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Timber can be dried to any desired low moisture content by conventional or solar kiln drying, but in air drying, moisture contents of less than 18% are difficult to attain for most locations. The drying times are considerably less in conventional kiln drying than in solar kiln drying, followed by air drying.
Sand is used with cement, and sometimes lime, to make mortar for masonry work and plaster. Sand is also used as a part of the concrete mix. An important low-cost building material in countries with high sand content soils is the Sandcrete block, which is weaker but cheaper than fired clay bricks. [13] Sand reinforced polyester composite are ...
Today, they are specialty timbers as a result of their scarcity, although lower grade stocks are sold for landscaping use. Kauri is a superb timber for building the hulls and decks of boats. It too is now a specialty timber and ancient logs (in excess of 3 000 years) that have been mined from swamps are used by wood turners and furniture makers.
The low cost and widespread availability of the limestone, shales, and other naturally occurring materials used in portland cement make it a relatively cheap building material. Its most common use is in the production of concrete, a composite material consisting of aggregate (gravel and sand), cement, and water.
Bottle kiln: a type of intermittent kiln, usually coal-fired, formerly used in the firing of pottery; such a kiln was surrounded by a tall brick hovel or cone, of typical bottle shape. The tableware was enclosed in sealed fireclay saggars; as the heat and smoke from the fires passed through the oven it would be fired at temperatures up to 1,400 ...
In 1906, the now-common use of wood wool in the cooling pads of evaporative coolers appeared in a patent that stated, "I have found that excelsior makes a very cheap and good material for this purpose." [13] In the beginning of the 20th century wood wool was used as a raw material for producing wood wool panels in Europe, especially in Austria.