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Abbreviations:

AOP-Areas of Practice

LAR-Laws & Rules

P.E.-Professional Engineers

 

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Freeze-Thaw Resistance of Concrete with Marginal Air Content

Course No. T-3004

Credit: 3 PDH

Course Fee: $86.85 Purchase course

Subject Matter Expert: Vincent D. Reynolds, M.B.A., P.E.

 

Overview

The air content of concrete is a factor in the concrete’s durability that may also affect the service life of concrete beams, concrete pavement, etc. During the freeze-thaw cycle the air voids in concrete expand and contract. This physical cycle may lead to microcracking in the concrete. It is recommended that the air void system of concrete contain approximately 6 percent total air and a spacing factor less than 0.20 millimeters. It was observed however in laboratory studies that some concretes exhibited good freeze-thaw resistance with an air content and spacing factor outside of the accepted thresholds.

After reading this 3 hour course the student will have valuable knowledge regarding the laboratory studies and results of the freeze-thaw resistance of concrete with marginal air content. The student will also review different admixtures and their effects on the freeze-thaw resistance.

The study materials for this course are based solely on the text “Freeze-Thaw Resistance of Concrete with Marginal Air Content” as published by the United States Federal Highway Administration (FHWA)

The student must take a multiple-choice quiz consisting of fifteen (15) questions at the end of this course to earn PDH credits.

Specific Knowledge or Skill Obtained

This course teaches the following specific knowledge and skills:

  • Compare the performance of Vinsol resin and synthetic air-entraining admixtures
  • The difference between entrapped air and entrained air
  • The effects of microcracks in concrete
  • Freezing temperature of water in concrete gel
  • The effects of air voids on the freeze-thaw cycles in concrete

Course

Click on the following link to the PDF document to review the course material before taking the quiz for credit.

Freeze-Thaw Resistance of Concrete with Marginal Air Content

 

Having trouble downloading the PDF file?

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To receive PDH credit for this course, you must pass a multiple-choice quiz. Click the button below to Purchase Course and Take Quiz. To take the quiz, your computer must be set to accept cookies. See how to check your cookie settings.

 

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