2014 English Special Provisions to Item 421 - HYDRAULIC CEMENT CONCRETE (Statewide & Districtwide, Current)

SP421-010  PDF  RTF   - changes mix design allowances for Class H concrete and requirements for calcium nitrite corrosion inhibitors. Required for all projects using Hydraulic Cement Concrete beginning with the July 2022 letting. Use of this special provision prior to the July 2022 letting is at the District's option. Will replace 421-009 effective July 2022 letting. Replaces SP421-009 . Statewide Use.

2014 English Special Provisions by Item (Statewide & Districtwide, Current)
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