Details:

Creators:
Lindquist, Will ; Darwin, David ; Browning, JoAnn
Lindquist, Will ; Darwin, David ; Browning, JoAnn Less -
Corporate Creators:
Kansas. Dept. of Transportation. Bureau of Materials & Research
Corporate Contributors:
University of Kansas
Subject/TRT Terms:
[+]
Concrete Bridges Pavements Reinforced Concrete Bridge Decks Cracking Of Concrete Pavements High Performance Concrete
Publication/ Report Number:
FHWA-KS-09-5
Resource Type:
Tech Report
Geographical Coverage:
Kansas
Edition:
Summary
Corporate Publisher:
Kansas. Dept. of Transportation. Bureau of Materials & Research
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and StructuresNTL-HIGHWAY/ROAD TRANSPORTATION-Construction and MaintenanceNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance
Abstract:
The development and evaluation of low-cracking high-performance concrete (LC-HPC) for use in bridge decks

is described based on laboratory test results and experience gained during the construction of 14 bridges. This report

emphasizes the material aspects of the construction process; a companion report will provide a detailed discussion of the

construction, design, and environmental factors affecting the performance of LC-HPC bridge decks.

The KU Mix design methodology for determining an optimized combined gradation uses the percent retained chart and

the Modified Coarseness Factor Chart. The process begins by developing an ideal gradation followed by the determination of

an optimum blend of user-selected aggregates. A Microsoft® Excel workbook enhanced with Visual Basic for Applications

is available to perform the optimization process at www.iri.ku.edu.

The second portion of the study involves evaluating the effect of paste content, water-cement (w/c) ratio, coarse

aggregate type, mineral admixture type (silica fume, slag cement, and Class F fly ash each at two levels of replacement),

cement type and fineness, a shrinkage reducing admixture, and the duration of curing on the free-shrinkage characteristics

of concrete mixtures in the laboratory tested in accordance with ASTM C 157.

The final portion of the study presents the specifications, construction experiences, and the preliminary evaluation of

14 LC-HPC bridge decks that have been built or are planned in Kansas. The techniques used to reduce cracking in these

bridge decks are presented, and the field experiences for the 18 individual LC-HPC placements completed to date are

presented. The results indicate that LC-HPC decks with an optimized aggregate gradation and design w/c ratios of 0.44 and

0.45 with cement contents of 317 and 320 kg/m3 (535 and 540 lb/yd3) have more than adequate workability, finishability,

and pumpability, in addition to reduced cracking. A preliminary evaluation of these decks indicates that, on average, the

LC-HPC decks are performing at a level approximately equal to or exceeding the best performing monolithic decks in

Kansas surveyed over the past 15 years.


Format:
PDF
Funding:
C1465
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:7e52f0af7be80d3514ef942427e1ea16bccf40c94d04cb3fddb8c502a97fc8da
Download URL:
https://rosap.ntl.bts.gov/view/dot/16822/dot_16822_DS1.pdf
File Type:

Supporting Files

• No Additional Files

More +