Evaluating the Effect of Heating Cooling Cycle on the Clay-Concrete Pile Interface

Document Type

Conference Proceeding

Publication Date

1-1-2022

Abstract

This study investigated the effect of applying a one heating-cooling cycle on the interface strength parameters of saturated clay soil-concrete, and the potential use of heating to improve the pile capacity. A large direct shear test device with inner dimensions of 300 mm, 300 mm, and 200 mm for width, length, and height, respectively, was modified to perform the soil-concrete interface tests. The experimental tests were conducted on low-plasticity soil with PI = 12, medium-plasticity soil with PI = 29, and high-plasticity soil with PI = 60. Two specimens at different testing temperatures (~20°C and 70°C) were tested for each normal stress and clay type under different normal stresses ranging from 30 to 150 kPa. The specimens' temperature was increased gradually during the heating process from room temperature (~20°C) to ~70°C. The specimens were then cooled back to room temperature. The test results showed significant increase in both the peak and at large displacement interface friction angles by a percent ranges from 13.6% to 35.5%.

Publication Source (Journal or Book title)

Geotechnical Special Publication

First Page

50

Last Page

58

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