Investigation of High Performance Concrete Pavement, MLR-05-01, 2006

(2006) Investigation of High Performance Concrete Pavement, MLR-05-01, 2006. Transportation, Department of

pdf
Preview
PDF
IADOT_mlr_05_01_Investigation_High_Performance_Concrete_Pavement_2006.pdf

File Size:355kB

Abstract

The Iowa DOT has been using blended cements in ternary mixes since 1999. Use of these supplementary cementitious materials gives concrete with higher strengths and much lower permeability. Use of these materials has been incorporated for use in High Performance Concrete (HPC) decks to achieve lower permeability and thus long term performance. Since we have been using these materials in paving, it would be informative to determine what concrete pavement properties are enhanced as related to high performance concrete. The air void system was excellent at a spacing factor of 0.0047 in (0.120 mm). AVA spacing factor results are much higher than the hardened air void analysis. Although only 3 samples were tested between the image analysis air content and the RapidAir457, there is pretty good agreement between those test methods. Air void analysis indicates that excessive vibration was not required to place the concrete. Vibration was well within the specification limits with an average of 6683 vpm’s with a standard deviation of 461. Overall ride of the project was very good. The average smoothness for the project was 2.1 in/mile (33.8 mm/km). The International Roughness Index (IRI) was 81 in/mi (1.29 m/km). The compressive strength was 6260 psi (43.2 MPa) at 28 days and 6830 (47.1 MPa) at 56 days. The modulus of rupture by third point loading (MOR-TPL) tested at 28 days was 660 psi (4.55 MPa). The AASHTO T277 rapid chloride permeability results at 28 days using the Virginia cure method correlate fairly well with the 56 and 90 day results with standard curing. The Virginia cure method 28 day results were 2475 coulombs and the standard cure 56 and 90 day test results were 2180 and 2118, respectively.

Item Type: Departmental Report
Keywords: Air voids, Blending, Concrete pavements, High performance concrete, Instruments for measuring roughness, Smoothness
Subjects: Transportation > Pavements
Transportation > Pavements > Concrete
Transportation
Transportation > Materials
Transportation > Design and Construction
Transportation > Maintenance and preservation
ID Code: 19908
Deposited By: Iowa DOT Library
Deposited On: 24 Jun 2015 17:10
Last Modified: 24 Jun 2015 17:10
URI: http://publications.iowa.gov/id/eprint/19908