Africa Grain size curve of sand making machine

Grain size mm Finer by weight Sand Gravel fine finemed medcoarse 006 02 06 2 6 20 0 20 40 60 80 100 Grain size mm Finer by weight Sand Gravel fine finemed coarse med S6 S5 S1 a b c PL1 PL2 PL3 PL4 PL5 PL6 GG1 GG4 GG7 GG8 PL7 GG5 GG2 GG3 S3 S2 S4 GG6 Fig 1 Tested grain size distribution curves a stepwise linear b gap

266 210viNEH October 1994 Chapter 26 Gradation Design of Sand and Gravel Filters Part 633 National Engineering Handbook Table 2613 Data for designed filter band 2629 Table 2614 Design filter band data for example 266 soil 2634 Table 26B1 Selected standard aggregate gradations 2641 Figures Figure 261 Grain size distribution curve for fine clay base soil 269

Media with small grain size slow the water movement and increase the chance of clogging The effective size D 10 and uniformity coefficient Uc are the principal characteristics of granular media treatment systems The ideal sand media for intermittent sand filters is a coarse sand with an effective size between 03 mm and 05 mm

Grainsize distribution curve for category1 soil nondispersive 26B1 Table 26B2 the grainsize distribution GSD of sand and gravel filters needed to prevent internal erosion or piping of soil in embankments or foundations of hydraulic structures These criteria are based on results of an

Sand Grain Size Analysis Materials Needed Equipment per table 1 6 sets of sieves 10 18 35 60 120 230 pan 6 sieves and the pan 2 Electronic Balances to measure mass of samples