water glass cement
21Concrete — This article is about the construction material. For other uses, see Concrete (disambiguation). Outer view of the Roman Pantheon, still the largest unreinforced solid concrete dome.[1] …
22Zinc oxide — Other names Zinc white Calamine Identifiers …
23Fly ash — Photomicrograph made with a Scanning Electron Microscope (SEM): Fly ash particles at 2,000x magnification Fly ash is one of the residues generated in combustion, and comprises the fine particles that rise with the flue gases. Ash which does not… …
24Lunarcrete — Laboratory determined properties for lunarcrete[1][2] Compressive strength 39–75.7 N/mm2 (MPa) Young s modulus 21.4 kN/m2 Density 2.6 g/cm3 Temperature coefficient …
25Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …
26Zambia — Zambian, adj., n. /zam bee euh/, n. a republic in S Africa: formerly a British protectorate and part of the Federation of Rhodesia and Nyasaland; gained independence 1964; a member of the Commonwealth of Nations. 9,349,975; 288,130 sq. mi.… …
27Structural engineering — is a field of engineering dealing with the analysis and design of structures that support or resist loads. Structural engineering is usually considered a speciality within civil engineering, but it can also be studied in its own right. [cite… …
28silica mineral — Any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, melanophlogite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically. * * * Introduction… …
29Turquoise — For other uses, see Turquoise (disambiguation). Turquoise Turquoise (tumble finished) one inch (25 mm) long. This pebble is greenish and therefore low grade General …
30silicon — /sil i keuhn, kon /, n. Chem. a nonmetallic element, having amorphous and crystalline forms, occurring in a combined state in minerals and rocks and constituting more than one fourth of the earth s crust: used in steelmaking, alloys, etc. Symbol …
