What are advantages and disadvantages of artificial seasoning. Artificial seasoning is the process by which lumber is dried using manmade devices such as a kiln. Oct 08, 2012 diy brick rocket stove cooking without electrical power duration. What are advantages and disadvantages of artificial seasoning of. Timber seasoning and laminationanswer the following questions relating to timber seasoning and lamination. What is seasoning of timber type of seasoning of timber. At present timber can be seasoned by a number of methods. Wood drying also seasoning lumber or wood seasoning reduces the moisture content of wood before its use. When the drying is done in a kiln, the product is known as kilndried timber or lumber, whereas air drying is the more traditional method there are two main reasons for drying wood. High frequency vacuum wood dryer from saga machinery co. Sep 12, 2017 this process of seasoning timber is the best as it gives very strong and durable timber, but it is extremely slow.
Sep 23, 2012 timber seasoning and laminationanswer the following questions relating to timber seasoning and lamination. This method also provides advantages such as high speed and high quality and is well suited for seasoning lumber, blocks, veneer, chips, paper and woodbased composite materials. This process of seasoning timber is the best as it gives very strong and durable timber, but it is extremely slow. The wood spice process is the process by which the moisture in the wood is reduced to the required level. By reducing the moisture content, strength, elasticity, and durability properties are developed. Regular wood seasoning is done by air drying in conditions below 18 percent moisture. In fact timber often gives the means of arriving at the cheapest solution. While, in the general scheme of seasoning, chemical seasoning promises to take its place with timehonored air drying and the more recent method of drying in a kiln, much more work will be required before its usefulness can be. The hot air speeds up the rate of evaporation of moisture from the wood, hence accelerating drying rate. Natural seasoning gives good results but takes more time. There are two main ways of seasoning timber, natural air and artificial kiln drying. Different ways of seasoning wood home guides sf gate. The timber is taken out of water and its air seasoning is done by keeping it on a tapered platform. Dec 14, 2018 this method also provides advantages such as high speed and high quality and is well suited for seasoning lumber, blocks, veneer, chips, paper and woodbased composite materials.
Before the timber can be used a large part of the moisture must be removed. Woodworking when wood is used as a construction material, whether as a structural support in a building. The roof and two other sides keep the timber relatively dry. Preservation also helps the timber to get rid of insects. The weight of lumber will be reduced by 35 percent or more by removing most. Removal of moisture from timber so as to be in equilibrium with moisture in surrounding atmospheric condition, where timber is likely to be used is called as seasoning of timber.
Apr 03, 2019 natural air seasoning artificial kiln seasoning 3. Increasing life makes timber more durable and it can be used for longer periods. Artificial or kiln seasoning it is the quickest process to dry the wood. So, artificial seasoning of timber is developed nowadays. Finally creosote oil is pumped into the chamber with high pressure about 0. Dec 23, 2015 removal of moisture from timber so as to be in equilibrium with moisture in surrounding atmospheric condition, where timber is likely to be used is called as seasoning of timber. Preservation is done using different types of preservatives. Methods and different materials used for preservation of timber is discussed. Seasoning of timber is done to fulfill some specific requirement.
Live simple, live free tinyhouse prepper 3,221,115 views. These can be conveniently discussed under two headings. Advantages and disadvantages of medium density fibreboard are discussed below. Diy brick rocket stove cooking without electrical power duration. It is a process by which the amount of moisture in. Reduces weight of wood thus reducing handling cost 6. Seasoning of timber reason methods benefits civil engineering. The advantages of timberframe building mother earth news. The advantages of timber timber is worth more than you pay timber is worth more than you pay whether an article is cheap or expensive depends on what one can achieve with it and the cost of the alternatives. Both methods require the timber be stacked and separated to allow the full circulation flow of air, etc. Advantages and disadvantages of tunnels tunnels are underground artificial passages which are constructed without disturbing the ground surfac e. In this article, youll know 5 best methods for seasoning of timber and wood. When the drying is done in a kiln, the product is known as kilndried timber or lumber, whereas air drying is the more traditional method.
With the emphasis on natural and green products, using natural wood is becoming more popular for lumber and fuel needs. In other words seasoning of timber means getting rid of the sap and. It fre quently happens that in the sapwood, and sometimes in the heart wood, the weight of the water is more than the weight of the wood substance itself. In this method timber is seasoned in a chamber with regulated heat, controlled humidity and proper air circulation. Seasoning of timber natural seasoning artificial seasoning water seasoning air seasoning seasoning by boiling chemical seasoning kiln seasoning. The advantages of timberframe building timberframe building is a versatile, timetested method of natural building that allows you to create beautiful, sturdy buildings. Air drying airdrying is the drying of timber by exposing it to the air. Wood thats been treated or dried with chemicals may be more resistant to bending and damage from insects, but the downsides of chemical treatments are numerous. Hot air, at predetermined relative humidities and temperature is blown into timber stacks in a kiln. The methods involved in underground operations are known as tunnel driving. As compared to the artificial seasoning method, this method is timeconsuming. Decreased seasoning defects warping, checks, splits, etc. Tunnels are underground artificial passages which are constructed without disturbing the ground surface.
Forced air circulation by using large fans, blowers, etc. Tunnels may be constructed through hills, below ground, rivers etc. The technique of airdrying consists mainly of making a stack. Even though it is a slow process it will produce wellseasoned timber. What are advantages and disadvantages of natural seasoning. Artificial seasoning of timber, civil engineering, assignment. In the progressive kiln, timber enters at one end and moves progressively through the kiln much as a car moves through a tunnel. After seasoning, the wood is steamed to eliminate collapse and case hardening.
No expensive equipment needed, environmentally friendly disadvantages. Give two advantages that air dried timber seasoning has over kiln dried timber seasoning. Preservation of timber methods and materials for timber. Mdf has economic value to common people as it is cheaper at cost and inexpensive. Artificial methods of seasoning timber drying rates in a kiln can be carefully controlled and defect losses reduced to a minimum. By artificial seasoning, timber is seasoned with in 45 days. Air seasoning the easiest way, but not the most effective method of seasoning timber, is to stack it outside. The timber is laid out as seen in the diagram below.
Water seasoning to remove the sap of the wood, the timber balks are immersed in flowing water for 2 to 3 weeks. Advantages of natural seasoning of wood aboutcivil. Kiln seasoning two main methods used in artificial seasoning, compartmental progressive. Air dried seasoning kiln dried seasoningthere are advantages and. Regular wood seasoning is done by air drying in conditions.
What is seasoning of timber type of seasoning of timber benefit. What are advantages and disadvantages of artificial. Followings are the reasons to perform timber seasoning. Advantages and disadvantages of air seasoning of timber compared to drying 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. This is simply the weight of water contained in a piece of timber compared with the weight of actual woody substance in the same piece.
In this technique timber is seasoned in a chamber with, controlled humidity, regulated heat and correct air circulation. Free unfinished flashcards about seasoning of timber. Reduction of moisture content along with improving some qualities before the use of woods is called seasoning of timber. Seasoning of timber methods of timber seasoning ravi dhami. Both methods rely on the controlled environment to dry out the timber requiring factors. The process of removing excess moisture from wood by drying it after conversion is termed as timber seasoning. Then, it is placed in airtight chamber and inside air is pumped out.
Preservation of timber is carried out to increase the life of timber. Seasoning the process of seasoning is simply that of removing moisturefromthewooduntilit reaches equilibrium,or a state of balance, with its surrounding atmosphere. This is the modern method of seasoning any type of timber in a short time. It is economical because not capital investment is needed. Exact moisture content achieved, more control over seasoning, uniform circulation of air. Timber seasoning and laminationthere are two ways that timber may. Seasoning of timber from day to day, most people have some contact with seasoned timber. State two advantages and two disadvantages of artificial seasoning. In this method, the wood is kept in a chamber with regulated heat.
It is normally placed in a hut building, with two sides open to allow air to circulate. Temperature and humidity differentials are maintained throughout the length of the kiln so that the lumber charge is progressively dried as it moves from one end to the other. Both methods require the timber be stacked and separated to allow the. Advantages of timber timber is a versatile material. Timber is seasoned to dry out the timber to bring it to a usable and workable condition. When wood is used as a construction material, whether as. 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. This is as yet the most common process of seasoning of timber used throughout the world. Length of drying time is also greatly reduced and is predictable so that dry lumber inventories can often be reduced. Air seasoning can be done at a place where timber already stores. The advantages of timber frame building timber frame building is a versatile, timetested method of natural building that allows you to create beautiful, sturdy buildings.
Sawn timber is stacked in a dry place about 30cm above floor level with longitudinal and cross pieces arranged one upon another, leaving space for the free circulation of air. Advantages and disadvantages of the two types of seasoning. If wood is cut to size before it is seasoned, it will shrink during drying and thus be undersized in its final form. Vertical spacing achieved by using timber battens 25mm of the same species. Expensive to set up, skilled operator needed, different drying schedules for various species. Two of the main reasons are to prevent decay and injury from insects, and to increase the timbers. Following are the advantages and disadvantages of tunnels. While that atmosphere could, theoretically, range anywherefrom 0% upwards,legislation in newsouth wales, the timber marketing act 1977, defines the. As fresh timber which is obtained from trees contains about 30 to 40 % sap or moisture. If you mean lumber or boards, the lumber needs to be stacked in a way. Seasoning is the reduction of moisture content of timber to that of thesurrounding air sydney area approx. There are multiple advantages to having wood artificially seasoned that relate to the quality, strength and cost of the wood.
This document has been scanned from hardcopy archives for. Seasoning is the name given to the methods of drying timber there are two methods by which timber can be dried. Artificial grass or synthetic grass as it is commonly referred is a surface made up of synthetic fibres coated with silicone protruding from a polypropylene base that is manufactured to look like natural grass. It involves drying the timber in a specially designed kiln where there is perfect control over temperature, humidity and air circulation. Advantages of timber roof trusses in building construction. Seasoning can be achieved in a number of ways, but all methods aim to remove water at a uniform rate to prevent damage to the wood during drying seasoning degrade. 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. At the opposite of brick or concrete walls, timber walls dont need to be very thick. With this process the timber is roughly sawn to size and stacked using spacers called stickers, with the timber stacked in the open air. May 11, 2007 seasoning is the process of drying timber to remove the bound moisture contained in walls of wood cells, producing a new product called seasoned timber. Artificial method of seasoning or kiln seasoning speeds up the seasoning process. Seasoning is the process of drying timber to remove the bound moisture contained in walls of wood cells, producing a new product called seasoned timber.
It takes more than six months for timber to season in moderate climates. The amount of water thus contained varies with the kind of wood, the conditions under which it grew, and the season. The term seasoning carries the meaning that the wood had been exposed to one or more seasons of weather. More than half the weight of freshly cut timber consists of moisture or sap. The time required varies with the nature of timber, usually 15 days to two months. In other words, the timber or lumber is air dried for about one year. Advantages and disadvantages of air seasoning of timber. Here also different methods of artificial seasoning are there and they are as follows.