Problems with corrosion of prestressing steel in post-tensioned structures
due to inadequate grouting in the past have become more apparent in recent
years. To improve grouting practices a series of fresh property tests, acce
lerated corrosion tests, simulated field testing, and long-term corrosion t
esting were used in this study to develop optimum grouts for post-tensionin
g Grouts possessing adequate workability and bleed resistance were tested i
n art accelerated corrosion test to evaluate relative corrosion protection
properties. This paper focuses on the accelerated corrosion test results. T
he most promising of these grouts were then tested for placeability under s
imulated field conditions. A fly ash grout and a thixotropic grout are reco
mmended from this testing program. Additionally, an important benefit from
this testing was fluidity, bleed and corrosion resistance data acquired for
a number of different combinations of pozzolans and admixtures.