01660861

Component

Freeze thaw damage in concrete structures is a serious issue for infrastructure in cold regions. Accurate detection of this type of damage at early stages allows for the selection of optimum strategies for preservation and rehabilitation activities. This paper explores the feasibility of utilizing ultrasonic shear wave technology for quantification of damage in concrete slabs, which could be successfully applied for the detection of freeze thaw damage. Four slabs with varying levels of freeze thaw damage were tested and two analysis techniques were developed to characterize the damage present. These methods involve the formulation of reconstructions to analyze the subsurface condition, as well as the creation of a numerical index based upon recorded signal characteristics. The results of both analyses showed agreement both with each other and with the visual survey assessments. However, the methods were able to detect damage in portions of the slab where no visual cracks were observed. These techniques showed promise for an accurate nondestructive quantification of the extent of freeze thaw damage, or similar damage manifestations, in concrete structures.

This paper was sponsored by TRB committee AFN30 Standing Committee on Durability of Concrete. Alternate title: Non-Destructive Analysis of Freeze–Thaw Damage in Concrete Slabs Using Shear Waves

18-00614

English

8p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References

Concrete structures; Deterioration by environmental action; Freeze thaw durability; Frigid regions; Nondestructive tests; S waves; Slabs

Highways; Hydraulics and Hydrology; Maintenance and Preservation; Materials; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-00614

TRIS, TRB, ATRI

Jan 8 2018 10:10AM