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Indiana using new concrete to increase bridge life span
Purdue University research is enabling
Indiana to improve bridges in the state with anew "internally
cured" high-performance concrete.
"This material will reduce
maintenance costs and allow bridge decks to last longer," said
Jason Weiss, aprofessor of civil engineering and director of Purdue's Pankow
Materials Laboratory. "Our testing indicatesthat internally cured
high-performance concrete experiences substantially less cracking and
concretedamage caused by deicing salt and, when properly designed, the
service life of bridge decks can be greatlyextended."The Joint
Transportation Research Program, a partnership between the
Indiana Department of Transportation (INDOT) and Purdue, worked with
Weiss and INDOT to create specifications forimplementing the internally cured
high-performance concrete. It will be used on four bridges this year,
thefirst of which will be on State Road 933 in St. Joseph
County."We anticipate these relatively minor changes to our concrete
specifications to substantially extend the lifeof our bridges," said Troy
Woodruff, INDOT's chief of staff. "That means fewer traffic delays
due to bridgemaintenance and repair, and much lower expense."Jay
Wasson, INDOT deputy commissioner for engineering and asset management, said,
"This collaborationbetween Purdue and INDOT to implement the research
findings not only benefits Indiana taxpayers, butalso provides valuable
full-scale living laboratories for study by Purdue students and faculty.
As furtherfield data are collected by professor Weiss, we anticipate even
broader deployment of this concretespecification."
FUENTE: https://phys.org/
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