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Marshall test

D
Davinderpal Singh

The document summarizes the results of a Marshall test conducted to determine the optimum asphalt content for an asphalt mix. The test involved two stages: specimen preparation and specimen testing. In specimen preparation, aggregates were graded, dried, and mixed with asphalt. Specimens were molded and prepared for testing. In specimen testing, specimens were tested for properties like stability, flow, density, air voids and voids filled with asphalt at different asphalt contents. Charts were created to analyze the test results. The optimum asphalt content was determined to be 4.8% based on the asphalt content corresponding to maximum stability and density and median air voids.

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MARSHALL TEST RESULTS IT IS CONDUCTED IN TWO STAGES SPECIMEN PREPARATION. SPECIMEN TESTING.
SAMPLE GRADED AND DRIED HEATING UP SAMPLE MIX WITH BITUMEN MOULDING SAMPLE READY FOR TESTING
SPECIMEN PREPARATION WE USED FULLERS FORMULA FOR GRADING AND PREPARED SPREADSHEET FOR THAT ALSO. WHERE p is PERCENTAGE PASSING THROUGH SIEVE UNDER CONSIDERATION D is LARGEST PARTICLE SIZE d is SIEVE UNDER CONSIDERATION n is FULLER INDEX AND TAKEN as 0.45 by us.
SPECIMEN PHASE DIAGRAM
NOTATIONS W1, W2, W3 AND Wb ARE WEIGHT OF COARSE AGGREGATES, FINE AGGREGATES, FILLER AND BITUMEN RESPECTIVELY. V1, V2, V3, Vb AND Vv ARE VOLUME OF COARSE AGGREGATES, FINE AGGREGATES, FILLER, BITUMEN AND AIR VOIDS G1, G2, G3 AND Gb ARE SPECIFIC GRAVITIES OF COARSE AGGREGATES, FINE AGGREGATES, FILLER AND BITUMEN
FORMULAS USED Gt THEORETICAL SPECIFIC GRAVITY Gm BULK SPECIFIC GRAVITY Vv AIR VOIDS IN SAMPLE Vb VOIDS FILLED WITH BITUMEN VMA VOIDS IN MINERAL AGGREGATES VFB VOIDS FILLED BY BITUMEN
SPECIMEN TESTING ANIMATED REAL
TESTING DATA FOR OPTIMUM BITUMEN CONTENT Sample No. Bitumen Content (%) Marshall Stability Value (kg) Flow Value (in 0.25mm units) Bulk Specific Gravity Air Voids (%) VFB (%) 1) 4 1037.31 10 2.37 3.83 71.54 2) 4.5 1632.62 11 2.39 2.26 83.74 3) 5 2035.48 12 2.40 1.85 86.29 4) 5.5 2084.40 14 2.39 1.53 89.26 5) 6 1379.62 17 2.38 0.93 93.90
CHARTS MARSHALL STABILITY VS BITUMEN CONTENT
CHARTS FLOW VALUE VS BITUMEN CONTENT
CHARTS AIR VOIDS VS BITUMEN CONTENT
CHARTS BULK SPECIFIC GRAVITY VS BITUMEN CONTENT
CHARTS VFB VS BITUMEN CONTENT
OPTIMUM BITUMEN CONTENT BITUMEN CONTENT CORRESPONDING TO MAXIMUM MARSHALL STABILITY VALUE= 5.5% BITUMEN CONTENT CORRESPONDING TO MAXIMUM BULK SPECIFIC GRAVITY= 5% BITUMEN CONTENT CORRESPONDING TO MEDIAN (4%) OF AIR VOIDS %= 4% AVERAGE VALUE= 4.8% THEREFORE OPTIMUM BITUMEN CONTENT= 4.8%
Engineering problems are under-defined, there are many solutions, good, bad and indifferent. The art is to arrive at a good solution. This is a creative activity, involving imagination, intuition and deliberate choice. OVE ARUP Engineers are not superhuman. They make mistakes in their assumptions, in their calculations, in their conclusions. That they make mistakes is forgivable; that they catch them is imperative. Thus it is the essence of modern engineering not only to be able to check ones own work but also to have ones work checked and to be able to check the work of others.
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Marshall test

  • 1. MARSHALL TEST RESULTS IT IS CONDUCTED IN TWO STAGES SPECIMEN PREPARATION. SPECIMEN TESTING.
  • 2. SAMPLE GRADED AND DRIED HEATING UP SAMPLE MIX WITH BITUMEN MOULDING SAMPLE READY FOR TESTING
  • 3. SPECIMEN PREPARATION WE USED FULLERS FORMULA FOR GRADING AND PREPARED SPREADSHEET FOR THAT ALSO. WHERE p is PERCENTAGE PASSING THROUGH SIEVE UNDER CONSIDERATION D is LARGEST PARTICLE SIZE d is SIEVE UNDER CONSIDERATION n is FULLER INDEX AND TAKEN as 0.45 by us.
  • 5. NOTATIONS W1, W2, W3 AND Wb ARE WEIGHT OF COARSE AGGREGATES, FINE AGGREGATES, FILLER AND BITUMEN RESPECTIVELY. V1, V2, V3, Vb AND Vv ARE VOLUME OF COARSE AGGREGATES, FINE AGGREGATES, FILLER, BITUMEN AND AIR VOIDS G1, G2, G3 AND Gb ARE SPECIFIC GRAVITIES OF COARSE AGGREGATES, FINE AGGREGATES, FILLER AND BITUMEN
  • 6. FORMULAS USED Gt THEORETICAL SPECIFIC GRAVITY Gm BULK SPECIFIC GRAVITY Vv AIR VOIDS IN SAMPLE Vb VOIDS FILLED WITH BITUMEN VMA VOIDS IN MINERAL AGGREGATES VFB VOIDS FILLED BY BITUMEN
  • 8. TESTING DATA FOR OPTIMUM BITUMEN CONTENT Sample No. Bitumen Content (%) Marshall Stability Value (kg) Flow Value (in 0.25mm units) Bulk Specific Gravity Air Voids (%) VFB (%) 1) 4 1037.31 10 2.37 3.83 71.54 2) 4.5 1632.62 11 2.39 2.26 83.74 3) 5 2035.48 12 2.40 1.85 86.29 4) 5.5 2084.40 14 2.39 1.53 89.26 5) 6 1379.62 17 2.38 0.93 93.90
  • 9. CHARTS MARSHALL STABILITY VS BITUMEN CONTENT
  • 10. CHARTS FLOW VALUE VS BITUMEN CONTENT
  • 11. CHARTS AIR VOIDS VS BITUMEN CONTENT
  • 12. CHARTS BULK SPECIFIC GRAVITY VS BITUMEN CONTENT
  • 13. CHARTS VFB VS BITUMEN CONTENT
  • 14. OPTIMUM BITUMEN CONTENT BITUMEN CONTENT CORRESPONDING TO MAXIMUM MARSHALL STABILITY VALUE= 5.5% BITUMEN CONTENT CORRESPONDING TO MAXIMUM BULK SPECIFIC GRAVITY= 5% BITUMEN CONTENT CORRESPONDING TO MEDIAN (4%) OF AIR VOIDS %= 4% AVERAGE VALUE= 4.8% THEREFORE OPTIMUM BITUMEN CONTENT= 4.8%
  • 15. Engineering problems are under-defined, there are many solutions, good, bad and indifferent. The art is to arrive at a good solution. This is a creative activity, involving imagination, intuition and deliberate choice. OVE ARUP Engineers are not superhuman. They make mistakes in their assumptions, in their calculations, in their conclusions. That they make mistakes is forgivable; that they catch them is imperative. Thus it is the essence of modern engineering not only to be able to check ones own work but also to have ones work checked and to be able to check the work of others.