2006 New York Code - Admixtures.

 
    § 27-608 Admixtures. Admixtures may be used in the concrete only where
  included in the preliminary test mixes made in accordance with paragraph
  three  of  subdivision  (a)  of  section 27-605 or mixes proportioned in
  accordance with the provisions of reference standard  RS  10-3.  In  the
  case of mixes proportioned in accordance with subdivision (c) of section
  27-605,  there shall be no reduction of the cement content called for in
  table 10-3A because admixtures are used in the mix. Where admixtures are
  used, the provisions of reference standards RS 10-3 and RS  10-44  shall
  apply.  In  addition,  no  anti-freeze  agents shall be used. Admixtures
  shall be added in measured quantities in conformance with  the  accepted
  mix design.