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cement

(Encyclopedia)cement, binding material used in construction and engineering, often called hydraulic cement, typically made by heating a mixture of limestone and clay until it almost fuses and then grinding it to a ...

mortar, in building

(Encyclopedia)mortar, in building, mixture of lime or cement with sand and water, used as a bedding and adhesive between adjacent pieces of stone, brick, or other material in masonry construction. Lime mortar, a co...

tree surgery

(Encyclopedia)tree surgery, practice of repairing damaged trees to restore their appearance and to arrest disease. Injured or diseased parts are first removed (even small cavities in the bark may harbor injurious f...

Alpena

(Encyclopedia)Alpena ălpēˈnə [key], city, seat of Alpena co., N Mich., on Thunder Bay, an arm of Lake Huron; inc. 1871. Limestone quarried nearby is used to make cement, Alpena's ch...

Padang

(Encyclopedia)Padang pädängˈ [key], city (1990 pop. 631,263), capital of Sumatra Barat prov., on W Sumatra, Indonesia, on the Indian Ocean at the mouth of the small Padang River. An important port, it has a larg...

concrete

(Encyclopedia)concrete, structural masonry material made by mixing broken stone or gravel with sand, cement, and water and allowing the mixture to harden into a solid mass. The cement is the chemically active eleme...

Novorossiysk

(Encyclopedia)Novorossiysk or Novorossiisk both: nôˌvərəsēskˈ [key], city (1989 pop. 186,000), Krasnodar Territory, SE European Russia, on the Black Sea. A major port and a naval base, it exports grain and oi...

water glass

(Encyclopedia)water glass or soluble glass, colorless, transparent, glasslike substance available commercially as a powder or as a transparent, viscous solution in water. Chemically it is sodium silicate, potassium...

kiln

(Encyclopedia)kiln kĭl, kĭln [key], furnace for firing pottery and enamels, for making brick, charcoal, lime, and cement, for roasting ores, and for drying various substances (e.g., lumber, chemicals). Kilns may ...

Canada balsam

(Encyclopedia)Canada balsam, yellow, oily, resinous exudation obtained from the balsam fir. It is an oleoresin (see resin) with a pleasant odor but a biting taste. It is a turpentine rather than a true balsam. On s...