HMA_Mix_Design_Submittal.docx
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- Solicitation number
- ITB# TR0-6850
- Issued by
- King County, Spokane City, Washington
About this file
This is an HMA (Hot-Mix Asphalt) Mix Design Submittal form used by the City of Seattle for roadway construction projects involving asphalt paving. The document serves as the official submission template for contractors to provide detailed specifications and test data for asphalt mix designs in compliance with Washington State Department of Transportation (WSDOT) Standard Operating Procedure (SOP) 732. The form requires contractors to document project identification information (PW number, project name, date, project manager, supervising resident engineer, general contractor, and HMA paving contractor), specify the HMA class (3/8 inch, 1/2 inch, 3/4 inch, 1 inch, or ATB), and provide design ESALs (Equivalent Single Axle Loads) with corresponding gyration levels. Contractors must submit detailed asphalt binder information for both primary and secondary suppliers, including specific gravity, grade, temperature ranges, and anti-strip type, along with temperature-viscosity curves. The City requires a response and review within 25 working days after receiving a complete mix design submittal at the SPU Materials Laboratory in Seattle.
The submittal requires comprehensive aggregate structure data showing material identification, source, ratio percentages, and gradation information across all sieve sizes, along with a 0.45 power chart illustrating the combined gradation with control points. Aggregate test data must include specific gravity measurements, sand equivalency, uncompacted void content, coarse aggregate fracture percentages (90 percent minimum for most sieve sizes), and flat and elongated particle percentages (10 percent maximum). The HMA mix design data section demands volumetric properties (Va, VMA, VFA, and Gmm) determined from replicate mixtures compacted to the appropriate Ndesign gyration level, with specifications requiring 96.0 percent Gmm at Ndesign (93 percent for ATB), a dust/asphalt ratio between 0.6 and 1.6, and maximum 20 percent RAP (Reclaimed Asphalt Pavement) content. Contractors must certify compliance with WSDOT SOP 732 and verify the job-mix formula through replicate testing at three binder content levels: design binder content, 0.5 percent below, and 0.5 percent above design content.
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Text version
HMA Mix Design Submittal
Contract Information
| PW Number: |
| Project Name: |
| Date: |
| Project Manager: |
| Supervising Resident Engineer: |
| General Contractor: |
| HMA Paving Contractor: |
| Contractors Mix ID: | ||
| HMA Class: | ||
| |_| 3/8 Inch | |_| 3/4 Inch | |_| ATB |
| |_| 1/2 Inch | |_| 1 Inch | |_| Other (describe) |
| Design ESALs (millions): | ||
| Gyration Levels: | ||
| Nini = | Ndes = | Nmax = |
Asphalt Binder Information
| Primary Asphalt Binder Supplier: |
| Asphalt Binder Specific Gravity (Gb): |
| Asphalt Binder Grade: |
| Max. Binder Temp.: |
| Mixing Temp. Range: |
| Compaction Temp. Range: |
| Anti-strip Type: |
| Secondary Asphalt Binder Supplier: |
| Asphalt Binder Specific Gravity (Gb): |
| Asphalt Binder Grade: |
| Max. Binder Temp.: |
| Mixing Temp Range: |
| Compaction Temp. Range: |
| Anti-strip Type: |
Note: Attach asphalt binder Temperature – Viscosity curves to submittal forms.
Aggregate Structure
In the table below, provide the “Material” identification (3/4”-0, RAP, etc.), “Source” (J-199, E-320, etc.), “Ratio” (45%, 20%, etc.), and the percent passing each sieve for each stockpile used in the mix design as well as the combined gradation and the specification requirements for the class of HMA used. Report all stockpile gradations to the nearest tenth of a percent. Report the combined gradation to the nearest whole percent except the U.S. No. 200, which must be reported to the nearest tenth of a percent. Attach a 0.45 power chart showing the combined gradation with control points for the class of mix submitted.
Material
| Combined Gradation |
| Specification Requirements |
Source
Ratio
1-1/2” Square
1” Square
3/4” Square
1/2" Square
3/8” Square
U.S. No. 4
U.S. No. 8
U.S. No. 16
U.S. No. 30
U.S. No. 50
U.S. No. 100
U.S. No. 200
Aggregate Test Data
In the tables below provide all of the aggregate specific gravity and aggregate quality property test data determined for each stockpile and the selected design aggregate structure (Combined Gradation) as required. The specification requirements only apply to the design aggregate structure (Combined Gradation).
Aggregate Specific Gravity, Sand Equivalency, and Uncompacted Void Content of Fine Aggregate
Material
| Combined Gradation |
| Specification Requirements |
Source
Ratio
Gsb Coarse
Gsb Fine
Gsb Blend
Sand Equiv.
45 min.
Uncompacted Void Content
45% Min.
Coarse Aggregate Fracture (not applicable to ATB)
| Sieve Sizes | |
| |_| 1 Sided Fracture | |_| 2 Sided Fracture |
| Combined Gradation | |
| %Fractured Faces | |
| Specification Requirements |
1” Square
90% Min.
3/4” Square
90% Min.
1/2" Square
90% Min.
3/8” Square
90% Min.
U.S. No. 4
90% Min.
Flat and Elongated Particles (not applicable to ATB)
| Sieve Sizes |
| Ratio is 5:1. |
| % Flat and Elongated |
| Specification Requirements |
1” Square
10% Max.
3/4” Square
10% Max.
1/2" Square
10% Max.
3/8” Square
10% Max.
U.S. No. 4
10% Max.
Binder Content of RAP (%):
Remarks:
HMA Mix Design Data
In the Table below, provide the HMA volumetric mix design data determined by performing WSDOT SOP 732. The Va, VMA, VFA, and Gmb values must be determined from replicate mixtures compactd to the appropriate N design gyration level in accordance to Section 8.2 of SOP 732, back calculated values from replicate mixtures compacted to Nmax are not acceptable.
| HMA Properties |
| Primary Asphalt Binder |
| Secondary Asphalt Binder |
| -0.5% Pb Design |
| Pb Design |
| +0.5% Pb Design |
| -0.5% Pb Design |
| Pb Design |
| +0.5% Pb Design |
Pb
% Gmm @ Nini
% Gmm @ Ndes (Va)
%VMA @ Ndes
%VFA @ Ndes
Dust / Asphalt Ratio
Pbe
Gmm
Gmb
Gse
Height @ Nini
Height @ Ndes
HMA Mix Design Proposal(s)
In the Table below, provide the HMA volumetric mix design data that comes closest to, or intersects 4.0% Va (7% for ATB), from the testing performed via WSDOT SOP 732. This may be the same as the Pb design data from the table above. Also provide the % Gmm data developed from the replicate mixture compacted to the appropriate Nmax gyration level.
| HMA Properties |
| Primary Asphalt Binder Proposal |
| Secondary Asphalt Binder Proposal |
| Specification Requirements |
Pb
% Gmm @ Nini
% Gmm @ Ndes (Va)
96.0 (93 for ATB)
%VMA @ Ndes
%VFA @ Ndes
% Va @ Ndes
Dust / Asphalt Ratio
0.6 – 1.6
Pbe
Gmm
Gmb
Gse
% Gmm @ Nmax
98.0 Max (ATB excluded)
% RAP in Final Mix
20 Max.
I certify this HMA job-mix formula (JMF) has been developed in accordance to WSDOT Standard Operating Procedure (SOP) 732 “Volumetric Design for Hot-Mix Asphalt (HMA)”. The HMA JMF has been verified in accordance to section 10 of SOP 732 which consists of preparing replicate mixtures containing the selected design aggregate structure at each of the following binder contents: (1) the estimated design binder content, Pb (design); (2) 0.5 percent below Pb (design); 0.5 percent above Pb (design). I am aware, in accordance to City of Seattle Standard Specification 5-04.3(6)C1, that a response will be provided within 25 Working Days after a complete mix design submittal has been received at the SPU Materials Laboratory in Seattle.
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