Backfill is a mix of calcium bentonite and gypsum and is used to surround buried sacrificial anodes to improve the capacity of the anode by reducing electrical resistance. Backfill can be placed around the anode during installation, the backfill must be well compacted around the anode and dampened down by liberal application. Backfill should meet
In geotechnical engineering, drilling fluid is used to aid the drilling of boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling rigs, drilling fluids are also used for much simpler boreholes, such as water wells. Liquid drilling fluid is often called drilling mud. The three main categories
Dispersible soils are those where the clay and fine silt particles (<0.005 mm) disperse into a state of separation into extremely fine colloidal units when exposed to water. These particles can remain suspended in water essentially forever because of common electrical charges on the colloidal surfaces, causing them to repel each other and stay in suspension. Stormwater runoff from unprotected dispersible soils on construction
REGYP can now provide high quality gypsum in New Zealand. Available products include: Mined gypsum - natural/raw Superflocc G100S - Solution grade gypsum Superflocc G100A - Aerial grade gypsum Superflocc G200 - Fine grade gypsum Mined gypsum is available in bulk or bag and the Superflocc products are available in 1 & 1.2 tonne bulk bags.
PRODUCT DESCRIPTION: A natural high purity crystalline calcium sulphate dihydrate with a particle size distribution designed for easy dissolution in both pressurised and gravity irrigation systems. TYPICAL CHEMICAL ANALYSIS OF RAW MATERIAL: CaSO4.2H2O > 95 % SiO2 < 2 % Na2O < 0.05 % HCl insoluble content < 1.0 % TYPICAL SPECIFIC PRODUCT DATA: Fineness