Building material
Asbestos Asbestos, any of several minerals that readily separate into long, flexible fibres. Chrysotile, the fibrous form of the mineral serpentine, is the best-known type and accounts for about 95 percent of all…
Origins of agriculture
Origins of agriculture, the active production of useful plants or animals in ecosystems that have been created by people. Agriculture has often been conceptualized narrowly, in terms of specific combinations of activities…
Igloo
Igloo, also spelled iglu, also called aputiak, temporary winter home or hunting-ground dwelling of Canadian and Greenland Inuit (Eskimos). The term igloo, or iglu, from Eskimo igdlu (“house”), is related to Iglulik, a town, and Iglulirmiut,…
Shelter
Masonry Masonry, the art and craft of building and fabricating in stone, clay, brick, or concrete block. Construction of poured concrete, reinforced or unreinforced, is often also considered masonry. masonry The art…
Climate
Climate, conditions of the atmosphere at a particular location over a long period of time; it is the long-term summation of the atmospheric elements (and their variations) that, over short time periods, constitute weather.…
Industry
Industry, a group of productive enterprises or organizations that produce or supply goods, services, or sources of income. In economics, industries are customarily classified as primary, secondary, and tertiary; secondary…
Construction
Construction, also called building construction, the techniques and industry involved in the assembly and erection of structures, primarily those used to provide shelter. Construction is an ancient human activity. It began with the…
Shotcrete for Reinforcing Masonry Walls?
Shotcrete is the application of concrete to any surface through mechanical means using pneumatic appliances. It avoids the use of formwork, and ensures faster work. Shotcrete reinforcement of masonry walls…
Testing for Cement Content
Cement content in any concrete has a direct relation to the strength of the concrete, its durability and impermeability. For tests for cement content and other forms of concrete testing, standards…
Creating Concrete Signage
Concrete signs, as seen in office parks and public spaces, are permanent markers. Letters can be raised or inset into the concrete. Footer design details must include allowing for wind…
