Fecha registrada: February 09 2012

Duration: 01 hours 14 minutes 49 seconds

The characterization of soils and sediments for size and shape properties has a long and well-established history going back to the late 1800's. We will look at some important application areas such as erosion, abrasion, and sediment deposition.
Table of contents
1. Size and shape characterization in soils and sediments
01:50
2. Size and shape characterization in soils and sediments
00:50
3. Format
01:08
4. Abstract
01:27
5. Obligatory opening quotation
00:58
6. Pretty picture (Lyon et al 1915)
00:59
7. And we do need something on a Malvern soil
01:16
8. It’s all about the soil particle(s)
00:55
9. Lyon (1915) et al
01:37
10. Heywood & Scarlett
01:03
11. Scarlett and Heywood (and Bark on LHS)
00:25
12. What are (some of) those properties?
01:37
13. Sediments - erosion etc Hjulstrom, Filip 1935. Studies of the morphological activity of rivers as illustrated by the River Fyris. Bull. Geol. Inst. Uppsala, 25 Picture taken in 1957
01:28
14. Blatt et al
00:59
15. Many forms http://geology.uprm.edu:80/Morelock/4_image/hjuls.gif
00:28
16. Nitrate control - Poland
00:41
17. Grain size in sediments
00:54
18. Why?
00:28
19. Characterization of sediment type
00:42
20. Lyon/Fippin/Buckman - 1915
00:35
21. From: Blatt et al
01:07
22. How?
00:50
23. Sieving - a common question
00:34
24. Sieving - a common question
01:30
25. This particle will also pass the screen
01:07
26. Maximum dimension of a unit cube
00:56
27. Sieving - a common question
01:40
28. Sieving
00:43
29. Sedimentation
00:35
30. Settling rate
00:47
31. (George Gabriel) Stokes’ Law
02:43
32. Calculated settling times from Perry’s Chemical Engineering p 937 (1950)
01:51
33. Sedimentation
00:30
34. Age of sediments in lakes and on the sea bed
00:57
35. Sedimentation Precision
00:48
36. Laser diffraction Why now the dominant method for analysis?
01:39
37. PSA Conference quote
00:46
38. Testimonials
00:56
39. Laser diffraction - principle of measurement
01:18
40. Size distribution – Malvern Hills
01:33
41. Lunar simulant - size distribution - wet and dry See: http://isru.msfc.nasa.gov/lib/Documents/particlesize/LHT-1M/Malvern/Size/LHT-1Msize_Malvern2102_Report.pdf
00:49
42. The shape distribution
00:37
43. Shape distribution
00:23
44. Wm. Mackie ”On the laws that govern the rounding of grains of sand” Transactions of the Edinburgh Geological Society 7(3), 298-311, (1897) April 28th 1856 - July 15th 1932 Place of Birth: Loanends of Durno, Chapel of Garioch, Aberdeenshire
01:07
45. Krumbein, 1941
00:54
46. Krumbein, 1941
00:36
47. Krumbein, 1941
01:27
48. Krumbein, 1941
00:29
49. Krumbein, 1938 Surface texture, S
00:51
50. W C Krumbein & F J Pettijohn Manual of Sedimentary Petrography (1938) Chapter 12 “Surface textures of sedimentary fragments and particles” pp 303-308 5½ pages only Chapter 11 is “Shape and Roundness” (recommended for history)
01:00
51. W C Krumbein & F J Pettijohn Manual of Sedimentary Petrography (1938) Chapter 12 “Surface textures of sedimentary fragments and particles”
00:26
52. Calculated relationships of critical erosion velocity to void ratio for particles and aggregates with given grain size Modified after Axelsson 1992 (UNGI Rapport Nr 81)
00:23
53. Sample preparation
01:33
54. Sampling - segregation
00:59
55. Glacial moraine - sampling rules
00:56
56. Minimum Mass (based on Gy statistics)
01:20
57. Best Fundamental Sampling Error (FSE)
01:59
58. Sampling
00:38
59. Method development - general
01:20
60. General rules
00:35
61. Rationale of dispersion
00:44
62. Preparation of a stable suspension
01:51
63. Pre-treatment(s)
00:15
64. Pre-treatment(s)
00:36
65. Pre-treatment(s)
00:13
66. Stabilizer
00:58
67. CeO2
01:09
68. Stability studies with Zeta3000HS plus titrator
01:10
69. Soils/sediments checklist
00:44
70. The Benefits of the Mastersizer series for soils/sediments particle size analysis
00:51
71. The Benefits of the Mastersizer series for soils/sediments analysis
00:29
72. Custom reports
00:35
73. Reference list
00:22
74. Reference List
00:28
75. References
00:11
76. References
00:12
77. References
00:09
78. Soils in Malvern/Hereford & Worcestershire
00:19
79. Thank you!
00:27
80. Contact Information
01:34