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Title: Performance of Low-Slump Underwater Concrete Incorporating Antiwashout Admixtures
Accession Number: 01011211
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Antiwashout admixtures (AWAs) are among the agents recently used to minimize the adverse effects associated with underwater concrete placement. However, relatively little work on the influence of AWAs on the performance of underwater concrete and evaluation of the validity of the conventional and nondestructive test methods used has been conducted. Thirty mixtures were prepared with several water-to-cementitious material ratios, admixture types, and dosages. Concrete specimens were placed in air and at two underwater depths. The testing program involved fresh and hardened concrete testing as well as nondestructive testing. A simple method was used to assess the concrete and the corrosion damage on exposure to wetting and drying cycles in aggressive saline solution. The impacts of the type and the dosage of the AWAs admixtures, mix proportions, and placement depth on fresh and hardened concrete properties are highlighted. The results suggest that the quality of the surface of underwater concrete is inferior to that of its core and that there is a need to adjust and calibrate the nondestructive testing methods when such concrete is evaluated. Underwater AWA concrete exhibited relatively high degrees of susceptibility to damage when it was exposed to saline solutions.
Monograph Title: Monograph Accession #: 01011203
Language: English
Authors: Nakhla, Dina AdelAbou-Zeid, Mohamed NagibPagination: pp 61-70
Publication Date: 2005
ISBN: 0309093872
Media Type: Print
Features: Figures
(3)
; Photos
(6)
; References
(10)
; Tables
(4)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Materials; I32: Concrete
Files: TRIS, TRB, ATRI
Created Date: Dec 16 2005 2:15PM
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