Sand coating

Target Standard Sand-Coated Steel [1/4-inch (6.375-mm)] Bonded to Concrete a... 

We now compare theoretical predictions with experimental results obtained using silica sand coated with a 4% resin consisting of 100 parts by weight of a phenol-formaldehyde novolac and 5, 10, or 15 parts of hexamethylenetetramine (hexa) as hardener (Aranguren et al., 1984). 

In a second laboratory experiment, the chemical persistence of carbofuran applied as Furadan 10G (the commercial sand-coated granule) and 2 Sierra controlled-release carbofuran formulations (samples no. 32-47-2, 9.1% AI and 32-48-2, 9.7% AI) were monitored for two months in three soil types, no. 29, 46, and 44 (Table I). Three-hundred forty-one grams (300 g oven-dry weight) of each soil were weighed into glass bottles and fortified with 1.5 g of one of the three formulations. The actual rates of application were 455 ppm (no. 32-47-2), 485 ppm (no. 32-48-2), and 500 ppm (Furadan 10G). The soils were thoroughly mixed and adjusted to 25% of MHC. The bottles were sealed with Parafilm and incubated at 25°C. At biweekly intervals, 20-g replicates of each soil were removed for quantitative analysis of carbofuran. 

Quartz sand coated with TNT or crystalline RDX was vigorously mixed with wet sediment [14],... 

Uglow Black Silver. A sand coated with silver and... 

The work life of sand coated with aqueous sodium silicate is dependent on the relative humidity of the environment At 20 RH and 60 RH, the work life is found to be 30 minutes and 90 minutes respectfully. Fig. 1. Coated sand that is sealed to prevent water loss or CO absorption, has a work life in excess of three weeks Even a simple cover retards moisture loss and extends the work life for example, at 20 RH a cover increases the work life from 30 minutes to over 3 hours ... 

Spent foundry sand consists chemically of siUca sand coated with a thin film of burnt carbon, residual binder (bentonite, sea coral, resins), and dust. Figure 3 shows the chemical composition of a typical sample of spent foundry sand as determined by x-ray fluorescence. 

Spirally wound and sand-coated bars - manufactured by spirally winding the pultrusion rod with a sand-coated fibre tow. 

Sand coated with ferrite Solids mixing studied by magnetic separation Horio et al. (1986a)... 

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