free water-cement ratio
31building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
32Italy — /it l ee/, n. a republic in S Europe, comprising a peninsula S of the Alps, and Sicily, Sardinia, Elba, and other smaller islands: a kingdom 1870 1946. 57,534,088; 116,294 sq. mi. (301,200 sq. km). Cap.: Rome. Italian, Italia. * * * Italy… …
33mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… …
34Egypt — /ee jipt/, n. 1. Arab Republic of. a republic in NE Africa. 64,791,891; 386,198 sq. mi. (1,000,252 sq. km). Cap.: Cairo. Arabic, Misr. Formerly (1958 71), United Arab Republic. 2. an ancient kingdom in NE Africa: divided into the Nile Delta… …
35Kenya — Kenyan, adj., n. /ken yeuh, keen /, n. 1. a republic in E Africa: member of the Commonwealth of Nations; formerly a British crown colony and protectorate. 28,803,085; 223,478 sq. mi. (578,808 sq. km). Cap.: Nairobi. 2. Mount, an extinct volcano… …
36Economy of the People's Republic of China — Economies of Special Administrative Regions of Hong Kong and Macau are administered separately from the rest of People s Republic of China. Therefore, the information below pertains only to mainland China unless specified otherwise. For the… …
37Afghanistan — /af gan euh stan /, n. a republic in central Asia, NW of India and E of Iran. 23,738,085; 250,000 sq. mi. (647,500 sq. km). Cap.: Kabul. * * * Afghanistan Introduction Afghanistan Background: Afghanistan s recent history is characterized by war… …
38Poland — /poh leuhnd/, n. a republic in E central Europe, on the Baltic Sea. 38,700,291; ab. 121,000 sq. mi. (313,400 sq. km). Cap.: Warsaw. Polish, Polska. * * * Poland Introduction Poland Background: Poland is an ancient nation that was conceived around …
39Vietnam — /vee et nahm , nam , vyet , vee it /, n. 1. Official name, Socialist Republic of Vietnam. a country in SE Asia, comprising the former states of Annam, Tonkin, and Cochin China: formerly part of French Indochina; divided into North Vietnam and… …
40Greenhouse gas — Simple diagram of greenhouse effect. A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect.[1] …
