Prediction of Freeze-Thaw Durability of Concrete
The AASHTO T 161 (ASTM C666) durability factor (DF) is used for evaluation and acceptance of aggregates and is being considered as an end-result performance specification criterion for evaluation of pavement concrete. However, the test method duration is lengthy. In a three-phase project, a method of shorter duration has been developed for the prediction of DF based primarily on aggregate testing. Thirty-two ledge/quarry/geologic formations were subjected to 21 test methods that reflected the major failure mechanisms of frost susceptibility (D-cracking). The DFs ranged from 28 to 98 and nominal maximum aggregate sizes were 3/8 to 1 in. (9.5 to 25 mm). Multiple linear regressions were used to produce several alternate models of varying accuracy and complexity for DF prediction. The models were validated with a separate dataset. As an alternate to the predictive models, a threshold-limits method was also developed based on the combined dataset plus 38 additional aggregates.
D. N. Richardson and S. M. Lusher, "Prediction of Freeze-Thaw Durability of Concrete," ACI Materials Journal, vol. 112, no. 3, pp. 439-450, American Concrete Institute (ACI), May 2015.
The definitive version is available at https://doi.org/10.14359/51687364
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Concrete aggregates; Concretes; Durability; Forecasting; Freezing; Testing; Thawing; Freezing and thawing durability; Freezing and thawing resistance; Frost susceptibility; Maximum aggregate sizes; Multiple linear regressions; Pavement concrete; Performance specifications; Three-phase projects; Aggregates; Durability; Freezing-And-Thawing Resistance
International Standard Serial Number (ISSN)
Article - Journal
© 2015 American Concrete Institute (ACI), All rights reserved.
01 May 2015