Details:

Creators:
Castro, Javier ; Li, Wenting ; Pour-Ghaz, Mohammad ; Golias, Mike ; Tao, Bernie ; ... More +
Castro, Javier ; Li, Wenting ; Pour-Ghaz, Mohammad ; Golias, Mike ; Tao, Bernie ; Sun, Hongfang ; Weiss, W. Jason Less -
Corporate Creators:
Joint Transportation Research Program (Ind.)
Corporate Contributors:
Purdue University ; Indiana Department of Transportation
Purdue University ; Indiana Department of Transportation Less -
Subject/TRT Terms:
[+]
Absorption Acoustic Emission Tests Concrete Concrete--Indiana--Testing Deicing Esters Expansion Joints Freeze Thaw Tests Humidity Joints (Engineering) Joint Sealers Pavements Pavements--Indiana--Testing Percent Saturation Portland Cement Portland Cement--Indiana--Testing Portland Cement Concrete
Publication/ Report Number:
FHWA/IN/JTRP-2011/22
Resource Type:
Tech Report
Geographical Coverage:
Indiana
Edition:
Final report.
Corporate Publisher:
Purdue University. Joint Transportation Research Program
Abstract:
The objective of this project was to evaluate factors influencing the durability of the joints in portland cement concrete

pavement in the state of Indiana. Specifically this work evaluated the absorption of water, the absorption of deicing solutions,

the relationship between the degree of saturation and concrete deterioration, and the role of Soy Mehyl Esters as a potential

concrete sealant. The aforementioned items were studied in conjunction with the observation of premature joint deterioration

in concrete pavements. Previous work by the PI identified that deteriorating joints were observed to frequently have standing

water and damaged joint sealant. To better understand the potential mechanisms responsible for joint deterioration, a series

of mortars were tested that are consistent with the mortar fraction of concrete paving mixtures. The first portion of the work

examined the role of deicing salt solutions on the wetting and drying behavior of concrete elements (this was a joint series of

experiments with SPR 3093). It was observed that salts altered the equilibrium relative humidity of the solution, as such

concrete containing deicing solutions dried less frequently than concrete containing only pore solution. Further, it was

observed that the rate of water absorption was related to the square root of ratio of surface tension and viscosity. Salt

solutions have a slower rate of absorption than plain water. It was also observed that concrete previously exposed to deicing

salts also exhibited an altered rate of water absorption. The second portion of the work examined the concept of the degree of

saturation and its relationship with freeze-thaw damage. Specifically mortars with different air contents were examined.

Fagerlund developed a model that proposed a critical degree of saturation could be correlated with the onset of freeze-thaw

damage. The work suggests that absorption testing should be used to determine the degree of saturation which can be used to

estimate the time to reach a critical degree of saturation. Once this critical degree of saturation was reached freeze-thaw

damage was inevitable. While entrained air was observed to slow the time to reach a critical degree of saturation, this critical

degree of saturation could not be avoided. The final portion of the work examined the potential use of penetrating concrete

sealers (like soy methyl esters) to reduce water absorption and the corresponding freeze-thaw damage. While absorption

testing was able to show the benefits of sealers, differences were observed regarding the influence of sealer composition on

freeze-thaw damage.


Format:
PDF
Funding:
SPR-3200
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:6a5d7fce91d190c9e48667828447350864cb41ec8a5acce3a26c3f455267c26f
Download URL:
https://rosap.ntl.bts.gov/view/dot/24172/dot_24172_DS1.pdf
File Type:

Supporting Files

• No Additional Files

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