The Prediction of LWST Values from DFT and CTM Measurements
Journal: Jordan Journal of Civil Engineering (JJCE) (Vol.9, No. 4)Publication Date: 2015-10-01
Authors : Mohammad Khasawneh;
Page : 487-498
Keywords : Friction; Texture; International Friction Index (IFI); Regression; Linear; Nonlinear.;
Abstract
The objective of this work is to develop statistical models to predict Locked Wheel Skid Trailer (LWST) skid numbers from Dynamic Friction Tester (DFT) and Circular Texture Meter (CTM) measurements conducted on asphalt pavement surfaces. The analyses conducted are descriptive as well as analytical. They include all descriptive measures along with linear and nonlinear regressions. For both analyses, DFT measurements at 20 km/h (12.5 mph) and 64 km/h (40 mph) and Mean Profile Depth (MPD) were used to predict LWST skid values. Furthermore, the International Friction Index (IFI) parameters (F60 and SP) were used in an additional analysis to predict LWST skid values. Multiple linear regression techniques were used to identify the significant quantitative predictors. Model selection using stepwise regression showed that DFT64 and MPD are statistically significant predictors. Moreover, regression analysis showed that DFT20 is highly correlated with other predictors and therefore removed due to multicollinearity. Additionally, it was shown that F60 and SP are also significant in predicting the dependent variable with slightly less correlation coefficients. Nonlinear regression technique was also utilized for the same purpose. In both cases, higher correlation coefficients were noticed when using the nonlinear method as opposed to the multiple linear regression method.
Other Latest Articles
- Mechanical Behavior of Compacted and Stabilized Clay with
- Effect of Bagasse Ash on Some Engineering Properties of Lateritic Soil
- Runoff Estimation and Identification of Water Harvesting Structures for Groundwater Recharge Using Geo - Spatial Techniques
- A Study on Correlation between Safety Factor of Pile - Slope Systems and Seismically Induced Displacements of Pile Groups
- Cancer Stem- Like Cells in Melanoma Progression, Resistance and Recurrence: Significance for Melanoma Treatment
Last modified: 2015-10-16 01:31:10