashto t245 pdf, AASHTO, Pbe |
U.S. Department of Transportation
Federal Highway Administration
Federal Lands Highway
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WORKSHEET FOR A MARSHALL MIX DESIGN |
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AASHTO T 245 |
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Project: |
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Date: |
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Contractor: |
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Class & Grading of mixture: |
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Asphalt supplier: |
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Grade of asphalt: |
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Sources for: |
Aggregates: |
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Mineral filler: |
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Testing laboratory name: |
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Phone: |
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Testing performed by: |
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Testing reported by: |
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English |
Metric |
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SUMMARY OF THE PROPOSED |
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1.Percent asphalt by mass of total mix1, (Pb)
2.Air voids (Va)
3.Voids in mineral aggregate (VMA)
4.Maximum specific gravity (Gmm )
5.Recommended plant mixing temperature,
(Attach Temperature Viscosity Curve)
6.Effective specific gravity of aggregate (Gse)
7.Marshall stability,
8.Marshall flow,
Gradation Designation:
9.Specific gravity of binder (Gb)
10. Specific gravity of mineral filler
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12. Moisture susceptibility test results: 2 a. Dry strength, b. Wet strength, c. Index of retained strength, %
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GRADATION TARGET VALUES AND |
SPECIFIC GRAVITY AND ABSORPTION |
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ALLOWABLE DEVIATIONS |
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Job Mix |
Target Value |
Allowable |
Fine |
Coarse |
Combined |
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Sieve Sizes |
Formula |
Specification |
Deviation4 |
Aggregate |
Aggregate |
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Aggregate |
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Target Value 3 |
Range % |
% |
(AASHTO T 84) |
(AASHTO T 85) |
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Bulk SG (Gsb )
Bulk SSD SG
Apparent SG (Gsb)
Absorption |
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1Establish asphalt cement content (percent by mass of mix) to the nearest 0.01 percent.
2See contract for moisture susceptibility test method: AASTHO T 165/T 167 or AASTHO T 283.
3 Establish target values to the nearest 0.1 percent as a part of the job mix formula. 4 Allowable deviations plus or minus from established target values.
Form FHWA 1622 (Rev |
Page 1 of 5 |
WORKSHEET FOR A MARSHALL MIX DESIGN (Continued)
Material |
Stockpile Description |
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Blend Ratio |
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Stockpile |
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A |
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B |
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% |
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C |
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% |
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D |
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% |
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E |
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% |
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Total |
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% |
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Stockpile Gradation |
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Sieve
Size
Stockpile
A
%
Stockpile
B
%
Stockpile
C
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Stockpile
D
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Stockpile |
Blended |
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E |
Stockpile |
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% |
Gradation |
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Job Mix
Formula
Target Values
Specification
Limits
Aggregate Properties
Property |
Result |
Specification |
Property |
Result |
Specification |
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LA Abrasion, % - Grading |
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Fractured Faces, % - |
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AASHTO T 96 |
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ASTM D 5821 |
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Sodium Sulfate Soundness, % |
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Sand Equivalent |
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AASHTO T 176, Alt method |
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AASHTO T 104 |
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#2, reference method |
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Durability index (Coarse) |
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Other: |
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AASHTO T 210 |
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Durability index (Fine) |
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Other: |
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AASHTO T 210 |
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Form FHWA 1622 (Rev |
Page 2 of 5 |
WORKSHEET FOR A MARSHALL MIX DESIGN (Continued)
Trial Number |
1 |
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2 |
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3 |
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% Asphalt by mass of total mix, (Pb) |
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Effective Binder Content (Pbe) |
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Specimen height, |
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Marshall Stability, |
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Marshall Flow, |
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Bulk specific gravity, (Gmb) |
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Bulk unit mass, |
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Max. specific gravity, (Gmm ) |
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% Air voids, (Va) |
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% Voids in mineral aggregate, (VMA) |
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Average Marshall Stability value, |
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Average Marshall Flow value, |
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Average % Air voids, (Va) |
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Average % Voids in mineral aggregate, (VMA) |
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Trial Number |
4 |
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5 |
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6 |
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% Asphalt by mass of total mix, (Pb) |
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Effective Binder Content (Pbe) |
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Specimen height, |
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Marshall Stability, |
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Marshall Flow, |
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Bulk specific gravity, (Gmb) |
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Bulk unit mass, |
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Max. specific gravity, (Gmm ) |
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% Air voids, (Va) |
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% Voids in mineral aggregate, (VMA) |
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Average Marshall Stability value, |
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Average Marshall Flow value, |
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Average % Air voids, (Va) |
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Average Voids in mineral aggregate, (VMA) |
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Test Results for Each of the Individual Moisture Susceptibility Test Specimens |
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Percent asphalt binder: |
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AASHTO T 165/T 167 |
AASHTO T 283 |
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Specimen Dia: |
6 inch |
4 inch |
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Antistrip, type, amount: |
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Freeze cycle: |
Yes |
No |
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Sample I.D. |
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Average |
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Height |
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Dry |
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Wet |
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Bulk Specific |
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Dry |
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Gravity |
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Wet |
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Air |
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Dry |
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Voids |
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Wet |
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Dry |
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Strength |
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Wet |
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Retained Strength, % |
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Form FHWA 1622 |
Page 3 of 5 |
WORKSHEET FOR A HVEEM MIX DESIGN (Continued)
Design Curves for Proposed Job Mix Formula (JMF)
AIR VOIDS (Va) |
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MARSHALL FLOW |
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% Air voids (Va )
% Asphalt binder (Pb)
% Asphalt binder (Pb)
MARSHALL STABILITY |
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VMA |
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Voids in mineral aggregate
% Asphalt binder (Pb) |
% Asphalt binder (Pb) |
Form FHWA 1622 (Rev |
Page 4 of 5 |
U.S. Department of Transportation
Federal Highway Administration
Federal Lands Highway
RECLAIMED ASPHALT PAVEMENT (RAP) DATA SHEET
Location: |
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Sampled by: |
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Tested by: |
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Date: _____________________ |
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RAP 1 |
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RAP 2 |
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% of RAP in Mixture |
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Dry |
T 308 |
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Dry |
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T 308 |
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Sieve Size |
Burned |
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Gradation |
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Gradation |
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Burned |
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Gradation |
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Gradation |
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AC by % mix, Pb
Specific Gravity |
Specific Gravity |
Gmm
Gse
Gse = (100 – Pb)/(10/Gmm – Pb/Gb)
Gsb
Gsb = Gse/(((Pba*Gse)/(100*Gb)) + 1)
Pba = (assumed)
Gb = (assumed)
Remarks:
Form FHWA 1622 (Rev |
Page 5 of 5 |