Hong Kong Regulations
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BUILDING (CONSTRUCTION) REGULATIONS - REGULATION 51
Aggregate
(1) Subject to subregulations (2) and (3) aggregates used shall be crushed or
uncrushed natural mineral substances and shall comply with the quality and
grading requirements suitable for the production of concrete.
(2) Separate fine and coarse aggregate shall be used for concrete.
(3) No concrete containing embedded metal shall have in it unwashed marine
sand. (Enacted 1990)
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