Performance of Prestressed Girders Cast with LWSCC: Part II

Bymaster, Jared C.; Hale, W. Micah

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Performance of Prestressed Girders Cast with LWSCC: Part II

2012-08-01
By Bymaster, Jared C. ; Hale, W. Micah

File Language:

English

Details

Creators:

Bymaster, Jared C. ; Hale, W. Micah
Corporate Creators:

Mack-Blackwell National Rural Transportation Study Center (U.S.)
Corporate Contributors:

United States. Department of Transportation. University Transportation Centers (UTC) Program
Subject/TRT Terms:
Publication/ Report Number:

MBTC DOT 3030
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Dept. of Transportation. Research and Special Programs Administration
Abstract:

While much research has been performed on lightweight concrete and self-consolidating concrete (SCC), the knowledge of prestress losses in lightweight self-consolidating concrete (LWSCC) is still limited. LWSCC has the benefits of increased flowability, reduced placement labor, and decreased shipping cost compared to conventional concrete. This research program included the study of 14 SCC beams cast with expanded clay, expanded shale, and limestone aggregates. Strains in the beams were measured with vibrating-wire strain gages, and the measured prestress losses were compared with current AASHTO methods for calculating prestress losses. The AASHTO approximate method better predicted actual losses than did the AASHTO refined method. In addition, the AASHTO approximate method gave more accurate results for the LWSCC beams than it did for the normal-weight SCC beams. This research showed that the AASHTO refined method is overly sensitive to the concrete compressive strength and modulus of elasticity at release.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/25756/dot_25756_DS1.pdf
File Type:

[PDF - 1.46 MB]
Collection(s):

University Transportation Centers ; US Transportation Collection
Main Document Checksum:

urn:sha-512:874451de8d186b59c88a39f4fe826a082cb07cd1a50ae6ea1d665a934aa5e60338af53f2c5ba64e5853a02b1917b8649404de0b1b38d42d9bd12fbdc6e69f7f0

File Language:

English

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