Presentation is loading. Please wait.

Presentation is loading. Please wait.

Marshall & Superpave Mix Design

Published byRoy Blankenship Modified over 8 years ago

Similar presentations

Presentation on theme: "Marshall & Superpave Mix Design"— Presentation transcript:

1 Marshall & Superpave Mix Design
Pavement Management CourseProfessor Training Course Russian Engineers Training March 2011Russian Engineers Training March 2011 Marshall & Superpave Mix Design Moisture Damage in Asphalt PavementsMoisture Damage in HMA Marshall & Superpave Mix DesignPhysical Properties of Aggregates 1

2 Objectives of Mix Design
Russian Engineers Training March 2011Russian Engineers Training March 2011 Objectives of Mix Design Evaluate materials Determine aggregate proportions Determine optimum asphalt content Evaluate design mix Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 2

3 Aggregate Evaluation Gradation Sulfate Soundness L A abrasion
Russian Engineers Training March 2011Russian Engineers Training March 2011 Aggregate Evaluation Gradation Sulfate Soundness L A abrasion Fractured faces Natural sand content Fine aggregate angularity Flat and elongated Clay particles Sand equivalency Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 3

4 Taking Samples and Splitting Samples
Russian Engineers Training March 2011Russian Engineers Training March 2011 Taking Samples and Splitting Samples Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 4

5 Sample Splitters are Typically Used
Russian Engineers Training March 2011Russian Engineers Training March 2011 Sample Splitters are Typically Used Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 5

6 Russian Engineers Training March 2011Russian Engineers Training March 2011
Types of Sampling Representative---average---several random samples added together Random---all possible sampling locations have an equal chance of being selected Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 6

7 Gradation / Sieve Analysis
Russian Engineers Training March 2011Russian Engineers Training March 2011 Gradation / Sieve Analysis ASTM D5444 Wet vs. dry gradation Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 7

8 Fractured Faces ASTM D5821 Only a problem with gravels
Russian Engineers Training March 2011Russian Engineers Training March 2011 Fractured Faces ASTM D5821 Only a problem with gravels Must make sure that gravel is properly crushed Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 8

9 Crushed Gravel Uncrushed Gravel
Russian Engineers Training March 2011Russian Engineers Training March 2011 Crushed Gravel Uncrushed Gravel Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 9

10 Fine Aggregate Angularity
Russian Engineers Training March 2011Russian Engineers Training March 2011 Fine Aggregate Angularity Used to measure angularity of fine aggregate Typically high 30’s or low 40’s for natural sand Typically mid 40’s to low 50’s for crushed fine aggregate Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 10

11 Most Common Aggregate Problems
Russian Engineers Training March 2011Russian Engineers Training March 2011 Most Common Aggregate Problems Excessive percentage passing No. 200 sieve Excessive natural sand Inadequately crushed gravel Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 11

12 Three Ways to Classify Asphalt Cement
Russian Engineers Training March 2011Russian Engineers Training March 2011 Three Ways to Classify Asphalt Cement Penetration Graded For example pen Viscosity Graded For example AC-20 Performance Graded For example PG 64-22 Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 12

13 Russian Engineers Training March 2011Russian Engineers Training March 2011
If aggregate properties and asphalt properties are ok then determine optimum asphalt content Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 13

14 Two Methods Generally Used to Determine Optimum Asphalt Content
Russian Engineers Training March 2011Russian Engineers Training March 2011 Two Methods Generally Used to Determine Optimum Asphalt Content Marshall Superpave Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 14

15 Marshall Method Developed by Corps of Engineers
Russian Engineers Training March 2011Russian Engineers Training March 2011 Marshall Method Developed by Corps of Engineers Simple, quick, inexpensive Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 15

16 Uses 4-inch diameter samples
Russian Engineers Training March 2011Russian Engineers Training March 2011 Uses 4-inch diameter samples Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 16

17 Blend 15 to 20 aggregate samples at selected proportions
Russian Engineers Training March 2011Russian Engineers Training March 2011 Blend 15 to 20 aggregate samples at selected proportions Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 17

18 Vary asphalt content in 0.5% increments
Russian Engineers Training March 2011Russian Engineers Training March 2011 Vary asphalt content in 0.5% increments Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 18

19 Russian Engineers Training March 2011Russian Engineers Training March 2011
Mixing of HMA Samples Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 19

20 Compact samples using specified effort
Russian Engineers Training March 2011Russian Engineers Training March 2011 Compact samples using specified effort Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 20

21 Three Types of Hammer Manual Mechanical
Russian Engineers Training March 2011Russian Engineers Training March 2011 Three Types of Hammer Manual Mechanical Mechanical with slanted foot and rotating base Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 21

22 Russian Engineers Training March 2011Russian Engineers Training March 2011
Manual Hammer Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 22

23 Russian Engineers Training March 2011Russian Engineers Training March 2011
Mechanical Hammer Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 23

24 Marshall Hammers Manual Mechanical Slanted foot on rotating base
Russian Engineers Training March 2011Russian Engineers Training March 2011 Marshall Hammers Manual Mechanical Slanted foot on rotating base On concrete slab Wood block in good condition Top plate tight on wood block Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 24

25 Compacting Samples & Removing From Molds
Russian Engineers Training March 2011Russian Engineers Training March 2011 Compacting Samples & Removing From Molds Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 25

26 Russian Engineers Training March 2011Russian Engineers Training March 2011
Removing Paper Disc Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 26

27 Identifying Compacted Samples
Russian Engineers Training March 2011Russian Engineers Training March 2011 Identifying Compacted Samples Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 27

28 Determining Bulk Density
Russian Engineers Training March 2011Russian Engineers Training March 2011 Determining Bulk Density Obtain mass of dry compacted sample The mass of the oven dry specimen is being determined in this photograph. The next step is to place the specimen in the water bath directly below the scale (not shown) and determine its mass under water. Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 28

29 Weighing Sample in Water
Russian Engineers Training March 2011Russian Engineers Training March 2011 Weighing Sample in Water Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 29

30 Blotting Sample to Determine SSD Weight
Russian Engineers Training March 2011Russian Engineers Training March 2011 Blotting Sample to Determine SSD Weight Obtain mass of specimen at SSD Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 30

31 Bulk Specific Gravity Sometimes samples absorb lots of water
Russian Engineers Training March 2011Russian Engineers Training March 2011 Bulk Specific Gravity Sometimes samples absorb lots of water Excessive absorption results in error in density measurement Excessive bubbling indicates excessive water absorption Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 31

32 CoreLok Specific Gravity for Porous Mixtures
Russian Engineers Training March 2011Russian Engineers Training March 2011 CoreLok Specific Gravity for Porous Mixtures Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 32

33 Determine the Following Properties and Plot Results
Russian Engineers Training March 2011Russian Engineers Training March 2011 Determine the Following Properties and Plot Results Unit Weight of Mixture Air Voids VMA Voids Filled Stability Flow Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 33

34 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 34

35 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 35

36 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 36

37 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 37

38 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 38

39 Typically select optimum asphalt content at 4 percent air voids
Russian Engineers Training March 2011Russian Engineers Training March 2011 Typically select optimum asphalt content at 4 percent air voids Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 39

40 Russian Engineers Training March 2011Russian Engineers Training March 2011
Design Air Voids If significantly greater than 4 percent, likely to have durability problems due to low asphalt content If significantly less then 4 percent, likely to have rutting problems due to too much asphalt in mix Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 40

41 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 41

42 Russian Engineers Training March 2011Russian Engineers Training March 2011
After selecting optimum asphalt content check for stability and moisture susceptibility Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 42

43 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 43

44 Marshall Stability and Flow
Russian Engineers Training March 2011Russian Engineers Training March 2011 Marshall Stability and Flow Conducted at 140 degrees F A rough measure of in-place stability and plastic flow Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 44

45 Moisture Susceptibility
Russian Engineers Training March 2011Russian Engineers Training March 2011 Moisture Susceptibility Measured on proposed aggregate blend and asphalt content 3 Conditioned Specimens 3 Unconditioned Specimens Tensile Strength Ratio (TSR) Minimum TSR required Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 45

46 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 46

47 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 47

48 Russian Engineers Training March 2011Russian Engineers Training March 2011
The mix design is a starting point and will likely have to be adjusted during production Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 48

49 Facts About Mix Design Increase in filler results in lower AC
Russian Engineers Training March 2011Russian Engineers Training March 2011 Facts About Mix Design Increase in filler results in lower AC Smaller Max agg size results in higher optimum AC content Manual hammer provides lower optimum AC content than mechanical if not calibrated Absorptive aggregate requires higher AC content Higher –200 results in higher marshall stability Reheating will significantly increase stability Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 49

50 Superpave is a mix design procedure and a binder classification system
Russian Engineers Training March 2011Russian Engineers Training March 2011 Superpave is a mix design procedure and a binder classification system Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 50

51 Russian Engineers Training March 2011Russian Engineers Training March 2011
What is Superpave? Hence, there is a need for a mechanical test which can tell us whether the designed mix is resistant to rutting. It should be able to proof test the mixes and tell us whether a mix satisfies a definite criteria and passes or fails the torture test. This test should be a laboratory test method so that it can be used on designed mixes, and it should be a simple test method so that it can be used routinely by the folks who actually build our pavements. Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 51

52 Superpave Method Developed in 1990’s
Russian Engineers Training March 2011Russian Engineers Training March 2011 Superpave Method Developed in 1990’s Involves using newly developed gyratory compactor Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 52

53 Superpave Gyratory Compactor
Russian Engineers Training March 2011Russian Engineers Training March 2011 Superpave Gyratory Compactor ? Basis Texas equipment French operational characteristics 150 mm diameter Up to 37.5 mm nominal size Height recordation Must control pressure (600 KPa), angle (1.25 degrees), and number of gyrations (depends on traffic) ? ? Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 53

54 Superpave Gyratory Compactor
Russian Engineers Training March 2011Russian Engineers Training March 2011 Superpave Gyratory Compactor Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 54

55 Placing Mold in Gyratory Compactor
Russian Engineers Training March 2011Russian Engineers Training March 2011 Placing Mold in Gyratory Compactor Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 55

56 Uses 6-inch diameter samples
Russian Engineers Training March 2011Russian Engineers Training March 2011 Uses 6-inch diameter samples Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 56

57 Russian Engineers Training March 2011Russian Engineers Training March 2011
Marshall & Superpave Mix Design Marshall & Superpave Mix DesignPhysical Properties of Aggregates 57

58 Differences Between Marshall and Superpave
Size of sample: 4 inches for Marshall and 6 inches for Superpave Compactor type: Hammer for Marshall and Gyratory compactor for Superpave Compactive effort: No. of blows with hammer for Marshall and number of gyrations for Superpave Moisture Damage in Asphalt Pavements Marshall & Superpave Mix Design

59 Russian Engineers Training March 2011Russian Engineers Training March 2011
Any Questions??? Marshall & Superpave Mix DesignPhysical Properties of Aggregates 59

Download ppt "Marshall & Superpave Mix Design"

Similar presentations

Kenneth Ray Hobson, P.E. – Bituminous Engineer

Kenneth Ray Hobson, P.E. – Bituminous Engineer
Objectives Be able to use basic volume weight equations

Objectives Be able to use basic volume weight equations
HMA permanent deformation study: Progress report to the RPF 7 May 2008 Erik Denneman.

HMA permanent deformation study: Progress report to the RPF 7 May 2008 Erik Denneman.
FAA Mix Design Presented by Christopher M. Brower

FAA Mix Design Presented by Christopher M. Brower
Asphalt Concrete Mix Design and Construction

Asphalt Concrete Mix Design and Construction
REVIEW FOR FINAL CONSTRUCTION MATERIALS: WOOD CONCRETE BITUMENS (ASPHALTS) MASONRY WHAT YOU NEED TO KNOW ?? QUALITY CONTROL ASTM SPECIFICATION MANUFACTURING.

REVIEW FOR FINAL CONSTRUCTION MATERIALS: WOOD CONCRETE BITUMENS (ASPHALTS) MASONRY WHAT YOU NEED TO KNOW ?? QUALITY CONTROL ASTM SPECIFICATION MANUFACTURING.
MODULE 4 ASPHALT MIX DESIGN*

MODULE 4 ASPHALT MIX DESIGN*
1Volumetric Analysis of HMA Mixtures VOLUMETRIC ANALYSIS OF HMA MIXTURES.

1Volumetric Analysis of HMA Mixtures VOLUMETRIC ANALYSIS OF HMA MIXTURES.
HMA Design (Surface) The surface course is the layer in contact with traffic loads and normally contains the highest quality materials. It provides characteristics.

HMA Design (Surface) The surface course is the layer in contact with traffic loads and normally contains the highest quality materials. It provides characteristics.
Aggregates Usually refers to a soil that has in some way been processed or sorted. Soils are materials that are used as-is. An example would be a finished.

Aggregates Usually refers to a soil that has in some way been processed or sorted. Soils are materials that are used as-is. An example would be a finished.
BASICS OF A GOOD ROAD ASPHALT AND AGGREGATES

BASICS OF A GOOD ROAD ASPHALT AND AGGREGATES
Test Result Relationships

Test Result Relationships
SMA Mixture Design Requirements

SMA Mixture Design Requirements
Asphalt Pavements and Materials

Asphalt Pavements and Materials
Materials for Civil and Construction Engineers

Materials for Civil and Construction Engineers
Aggregate Properties HMA

Aggregate Properties HMA
Asphalt Rubber Mixture Design ADOT’s AR-ACFC and ARAC.

Asphalt Rubber Mixture Design ADOT’s AR-ACFC and ARAC.
Asphalt Concrete Aggregates

Asphalt Concrete Aggregates
Bituminous Street Recertification Initiatives. Initiative Items n Stone Matrix Asphalt (SMA) n Longitudinal Joint Spec and other methods for longitudinal.

Bituminous Street Recertification Initiatives. Initiative Items n Stone Matrix Asphalt (SMA) n Longitudinal Joint Spec and other methods for longitudinal.
AGGREGATES There are two types of aggregates Coarse Aggregates

AGGREGATES There are two types of aggregates Coarse Aggregates

Similar presentations

Ads by Google