Form Fhwa 1641 PDF Details

In the realm of infrastructure development and maintenance, the integration of robust materials and meticulous planning plays a pivotal role in ensuring the longevity and sustainability of road surfaces. The Federal Highway Administration (FHWA), a division of the U.S. Department of Transportation, recognizes the critical importance of selecting and testing materials for Superpave asphalt concrete mix designs, instrumental in paving safer and more durable roads. The FHWA 1641 form, developed for this exact purpose, serves as a comprehensive worksheet guiding engineers and contractors through the intricate process of Superpave mix design for federal lands highways. This detailed form encompasses various critical aspects of mix design, including but not limited to, the selection and proportions of aggregates, binder specifications, target values for mix components, and the necessary laboratory tests to determine moisture susceptibility and other vital properties of the asphalt mix. Moreover, it meticulously records project details, contractor information, aggregate and asphalt suppliers, and the specifics of the job mix formula, aiming to standardize the mix design process and assure quality control across federal highway projects. By facilitating a uniform approach to asphalt mix design, the FHWA 1641 form plays a crucial role in enhancing road quality, safety, and performance on federal lands, contributing significantly to the infrastructure's enduring reliability.

QuestionAnswer
Form NameForm Fhwa 1641
Form Length5 pages
Fillable?No
Fillable fields0
Avg. time to fill out1 min 15 sec
Other names1641_v14 superpave bituminous concrete mix form

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U.S. Department of Transportation

Federal Highway Administration

Federal Lands Highway

WORKSHEET FOR SUPERPAVE ASPHALT CONCRETE MIX DESIGN

AASHTO R 35

Project:

 

 

 

 

 

Date:

 

 

 

Contractor:

 

 

 

 

Nominal Maximum Aggregate Size, :

 

 

 

 

 

 

 

 

 

 

 

 

 

Asphalt supplier:

 

 

Grade of asphalt:

 

 

Sources for:

Aggregates:

 

Mineral filler:

 

 

Testing laboratory name:

 

 

Phone:

 

 

Testing performed by:

 

 

 

 

 

 

 

 

 

 

 

Testing reported by:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

English

Metric

SUMMARY OF THE PROPOSED JOB-MIX-FORMULA

 

1.Number of gyrations (Nint,/ Ndes,/ Nmax)

2.Percent binder by mass of total mix (Pb)1

3.Percent binder by mass of aggregate

4.Air voids (Va) at Ndes

5.Voids in mineral aggregate (VMA) at Ndes

6.Voids filled with asphalt (VFA) at Ndes

7.Maximum unit mass (Gmm)

8.Effective specific gravity of aggregate (Gse)

9.Dust-to-Binder Ratio (DP)

10.Specific gravity of binder (Gb)

11.Recommended plant mixing temperature, (Attach Temperature Viscosity Curve)

12.Percent compaction at Nmax

13.Hveem stabilometer value (If specified)

14.Moisture Susceptibility:

a.Dry strength,

b.Wet strength,

c.Index of Retained Strength, %

 

GRADATION TARGET VALUES AND

SPECIFIC GRAVITY AND ABSORPTION

 

ALLOWABLE DEVIATIONS

 

 

 

 

 

 

 

 

 

 

 

Job Mix

Allowable

Fine

Coarse

Combined

Sieve Sizes

Formula

Deviation3

Aggregate

Aggregate

Aggregate

 

Target Value2

%

(AASHTO T 84)

(AASHTO T 85)

 

 

 

 

 

 

 

 

Bulk SG (Gsb )

Bulk SSD SG

Apparent SG (Gsb)

Absorption

 

%

 

%

 

%

1Establish asphalt cement content (percent by mass of mix) to the nearest 0.01 percent.

2 Establish target values to the nearest 0.1 percent as a part of the job mix formula. 3 Allowable deviations plus or minus from established target values.

Form FHWA 1641 (Rev 03-11)

Page 1 of 5

WORKSHEET FOR A SUPERPAVE MIX DESIGN (Continued)

Material

Stockpile Description

 

Blend Ratio

Stockpile

 

 

 

 

 

 

 

A

 

 

 

 

 

%

B

 

 

 

 

 

%

C

 

 

 

 

 

 

%

D

 

 

 

 

 

%

E

 

 

 

 

 

%

 

 

TOTAL

 

 

 

 

 

%

 

 

 

 

 

Stockpile Gradation

 

 

 

Sieve

Size

Stockpile

A

%

Stockpile

B

%

Stockpile

C

%

Stockpile

D

%

Stockpile

E

%

Blended

Stockpile

Gradation

Job Mix

Formula

Target Values

Specification

Limits

Aggregate Properties

Property

Result

Specification

LA Abrasion, % - Grading

AASHTO T 96

Sodium Sulfate Soundness, %

AASHTO T 104

Durability index (Coarse)

AASHTO T 210

Durability index (Fine)

AASHTO T 210

Fractured Faces, % -

ASTM D 5821

Property

 

 

 

Result

Specification

 

 

 

 

 

Fine aggregate angularity,

 

 

 

AASHTO T 304 - method A

 

 

 

 

 

 

 

 

Flat and elongated particles,

 

 

 

 

 

ASTM D 4791 - 1:

 

ratio

 

 

 

 

 

 

 

Sand Equivalent

 

 

 

 

 

AASHTO T 176, Alt method #2, reference method

Other:

Other:

Form FHWA 1641 (Rev 03-11)

Page 2 of 5

WORKSHEET FOR A SUPERPAVE MIX DESIGN (Continued)

TRIAL NUMBER

1

AVG

2

AVG

3

AVG

 

 

 

 

 

 

 

 

 

 

 

 

 

% Asphalt by mass of total mix (Pb)

 

 

 

 

 

 

 

 

 

 

Specimen height,

 

 

 

 

 

 

 

 

 

 

Effective Binder Content (Pbe)

 

 

 

 

 

 

 

 

 

 

Bulk specific gravity at Ndes (Gmb)

 

 

 

 

 

 

 

 

 

 

% compaction at Nint

 

 

 

 

 

 

 

 

 

 

% Air voids at Ndes (VA)

 

 

 

 

 

 

 

 

 

 

Max. unit mass Gmm

 

 

 

 

 

 

 

 

 

 

Voids in mineral aggregate (VMA) at Ndes

 

 

 

 

 

 

 

 

 

 

Voids filled with asphalt (VFA) at Ndes

 

 

 

 

 

 

 

 

 

 

Dust-to-Binder Ratio, (DP)

 

 

 

 

 

 

 

 

 

 

Hveem Stabilometer value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRIAL NUMBER

4

AVG

5

AVG

6

AVG

 

 

 

 

 

 

 

 

 

 

 

 

% Asphalt by mass of total mix (Pb)

 

 

 

 

 

 

 

 

 

 

Specimen height,

 

 

 

 

 

 

 

 

 

 

Effective Binder Content (Pbe)

 

 

 

 

 

 

 

 

 

 

Bulk specific gravity at Ndes (Gmb)

 

 

 

 

 

 

 

 

 

 

% compaction at Nint

 

 

 

 

 

 

 

 

 

 

% Air voids at Ndes (VA)

 

 

 

 

 

 

 

 

 

 

Max. unit mass Gmm

 

 

 

 

 

 

 

 

 

 

Voids in mineral aggregate (VMA) at Ndes

 

 

 

 

 

 

 

 

 

 

Voids filled with asphalt (VFA) at Ndes

 

 

 

 

 

 

 

 

 

 

Dust-to-Binder ratio, (DP)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hveem Stabilometer value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Results for Each of the Individual Moisture Susceptibility Test Specimens

 

Percent asphalt binder:

 

 

 

AASHTO T 283

 

 

 

 

 

 

 

 

 

 

 

Specimen Dia:

6 inch

4 inch

Antistrip, type, amount:

 

 

 

 

 

 

 

 

 

 

Freeze cycle:

Yes

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sample I.D.

 

 

 

 

 

 

 

 

 

 

Average

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Height

 

Dry

 

 

 

 

 

 

 

 

 

 

 

 

 

Wet

 

 

 

 

 

 

 

 

 

 

 

Bulk Specific

 

Dry

 

 

 

 

 

 

 

 

 

 

 

Gravity

 

Wet

 

 

 

 

 

 

 

 

 

 

 

Air

 

Dry

 

 

 

 

 

 

 

 

 

 

 

Voids

 

Wet

 

 

 

 

 

 

 

 

 

 

 

 

 

Dry

 

 

 

 

 

 

 

 

 

 

 

Strength

 

Wet

 

 

 

 

 

 

 

 

 

 

 

Retained Strength, %

 

 

 

Form FHWA 1641 (03-11)

Page 3 of 5

WORKSHEET FOR A SUPERPAVE MIX DESIGN (Continued)

Design Curves for Proposed Job Mix Formula (JMF)

AIR VOIDS (Va)

 

UNIT MASS

 

 

 

 

 

 

 

 

 

% Air voids (Va )

% Asphalt binder (Pb)

% Asphalt binder (Pb)

VFA

 

VMA

 

 

 

 

 

 

Voids filled with asphalt

 

 

Voids in mineral aggregate

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

% Asphalt binder (Pb)

% Asphalt binder (Pb)

Form FHWA 1641 (Rev 03-11)

Page 4 of 5

U.S. Department of Transportation

Federal Highway Administration

Federal Lands Highway

RECLAIMED ASPHALT PAVEMENT (RAP) DATA SHEET

Location:

 

 

 

 

 

Sampled by:

 

Tested by:

 

 

 

 

Date: _____________________

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RAP 1

 

 

RAP 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

% of RAP in Mixture

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dry

T 308

 

 

Dry

 

T 308

 

 

 

 

 

Sieve Size

Burned

 

 

 

 

 

 

 

 

 

Gradation

 

 

Gradation

 

Burned

 

 

 

 

 

 

Gradation

 

 

Gradation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 1641 (Rev 03-11)

Page 5 of 5