| 00:00:00 | Size and shape characterization in soils and sediments |
| 00:01:50 | Size and shape characterization in soils and sediments |
| 00:02:40 | Format |
| 00:03:48 | Abstract |
| 00:05:15 | Obligatory opening quotation |
| 00:06:13 | Pretty picture (Lyon et al 1915) |
| 00:07:12 | And we do need something on a Malvern soil |
| 00:08:28 | It’s all about the soil particle(s) |
| 00:09:23 | Lyon (1915) et al |
| 00:11:00 | Heywood & Scarlett |
| 00:12:03 | Scarlett and Heywood (and Bark on LHS) |
| 00:12:28 | What are (some of) those properties? |
| 00:14:05 | 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 |
| 00:15:33 | Blatt et al |
| 00:16:32 | Many forms http://geology.uprm.edu:80/Morelock/4_image/hjuls.gif |
| 00:17:00 | Nitrate control - Poland |
| 00:17:41 | Grain size in sediments |
| 00:18:35 | Why? |
| 00:19:03 | Characterization of sediment type |
| 00:19:45 | Lyon/Fippin/Buckman - 1915 |
| 00:20:20 | From: Blatt et al |
| 00:21:27 | How? |
| 00:22:17 | Sieving - a common question |
| 00:22:51 | Sieving - a common question |
| 00:24:21 | This particle will also pass the screen |
| 00:25:28 | Maximum dimension of a unit cube |
| 00:26:24 | Sieving - a common question |
| 00:28:04 | Sieving |
| 00:28:47 | Sedimentation |
| 00:29:22 | Settling rate |
| 00:30:09 | (George Gabriel) Stokes’ Law |
| 00:32:52 | Calculated settling times from Perry’s Chemical Engineering p 937 (1950) |
| 00:34:43 | Sedimentation |
| 00:35:13 | Age of sediments in lakes and on the sea bed |
| 00:36:10 | Sedimentation Precision |
| 00:36:58 | Laser diffraction Why now the dominant method for analysis? |
| 00:38:37 | PSA Conference quote |
| 00:39:23 | Testimonials |
| 00:40:19 | Laser diffraction - principle of measurement |
| 00:41:37 | Size distribution – Malvern Hills |
| 00:43:10 | 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 |
| 00:43:59 | The shape distribution |
| 00:44:36 | Shape distribution |
| 00:44:59 | 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 |
| 00:46:06 | Krumbein, 1941 |
| 00:47:00 | Krumbein, 1941 |
| 00:47:36 | Krumbein, 1941 |
| 00:49:03 | Krumbein, 1941 |
| 00:49:32 | Krumbein, 1938 Surface texture, S |
| 00:50:23 | 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) |
| 00:51:23 | W C Krumbein & F J Pettijohn Manual of Sedimentary Petrography (1938) Chapter 12 “Surface textures of sedimentary fragments and particles” |
| 00:51:49 | 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) |
| 00:52:12 | Sample preparation |
| 00:53:45 | Sampling - segregation |
| 00:54:44 | Glacial moraine - sampling rules |
| 00:55:40 | Minimum Mass (based on Gy statistics) |
| 00:57:00 | Best Fundamental Sampling Error (FSE) |
| 00:58:59 | Sampling |
| 00:59:37 | Method development - general |
| 01:00:57 | General rules |
| 01:01:32 | Rationale of dispersion |
| 01:02:16 | Preparation of a stable suspension |
| 01:04:07 | Pre-treatment(s) |
| 01:04:22 | Pre-treatment(s) |
| 01:04:58 | Pre-treatment(s) |
| 01:05:11 | Stabilizer |
| 01:06:09 | CeO2 |
| 01:07:18 | Stability studies with Zeta3000HS plus titrator |
| 01:08:28 | Soils/sediments checklist |
| 01:09:12 | The Benefits of the Mastersizer series for soils/sediments particle size analysis |
| 01:10:03 | The Benefits of the Mastersizer series for soils/sediments analysis |
| 01:10:32 | Custom reports |
| 01:11:07 | Reference list |
| 01:11:29 | Reference List |
| 01:11:57 | References |
| 01:12:08 | References |
| 01:12:20 | References |
| 01:12:29 | Soils in Malvern/Hereford & Worcestershire |
| 01:12:48 | Thank you! |
| 01:13:15 | Contact Information |
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.