Increases water retention in soil: Gypsum when applied to sodic soil reduced the levels of exchangeable sodium resulted in increase in water retention. The improved soil structure help in the more retention of water.
Prevents crusting of soil: Gypsum application can decrease and prevent the crust formation on soil surfaces which result from rain drops or from sprinkler irrigation on unstable soil. It can prevent crusting that result when acid soils are limed and the gypsum is coapplied with the lime.
Tests can be run to determine the amount of treatment necessary. Also, proactive steps can be taken. If the pond or lake is one in the planning stages, to be constructed, the watershed size should be considered in terms of the pond or lake to be constructed. In other words, the watershed is all the land that drains to the same place, and thus, the character and properties of that land needs to be considered. If it is bare ground, then planting crops or vegetation will help prevent the sloughing off of particles into the lake. It is easier to keep soil from entering the water than removing it once it is there.
Some gypsum plaster systems can be applied directly to drywall with the use of bonding agents. This type of plaster, known as ”veneer plaster”, is typically applied in one thin coat. Gypsum veneer plaster is fast and usually less expensive than traditional gypsum plaster. When applying a veneer plaster, all joints in the drywall must be prepared with joint compound or with the manufacturer’s recommended joint treatment materials. Once the joints are treated, a bonding agent is required. This is a water based PVA (polyvinyl acetate) or an acrylic bonding agent. PVA bonding agents are for interior use only because they re-emulsify when they get wet. PVA bonding agents are the most popular because they can be dry before the plaster coat is applied (as opposed to an acrylic bonding agent, which must still be wet when the plaster is applied, forcing the applicator to rush the process). A controlled environment is also important when applying a gypsum veneer finish, although some veneers are modified with acrylics, cement and chemicals, providing a better bond, higher compressive and tensile strengths, crack resistance, color retention and crack resistance. These modifications may make the product easier to work with and will give the applicator more flexibility. Once the finish coat is dry and completed, it should be sealed with a water based sealer.
Detergents, 5% Nitric Acid, 10% Ammonia, Ethanol, Oleic Acid, Bleach, 10% Hydrochloric Acid, Carbon Tetrachloride, Hydrogen Peroxide, and Port Wine will have no effect on the gypsum panel even if these chemicals come into contact with the panels for 24 hours. They can be easily washed with soap and water. 10% Citric Acid, Ketchup, 10% Sodium Hydroxide, Lemon juice, Coffee, Mayonnaise, Tea, Cooking oil, Milk, Trisodium Phosphate, Crayon, Mustard, and Vinegar will also have no effect on the gypsum board even when exposed to these chemicals for 24 hours. Pencil marks will leave a very light stain though. Acetone exposure for 24 hours then washed with soap and water will give the panels a shiny finish.
The Environmental Protection Agency (EPA), Superfund program considers the amount of radon gas entering homes and buildings from reclaimed phosphate mine lands. Its decisions regarding whether to remediate man-made radioactive contamination sites are usually driven primarily by how much of the radioactive metals are present, in this case, a reclaimed Florida phosphate strip mine.
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