Blended Cements

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Blended Cements

• Indiana Department of Transportation

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How Does Your State Use Blended Cements?

• INDOT Allows
• IS, ISA, ISM, IP, AND IPA
• No Blended Cement Currently Supplied To Indiana.

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What Seasonal Limitations Does Your State Place
On the Use Blended Cements?

• May Only Be Used Between April 1st And October
  15th Of The Same Calendar Year.
• Bridge Decks Type IP
• Pavements Types IS, ISA, IP, and IPA

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How Does Your Specification Identify The
Following Characteristics of Blended Cements?

• Amount Of Cementitious Material Supplied To The
  Site
• Section 501- QC/QA PCCP
• Minimum Cement Content Increased From 440
  lb/yd3 to 500 lbs/yd3
• Section 502- PCCP
• Cement Content Increased From 564 lb/yd3
  to 598 lbs/yd3

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How Does Your Specification Identify The
Following Characteristics of Blended Cements?

• Amount Of Cementitious Material Supplied To The
  Site
• Section 702- Structural Concrete
• Cement Content Increased By a Multiplier
  of 1.06 for IP and IPA Only
• Class C Concrete from 658 lb/yd3 to 698
  lbs/yd3
• Class A Concrete 564 lb/yd3 to 598 lbs/yd3
• Class B Concrete 470 lb/yd3 to 498 lbs/yd3

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How Does Your Specification Identify The
Following Characteristics of Blended Cements?

• Chemical Quality Of Blended Material
• AASHTO M 240

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How Does Your Specification Identify The
Following Characteristics of Blended Cements?

• The exceptions to AASHTO M 240 are as follows
• The amount of pozzolan shall be limited to 20
  5 by weight of the portland-pozzolan cement for
  the types IP and IP-A.
• The pozzolan in the portland-pozzolan cements,
  types IP and IP-A, shall be in accordance with
  ASTM C 618, class C or class F with the loss on
  ignition of the pozzolan limited to a maximum of
  3.
• The pozzolan in the portland-pozzolan cements,
  types IP and IP-A, shall be interground with the
  portland cement clinker.

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How Does Your Specification Identify The
Following Characteristics of Blended Cements?

• Required Testing for Materials Certification
• Six Months of Test Data
• Detailed Quality Control Plan

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How Does Your Specification Identify The
Following Characteristics of Blended Cements?

• Changes to Materials Over Time
• ?

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Identify Problems Observed Using Blended Cements
and Problem Resolution.

• No Use
• No Problems

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Use Of Ternary Cementitious Materials

• Special Projects
• Research
• Proportions for Ongoing Research are as follows
• Total Cementitious
• Cement 390 lbs/yd, minimum
• Fly Ash 20-30, by mass
• Silica Fume 5-7, by mass

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Blended and Ternary Cement Research

• Performance Related Specifications for Concrete
  Bridge Decks
• High Performance Concrete Bridge Decks
• Goal of Research
• Narrow Cracks
• Low permeability
• Controlled Strength

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