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artificial seasoning of timber

Seasoning of timber is also obtained by boiling in water for 3 to 4 hours. To make it suitable … Artificial stone can be moulded into most intricate forms easily and so it is most economical when it is substituted for the carvings and ornamentations in natural stone. It may even decay. Also read: What Is Formwork Failure | Causes of Formwork Failure. 7. Care must be taken not to dry out timber too quickly otherwise the timber may split and crack or have severe stresses induced into it. Timber seasoning types. The timber is thus boiled with water for about three to four hours. Natural / Air Seasoning Artificial/ Kiln seasoning 3. This is such an important stage in the drying that it is given a special name, and the term is "fibre saturation point". Moisture content of wood can be brought down to about 10 – 20% by natural seasoning. Natural Seasoning; Artificial Seasoning; Lets discuss both methods one by one. Moisture content can be reduced as per requirements. The popular method of artificial seasoning is kiln seasoning. Timber is seasoned under controlled temperature and humidity conditions with proper air circulation and ventilation system. The Seasoning of Timber "Seasoning" is the name given to the methods of drying timber. To decrease shrinkage, cracks and warpage in wood. Natural Drying/Air Drying Air-drying is the drying of timber by exposing it to the air. Well -seasoning timber is ready to use. The major aspect of his research work was focused on moisture content in timber resulting from poor and improper seasoning where he revealed how various artificial seasoning methods do account for the main causes of defects in timber and how they can be prevented. Kiln Seasoning or Conditioning (aka Artificial Seasoning) is the method now most commonly used, especially for Softwood, because it is quicker and more economic. Seasoning of timber can be carried out either naturally or artificially. Moisture content in wood can be reduced to the desired level due to the artificial seasoning. The purpose of seasoning is to reduce the moisture content in the wood to a level appropriate to the use of the articles made from the wood. Artificial seasoning is controlled by application of both heat and humidity which enables to reduce the moisture content quickly and accurately. It is difficult to boil for large quantities of wood, so hot steam is sometimes passed through wooden logs in enclosed rooms. To give strength, hardness and to make electrically resistant. Natural Seasoning. Advantages Of Kiln Seasoning. The different methods of seasoning are: (a) Boiling (b) Kiln seasoning (c) Chemical seasoning (d) Electrical seasoning. Kiln-seasoning thus began to assume an important position, where timber was in question, in commercial centres. Seasoning is necessary because it reduces the risk of decay or attack by fungi on green or unseasoned timber. Manufacturing of Artificial Stone. To resist the attack of insects, fungi. Seasoning is done for the following reasons: When wood utilised as fuel, to make it burn quickly seasoning is done. It also gives good results. Seasoning of timber means removal of moisture content from timber. Natural Seasoning. In this method of artificial seasoning, the timber is immersed in water and water is then boiled. • Seasoning of timber should be protected from rain and humidity. The seasoning of timber using natural elements like water, the air is known as NATURAL SEASONING The natural seasoning could even be water seasoning or air seasoning. Publication info. It is the process in which logs of timber are boiled in water in temperature at which is placed up to a boiling point and is maintained for several hours after which it is dried naturally. Artificial Seasoning To make the drying more uniform and even, by controlled conditions artificial seasoning is adopted. For practical use, it is formed into a mortar or is used as concrete. It is uneconomical to provide artificial seasoning to timber sections thicker than 100 mm, as such sections dry very slowly, hence such thicker timber sections are usually seasoned by the process of air seasoning. MC Neills Seasoning. In natural seasoning, timber … 15. Advantages and Disadvantages of Air Seasoning of Timber compared to Kiln Drying (Continued from Timber Kiln Drying Equipment) • Kilns can dry to lower moisture contents than can air seasoning – in fact we must use kilns in countries having cool, moist weather conditions (such as U.K.) for most indoor applications. After artificial seasoning the wood becomes harder, whereas in natural seasoning the wood becomes soft. Natural Seasoning : Timber pieces can either be stacked horizontally or vertically and the seasoning is carved out by natural air. Seasoning of Timber Revised by A. LAMOND and J. HARTLEY "Free" and "Bound" moisture Expressed as a formula: Fibre saturation point As the free moisture leaves the cell cavity, it will eventually become empty, leaving the cell wall still saturated. Newly felled tree contains a considerable quantity of sap. Therefore, defects in timber such as shrinkage, cracks and wrapping are minimum. If this sap is not removed the timber is likely to warp, crack and shrink. Cl. Free moisture is present in timber as water vapor while bound moisture is present in cell walls. seasoning of Timber: Method of Seasoning:-The following two methods are commonly used for the seasoning of Timber. Seasoning increase the strength of timber; To make concrete durable; To increase dimensional stability ; Seasoning reduces the weight of timber; Seasoning Methods. Artificial Seasoning. : 855,880 [30] Foreign Application Priority Data 9 Sept. 6, l968 Great Britain 42,609/68 [52] US. Natural Seasoning ; Artificial Seasoning; 1. 1. There are Two Methods of Seasoning of Timber. The different methods of seasoning are: Boiling; Kiln seasoning; Chemical seasoning; Electrical seasoning. There are different methods of artificial seasoning. Seasoning of Timber. 2. Time required for natural seasoning of timber is around 120 to 180 days. Seasoning can be completed in 4 to 5 days only. Book Material. Well seasoned in a short span of time. Seasoning can only be completed in 4 to 5 days. This method of seasoning timber is cheap and simple. 2) Kiln Seasoning Advantages: Insects are killed during this process, Require little stacking space, Moisture content of the timber may be brought to any desired level 34/1 [51] Int. Seasoning isn’t always uniform in all the section of timber. Artificial seasoning. There are two method of Seasoning as classified below. The procedure of manufacturing artificial stone is as follows: a. To minimise the cost of handling, transport by decreasing the weight of wood. By. The kiln avoids the heat transmission loss as it discontinues the flow of steam and heated oil. Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. With this process the timber is roughly sawn to size and stacked using spacers called stickers, with the timber stacked in the open air. The process of boiling or steaming develops the strength and elasticity of the wood but is economical of the enormous cost. Artificial drying or kiln drying. So much so that repeated inquiries for … Seasoning may be completed in 4 to 5 days only. It reduces the time for seasoning. The periods of seasoning and shrinkage are reduced by this method, but it affects the elasticity and strength of wood. (ii) Artificial Seasoning: In this method timber is seasoned in a chamber with regulated heat, controlled humidity and proper air circulation. Howard, Alexander Liddon, 1863-1946 Type. There are two methods by which timber can be dried: Natural drying or air drying. Why we need Seasoning Of Timber. Types of Timber Seasoning: The main types of timber seasoning are as under. United States Patent 1191 Pless ARTIFICIAL SEASONING OF TIMBER [76] Inventor: John Henry Pless, 48 Kinnerton St., London, S.W.l, England [22] Filed: Sept. 8, 1969 [21] Appl. Artificial Seasoning of timber are: A. Kiln Seasoning. The wood with desired moisture content may be obtained by the artificial seasoning. This is a very quick method. Shrinkage, cracking and warping are minimized in artificial seasoning. 1.Boiling. A meter is attached to the kiln which shows the reading of the moisture contained in the timber. When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method.. In artificial seasoning, the drying is fast and uniform. So the chances of fungi and insect attacks are less. SEASONING OF TIMBER. In Water Seasoning method, timer kept immersed in ponds or … A manual of the timbers of the world; their characteristics and uses, to which is appended an account by S. Fitzgerald of the artificial seasoning of timber. Vertical spacing achieved by using timber battens (25mm) of the same species. Timber Seasoning Kiln comprises of chambers, made out of the best quality material like MS steel sections with great resistance against corrosion. The timber contains free moisture and bound moisture. The wood is allowed to dry after boiling. Natural Seasoning of Timber: Artificial Kiln Seasoning of Wood: Natural Seasoning is the most traditional way of seasoning wood or timber. The moisture content of timber should be kept between 10 to 12 % of its dry weight. Artificial Seasoning: In this technique timber is seasoned in a chamber with, controlled humidity, regulated heat and correct air circulation. In comparison to conventional pressurized steam heated kiln with boiler, our seasoning kilns require less maintenance. Less … Natural or Air seasoning: T his method of seasoning the wood is simple and cheap, but it very slow. The process of dying timber or removing moisture or sap, present in a freshly felled tree, is called seasoning of Timber. A newly fell tree contains water up to 50% of its dry weight. Artificial Seasoning: In this method, the wood is kept in a chamber with regulated heat, Controlled humidity and proper air circulation. Published material. No. LondonMacmillan1920 Subjects In this method wood is dried usually by the keeping the wood exposed to air, so that the moisture evaporates and wood is seasoned. The equilibrium moisture content of artificial seasoning (kiln) can be controlled manually or automatically. A manual of the timbers of the world; their characteristics and uses, to which is appended an account by S. 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