HMA_Mix_Design_Submittal.docx
DOCX document 44 KB Posted
- Solicitation number
- ITB-TR0-6544
- Issued by
- King County, Spokane City, Washington
About this file
This is an HMA Mix Design Submittal form utilized by the City of Seattle, Washington for roadway construction projects involving hot-mix asphalt (HMA) paving operations. The document serves as a standardized submittal template for HMA paving contractors to provide detailed mix design information for city review and approval in accordance with WSDOT Standard Operating Procedure (SOP) 732 "Volumetric Design for Hot-Mix Asphalt (HMA)." The form requires contractors to submit comprehensive technical data including project identification information, HMA class specifications (ranging from 3/8 inch to 1 inch sizes or other classifications), design ESALs, gyration levels, asphalt binder information for both primary and secondary suppliers, aggregate structure details with material sourcing and gradation requirements, and volumetric mix design data. The City of Seattle Materials Laboratory provides approval within 25 working days of receiving a complete mix design submittal, and contractors must certify that the job-mix formula (JMF) has been developed in accordance with WSDOT SOP 732 standards.
The submittal form requires detailed technical specifications including aggregate gradation percentages reported to the nearest tenth of a percent, specific gravity measurements, sand equivalency data with a minimum 45 percent requirement, coarse aggregate fracture specifications with 90 percent minimum on fractured faces across multiple sieve sizes, and flat and elongated particle limitations of 10 percent maximum. The HMA volumetric properties must demonstrate 4.0 percent air voids (Va) at Ndes design gyration levels for standard mixes or 7.0 percent for ATB (Asphalt Treated Base) classifications, with voids in mineral aggregate (VMA) and voids filled with asphalt (VFA) data required from replicate mixtures compacted to design gyration levels. Acceptable Gmm values at Nmax must not exceed 98.0 percent, and the final mix may contain up to 20 percent reclaimed asphalt pavement (RAP) by maximum weight. All contractors submitting asphalt materials under the City of Seattle's Roadway Construction Materials contract must comply with these HMA mix design requirements and provide 0.45 power charts demonstrating combined gradation against control points specific to the selected HMA class.
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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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