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Engineering bricks are a type of brick used where strength, low water porosity or acid (flue gas) resistance are needed. Engineering bricks can be used for damp-proof courses. Clay engineering bricks are defined in British Standard BS 6100 "Glossary of building and civil engineering terms" as "brick sized fired clay units having a dense and strong semi vitreous body, conforming to defined limits for water absorption and compressive strength."〔http://www.georgelines.co.uk/pdf/Engineering%20Bricks%20Technical%20Detail.pdf〕 Stronger and less porous engineering bricks (UK Class A) are usually blue due to the higher firing temperature〔http://www.ucl.ac.uk/earth-sciences/impact/geology/london/ucl/materials/brick〕 whilst class B bricks are usually red. Class A bricks have a strength of 125N/mm² and water absorption of less than 4.5%; Class B bricks have a strength greater than 75N/mm² and water absorption of less than 7%. Accrington brick is one type of engineering brick. ==See also== *Staffordshire blue brick 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「engineering brick」の詳細全文を読む スポンサード リンク
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