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Appendixes to NCHRP Report 555: Test Methods for Characterizing Aggregate Shape, Texture, and Angularity (2007) / Chapter Skim
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Pages 59-103

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From page 60...
... D-2 TEST METHODS FOR MEASURING AGGREGATE CHARACTERISTICS Kandhal et al.
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From page 61...
... D-3 Table D-1. Summary of Methods for Measuring Aggregate Characteristics Test References for the Test Method Direct (D)
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From page 62...
... D-4 Indirect Methods As defined earlier, indirect test methods are those methods in which particle characteristics are lumped together as geometric irregularities and determined based on measurements of bulk properties. In indirect methods, the shape, angularity, and texture are usually combined, as it is fairly difficult to separate the effect of the individual components.
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From page 63...
... D-5 Figure D-1. Uncompacted Void Content of Fine Aggregate Apparatus.
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From page 64...
... D-6 of the proposed fine aggregate sizes: 2.36 - 1.18 mm (sieve #8 - #16) and 0.6 - 0.3 mm (sieve #30 - #50)
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From page 65...
... D-7 Figure D-2. Uncompacted Void Content of Coarse Aggregate Apparatus.
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From page 66...
... D-8 This test was conducted at TTI. Method B of this test procedure was performed, where individual size fractions are tested.
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From page 67...
... D-9 Figure D-3. CAR Testing Machine.
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From page 68...
... D-10 The CAR test was conducted at TTI with some modifications to the procedure provided by Mr. David Jahn.
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From page 69...
... D-11 Table D-2 Fine Aggregate Blend Used in CAR Test Size Percentage 4.75 – 2.36 mm (sieve #4-#8) 40% 2.36 – 1.18 mm (sieve #8-#16)
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From page 70...
... D-12 Rugosity This method was first developed by Tons and Goetz (5) for coarse and fine aggregates.
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From page 71...
... D-13 Figure D-5. Schematic Description of the Pouring Device Used by Rugosity Test.
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From page 72...
... D-14 Figure D-7. Direct Shear Testing Machine.
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From page 73...
... D-15 Direct Methods These methods vary in the level of sophistication used to obtain direct information on aggregate shape. For example, the ASTM D 5821 procedure simply relies on visual inspection of aggregates, and ASTM D 4791 uses a mechanical device to classify aggregates according to the proportions of aggregate dimensions.
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From page 74...
... D-16 Figure D-8. Illustration of Counting Percent of Fractured Faces.
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From page 75...
... D-17 12.5 – 9.5 mm (1/2 - 3/8 inches)
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From page 76...
... D-18 Figure D-9. Flat and Elongated Coarse Aggregate Caliper.
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From page 77...
... D-19 * Multiple Ratio Shape Analysis (MRA)
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From page 78...
... D-20 Figure D-10. Improved Digital Multiple Ratio Analysis Device (MRA)
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From page 79...
... D-21 * VDG-40 Videograder VDG-40 Videograder was developed by the French public works laboratory (LCPC)
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From page 81...
... D-23 2-D projection. All analysis and data reporting are performed in a custom software package (8, 43)
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From page 83...
... D-25 Figure D-13. Micromeritics OptiSizer (PSDA)
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From page 84...
... D-26 * Buffalo Wire Works (PSSDA)
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From page 86...
... D-28 * Camsizer Two optically matched digital cameras comprise the heart of the Camsizer system as seen in Figure D-16(a)
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From page 88...
... D-30 * WipShape The system was developed by Dr.
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From page 89...
... D-31 Figure D-17. WipShape System .
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From page 91...
... D-33 This method was conducted at the University of Illinois. Particles are placed individually on the conveyer belt.
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From page 92...
... D-34 Figure D-19. Aggregate Imaging System (AIMS)
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From page 93...
... D-35 sizes (coarse and fine) and provide the following measures for aggregate shape: Sphericity (AIMSSPH)
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From page 94...
... D-36 Figure D-20. Laser-Based Aggregate Scanning System (LASS)
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From page 95...
... D-37 REFERENCES 1. Kandhal, P
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From page 96...
... D-38 7. Weingart, R
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From page 97...
... D-39 13. Kim, H., Haas, C., Rauch, A., and Browne, C
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From page 100...
... D-42 31. Masad, E
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From page 101...
... D-43 36. Kuo, C., and Freeman, R
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From page 102...
... D-44 42. Rao, C., and Tutumluer, E
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From page 103...
... D-45 47. Fletcher, T., Chandan, C., Masad, E., and Sivakumar, K
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