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Bags on the course above are offset by 200 mm (8 in)—half of the 450 mm (18 in) wall width—similar to running bond in masonry. Bags can either be pre-filled with material and hoisted up, or bags or tubes are filled in place. The weight of the earthen fill locks the bag in place on the barbed wire below.
The wet paste is than levelled off. Application of render using a machine is usually a much faster operation than by hand, meaning that larger areas can be rendered during a working day. The application of render has to be completed in the correct weather conditions. If the temperature is too low, moisture can be trapped within the render.
Some have a polymer additive added to the traditional cement, lime and sand mix for enhanced water resistance, flexibility and adhesion. [9] [10] Acrylic premixed renders have superior water resistance and strength. [11] They can be used on a wider variety of surfaces than cement render, including concrete, cement blocks, and AAC concrete paneling.
Bagwork concrete will generally reach full strength within 28 days. Each bag must be pierced by at least one, and preferably up to four pins. Bagwork is a simple and convenient method of underwater concrete placement which does not require pumps, plant, or formwork, and which can minimise environmental effects from dispersing cement in the water.
Bulk bags, also known as big bags, are much larger than traditional sandbags. Moving a bag of this size typically requires a forklift truck. Bulk bags are usually made of woven or non-woven geotextiles. Large bags of sand are often used in flood control and making temporary patches to water barriers.
Steer clear of products with bloated packaging at the store. It's a food safety issue—here's why. The post If You See Bloated Food Packaging, This Is What It Means appeared first on Reader's Digest.
The first coat or rendering is from 1 ⁄ 2 to 3 ⁄ 4 inches thick, and is mixed in the proportions of from one part of cement to two of sand to one part to five of sand. The finishing or setting coat is about 3 ⁄ 16 inches thick, and is worked with a hand float on the surface of the rendering, which must first be well wetted.
US patent 4,075,374 lists the by-weight formulation as 10 parts pressure calcined gypsum, 38-48 parts sand, and 4-10 parts water. 0.03 to 0.1 parts of a latex emulsion, such as Dow Latex 460, were also added. To prevent foaming, a defoamer such as WEX was added to the latex at a concentration of 0.2%. It was stated that gypsum calcined at ...