A brickworks, also known as a brick factory, is a

factory A factory, manufacturing plant or production plant is an industrial facility, often a complex consisting of several buildings filled with machinery, where workers manufacture items or operate machines which process each item into another. Th ...

for the manufacturing of

brick A brick is a type of construction material used to build walls, pavements and other elements in masonry construction. Properly, the term ''brick'' denotes a unit primarily composed of clay. But is now also used informally to denote building un ...

s, from

clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impuriti ...

shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of Clay mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4) and tiny f ...

. Usually a brickworks is located on a clay

bedrock In geology, bedrock is solid rock that lies under loose material ( regolith) within the crust of Earth or another terrestrial planet. Definition Bedrock is the solid rock that underlies looser surface material. An exposed portion of bed ...

(the most common material from which bricks are made), often with a quarry for clay on site. In earlier times bricks were made at

brickfield A brickfield is a field or other open site where bricks are made. Land may be leased by an owner to a brickmaster, by whom the manufacture of bricks may be conducted. Historically, the topsoil was typically removed and the clay beneath was str ...

s, which would be returned to agricultural use after the clay layer was exhausted.

Equipment

Most brickworks have some or all of the following: *A

kiln A kiln is a thermally insulated chamber, a type of oven, that produces temperatures sufficient to complete some process, such as hardening, drying, or Chemical Changes, chemical changes. Kilns have been used for millennia to turn objects m ...

, for firing, or 'burning' the bricks. *Drying

yard The yard (symbol: yd) is an English units, English unit of length in both the British imperial units, imperial and US United States customary units, customary systems of measurement equalling 3 foot (unit), feet or 36 inches. Sinc ...

shed A shed is typically a simple, single-storey (though some sheds may have two or more stories and or a loft) roofed structure, often used for storage, for hobby, hobbies, or as a workshop, and typically serving as outbuilding, such as in a bac ...

, for drying bricks before firing. *A building or buildings for manufacturing the bricks. *A

quarry A quarry is a type of open-pit mining, open-pit mine in which dimension stone, rock (geology), rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some juri ...

for clay. *A pugmill or clay preparation plant (see below).

Brick making

Bricks were originally made by hand, and that practice continues in developing countries and with a few specialty suppliers. Large industrial brickworks supply clay from a quarry, moving it by

conveyor belt A conveyor belt is the carrying medium of a belt conveyor system (often shortened to a belt conveyor). A belt conveyor system consists of two or more pulleys (sometimes referred to as drums), with a closed loop of carrying medium—the conveyor b ...

truck A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construct ...

lorry A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructio ...

to the main factory, although it may be stockpiled outside before entering the machinery. When the clay enters the preparation plant (Clay Prep) it is crushed, and mixed with water and other additives which may include breeze, a very fine

anthracite Anthracite, also known as hard coal and black coal, is a hard, compact variety of coal that has a lustre (mineralogy)#Submetallic lustre, submetallic lustre. It has the highest carbon content, the fewest impurities, and the highest energy densit ...

that aids firing. This process, also known as pugmilling, improves the consistency, firing qualities, texture, and colour of the brick. From here, the processed clay can either be extruded into a continuous strip and cut with wires, or be put into moulds or presses (also referred to as ''forming'') to form the clay into its final shape. After the forming or cutting, the bricks must be dried - in the open air, in drying sheds, or in special drying kilns. The dried bricks must then be fired or "burnt" in a kiln, to give them their final hardness and appearance. Ziegelei Schwarting

In the mid-nineteenth century the development of automated brickmaking machines such as the Bradley & Craven Ltd "Stiff-Plastic Brickmaking Machine" revolutionised the brick-manufacturing process. , one of the largest single brickworks site in the world able to manufacture one million bricks per day stands on the banks of the Swan River in

Perth Perth () is the list of Australian capital cities, capital city of Western Australia. It is the list of cities in Australia by population, fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth . The ...

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

Environmental effects

Zigzag brick kilns are recommended over traditional brick kilns because they consume less coal.

Historical notes

In the past, clay was often transported from the quarry to the brickworks by

narrow gauge railway A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge (distance between the rails) narrower than . Most narrow-gauge railways are between and . Since narrow-gauge railways are usually built with Minimum railw ...

or aerial ropeway.

Notable brickworks

* The

London Brick Company The London Brick Company, owned by Forterra plc, is a leading United Kingdom, British manufacturer of bricks. History The London Brick Company owes its origins to John Cathles Hill, a developer-architect who built houses in London and Peterbo ...

* Bursledon Brickworks * Evergreen Brickworks

References