Simulation of prepackaged grout bleed under field conditions : [summary].
-
2014-04-01
Details:
-
Creators:
-
Corporate Creators:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:Post-tensioning (PT) is a method of compensating
for concrete’s weakness under tension by adding
steel. Tubes (ducts) are cast into concrete
components; after the concrete sets, high-strength steel cables (tendons or strand) are run
through the ducts, secured at both ends, and
tensioned by powerful jacks. The ducts are then
filled with PT grout, which hardens, preventing
corrosion and bonding the cables to the concrete.
PT is a very successful and widely used method.
However, its durability depends on the quality of
the grout and its installation. Since grouting is a
blind operation, some problems with grout only
become apparent years later — as soon as two
years in some cases. Voids or other irregularities in
grout distribution or setting can lead to corrosion,
which can lead to failure of the concrete
component. In this report, University of Florida
researchers focused on a problem which has been
found in several bridges in Florida, soft grout —
grout which has not hardened after many years
and is often associated with corrosion.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type: