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Title: 92-MPA AIR-ENTRAINED HIGH-PERFORMANCE CONCRETE USING TENNESSEE MATERIALS
Accession Number: 00796890
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: An air-entrained high-performance concrete (HPC) mixture design for prestressed bridge beams was developed in an attempt to interest the Tennessee Department of Transportation. The mixture contained locally available, 19-mm maximum-size limestone as the coarse aggregate and a manufactured limestone fine aggregate. A dense, combined aggregate gradation was used to lower water demand and thus enhance durability. Type II portland cement, microsilica, and Class C fly ash were used as binder materials. The resulting w/(c + p) was 0.22. Twelve 0.028-cu m batches of the HPC were mixed for the study. The mixture design produced an average air content of 4.1% and an average slump of 72 mm. Although it contained 4.1% air, the mixture remained very dense, with an average unit weight of 2422 kg/cu m. Average compressive strengths of 72.6, 63.3, 84.8, and 92.9 MPa were achieved at simulated release and 7, 28, and 56 days, respectively. Measured static modulus of elasticity at 28 days agreed with ACI 363R-92 equations within 2%. Further, after 600 freezing and thawing cycles, the average durability factor of two prismatic specimens was 100, and visible damage was minimal.
Supplemental Notes: This paper appears in Transportation Research Record No. 1698, Concrete 2000.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Crouch, L KSauter, H JWilliams, J APagination: p. 24-29
Publication Date: 2000
Serial: ISBN: 030906676X
Features: Figures
(2)
; References
(9)
; Tables
(12)
TRT Terms: Subject Areas: Highways; Materials; I32: Concrete
Files: TRIS, TRB, ATRI
Created Date: Aug 3 2001 12:00AM
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