Deleted Journal, Journal Year: 2025, Volume and Issue: 2(1)

Published: May 1, 2025

Abstract Post-tensioned (PT) structures face critical durability challenges related to grout deficiencies, particularly concerning water segregation and solute transport at elevated heights. This study investigates the effects of hydrostatic pressure on in PT systems using modified Schupack tests. Three types (two commercial grouts one neat cement grout) were evaluated under varying conditions: constant (50 PSI) with different contents, pressures (10–100 fixed content. Results demonstrate that significantly influences separation, bleed volumes increasing proportionally across all types. Commercial maintained relatively low (≤1.5%) compared (>25%) higher pressures. At maximum 100 PSI, exhibited bleeding rates 27.8%, while Grout A B stability 1.4% 1.2% respectively. Notably, sulfate a complex relationship pressure, peaking approximately 50 PSI (equivalent ~120 ft elevation) before declining For 30% additional water, concentrations peaked (2800 ppm for A) 1950 PSI. These findings suggest implementing staged grouting procedures intermediate anchorages every exceeding 120 height, maintaining strict content control within ±2% manufacturer specifications. The results provide practical guidance construction, significant vertical deviations, highlight need specialized consideration applications height.

Language: Английский