Table of Contents June 1998

Pozzolans, pH and Rebar Corrosion

Pozzolans are known to reduce the pH of concrete. Does this reduction increase the likelihood of rebar corrosion problems or have any other negative effect on durability?

Type I Plus Class F Ash Instead of Sulfate-Resistant Cement?

If ASTM Type II or V cement is specified, can Type I cement plus Class F fly ash be used instead?

Determining Causes of Concrete Cracking

I do a lot of troubleshooting on residential concrete flatwork -- mainly sidewalks or driveways. Is there a way to tell the difference between structural cracking caused by overload or soil movement, and nonstructural cracking caused by volume changes related to drying shrinkage or thermal...

Giving Dispatchers Some Playback

Redesigning the Process to Work for You

Acid-Resistant Precast Concrete Allows Market Entry

Blending Fly Ash for a Better Concrete

Longer Life for Concrete Bridges