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Service Life Of Prestressed High-Strength Concrete Pile In Marine Environment Considering Effects Of Concrete Stratification And Temperature, Lin Li, Weibing Gong, Jingpei Li
Service Life Of Prestressed High-Strength Concrete Pile In Marine Environment Considering Effects Of Concrete Stratification And Temperature, Lin Li, Weibing Gong, Jingpei Li
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Prestressed high-strength concrete (PHC) piles have advantages of light weight and high load carrying capacity, which have been widely applied in coastal and offshore engineering. However, PHC piles serving in the coastal or offshore regions have already undergone severe durability problem. This paper presents a comprehensive method for predicting the service life of PHC piles in the marine environment, which reasonably takes the temperature effects and the concrete stratification caused by centrifugation of PHC piles into account. The pile service life is divided into the diffusion and corrosion periods. The service life of the diffusion period is predicted by solving …
Methods For Predicting Shale Durability In The Field, Paul Michael Santi, Jerry D. Higgins
Methods For Predicting Shale Durability In The Field, Paul Michael Santi, Jerry D. Higgins
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Durability of shales and other weak rock is an important parameter describing the material's susceptibility to breakdown upon exposure to water or during construction work. While laboratory methods have been developed to measure durability, no correlations between laboratory results and simple field tests have been determined. The results of this study show that certain field parameters can predict slake durability with acceptable accuracy. The recommended field tests, in order of desirability, are slake index, jar slake, hammer rebound, and NGI "Q" value. Single variable and multiple variable linear regression equations are given, including equations conservatively modified so that 95% of …
Improving The Jar Slake, Slake Index, And Slake Durability Tests For Shales, Paul M. Santi
Improving The Jar Slake, Slake Index, And Slake Durability Tests For Shales, Paul M. Santi
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
This study proposes modifications to three shale durability tests to improve reproducibility, reduce the level of effort required, and better correlate the test to actual slaking characteristics. Modifications to the jar slake test reduced test variability by one-third, offering a substantial improvement in consistency, with only a slight loss in the ability of the test to predict slake durability. Analysis showed that slake index test error could be reduced or at least pinpointed by testing groups of samples, rather than single samples. Furthermore, the wet-sieving procedure should be more carefully defined. Analysis of correlations between single- and multiple-cycle slake durability …