Correlation of Superpave G*/Sin δ with Rutting Test Results from Accelerated Loading Facility

1998 ◽  
Vol 1630 (1) ◽  
pp. 53-61 ◽  
Author(s):  
James A. Sherwood ◽  
Nathaniel L. Thomas ◽  
Xicheng Qi
Keyword(s):  
Data Analysis ◽  
Predictive Models ◽  
Laboratory Tests ◽  
Fatigue Cracking ◽  
Full Scale ◽  
Test Results ◽  
Testing Facility ◽  
Pavement Testing ◽  
Analysis System ◽  
Highway Research

In 1992, FHWA initiated a Superpave validation study by utilizing the Accelerated Loading Facility (ALF) at the Turner-Fairbank Highway Research Center in McLean, Virginia. The study focused on the validation of the concepts, tests, and predictive models underlying the Superpave binder specifications and mixture analysis system. Twelve full-scale pavement lanes with 48 test sites were constructed at the FHWA Pavement Testing Facility in 1993. Pavement testing with the ALF started in late spring of 1994. The results of accelerated full-scale pavement tests in conjunction with extensive laboratory tests will be used to validate the Superpave binder parameters for rutting and fatigue cracking. Presented in this paper are the results of rutting tests and some of the data analysis completed through June 1997.

Analysis of Pavement Rutting Data from FHWA Pavement Testing Facility Superpave Validation Study

1997 ◽  
Vol 1590 (1) ◽  
pp. 80-88 ◽  
Author(s):  
Ramon F. Bonaquist ◽  
Walaa S. Mogawer
Keyword(s):  
Research Program ◽  
Fatigue Cracking ◽  
Heavy Vehicle ◽  
Full Scale Test ◽  
Program Staff ◽  
Vehicle Loading ◽  
Testing Facility ◽  
Scale Test ◽  
Pavement Testing ◽  
Highway Research

Since 1986, FHWA has been performing accelerated pavement tests at its Pavement Testing Facility (PTF) located on the grounds of the Turner-Fairbank Highway Research Center. At this laboratory, FHWA uses two accelerated loading facility pavement testing machines to simulate the effects of heavy vehicle loading on full-scale test pavements. In 1992, FHWA, with help from Strategic Highway Research Program staff and contractors, started an experiment to validate selected aspects of the Superpave binder specification using accelerated pavement tests. Twelve test lanes with 48 individual test sites were constructed at the PTF in 1993. The results of accelerated pavement tests on these pavements will be used to validate the Superpave binder parameters for rutting and fatigue cracking.

scholarly journals Analytical Model for Predicting the UCS from P-Wave Velocity, Density, and Porosity on Saturated Limestone

2019 ◽  
Vol 9 (23) ◽  
pp. 5265 ◽  
Author(s):  
González ◽  
Saldaña ◽  
Arzúa
Keyword(s):  
Wave Velocity ◽  
Predictive Models ◽  
Laboratory Tests ◽  
Ultrasonic Pulse ◽  
P Wave ◽  
Test Results ◽  
Regression Analyses ◽  
P Wave Velocity ◽  
Dry Conditions ◽  
Engineering Projects

Rock mechanics and rock engineering projects require determining, among other parameters, the uniaxial compressive strength (UCS) of rock. For such a purpose, it is not uncommon to perform ultrasonic pulse laboratory tests. Many researchers have found experimental relationships between strength and P-wave velocity, but these relationships are based mainly on dry conditions and without considering any other physical or chemical characteristics of the studied rock. Specifically, for limestone, there are 11 correlations reported in the literature, eight of which are simple and the remaining three are multiple, and, among the latter, only two of them consider the saturation. In order to evaluate the combined effect of P-wave velocity, density, and porosity on the UCS of saturated limestone, simple and multiple regression analyses were carried out on the test results of 13 saturated limestone specimens to determine the parameters of both previously mentioned predictive models. The results showed that density is not correlated with strength.

Experimental study of the strength and durability of metal-composite high-pressure tanks

2019 ◽  
Vol 85 (1(I)) ◽  
pp. 49-56 ◽  
Author(s):  
A. M. Lepikhin ◽  
V. V. Moskvichev ◽  
A. E. Burov ◽  
E. V. Aniskovich ◽  
A. P. Cherniaev ◽  
...  
Keyword(s):  
High Pressure ◽  
Strain State ◽  
Full Scale ◽  
Fracture Mechanisms ◽  
Metal Composite ◽  
Test Results ◽  
Stress Strain ◽  
Pneumatic Pressure ◽  
Stress Strain State ◽  
Composite Tank

The results of unique experimental studies of the strength and service life of a metal-composite high-pressure tank are presented. The goal of the study is to analyze the fracture mechanisms and evaluate the strength characteristics of the structure. The methodology included tests of full-scale samples of the tank for durability under short-term static, long-term static and cyclic loading with internal pneumatic pressure. Generalized test results and data of visual measurements, instrumental and acoustic-emission control of deformation processes, accumulation of damages and destruction of full-scale tank samples are presented. Analysis of the strength and stiffness of the structure exposed to internal pneumatic pressure is presented. The types of limiting states of the tanks have been established experimentally. Change in the stress-strain state of the tank under cyclic and prolonged static loading is considered. Specific features of the mechanisms of destruction of a metal-composite tank are determined taking into account the role of strain of the metal liner. The calculated and experimental estimates of the energy potential of destruction and the size of the area affected upon destruction of the tank are presented. Analysis of test results showed that the tank has high strength and resource characteristics that meet the requirements of the design documentation. The results of the experiments are in good agreement with the results of numerical calculations and analysis of the stress-strain state and mechanisms of destruction of the metal-composite tank.

PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBASIS ADOBE FLASH CS3 PROFESSIONAL PADA MATERI PENYAJIAN DATA

2020 ◽  
Vol 2 (2) ◽  
pp. 70-76
Author(s):  
Savitri Septiara Pratiwi ◽  
Ana Setiani ◽  
Novi Andri Nurcahyono
Keyword(s):  
Data Analysis ◽  
Junior High School ◽  
Random Sampling ◽  
Interactive Learning ◽  
Simple Random Sampling ◽  
Mathematical Understanding ◽  
Test Results ◽  
Analysis Techniques ◽  
Adobe Flash ◽  
Is Research

The purpose of this research are : 1) knowing the process of developing interactive with using Adobe Flash CS3 Professional media, 2) knowing the effectiveness of interactive learning with using Adobe Flash CS3 Professional media, 3). knowing the ability of students' mathematical understanding after using the Adobe Flash CS3 Professional media. The type of research is Research and Development (R & D) with One-Group Pretest-Posttest. The research was conducted at Mardi Waluya 2 Sukabumi Junior High School in the 2018/2019 semester event. The writer take the population of this study is on VII class. The sample used simple random sampling and for the instruments used were validation questionnaires media and tests. Data analysis techniques are using the Likert scale for validation questionnaires media, using the T test to determine effectiveness, and N-Gain to determine the increase in students' mathematical understanding skills. Interactive learning media are valued by media experts and material experts, with the results obtained that are valid so that they can be used in learning. The results of the effectiveness test are Thit (8.78)> T table (1,699) with a significant level used which is 5%. With high criteria of N-Gain test results are 75.61. Based on the results of these studies, interactive learning with using Adobe Flash CS3 Professional media can be effective in learning and can improve students' of mathematical understanding skills.

Sign in / Sign up

Export Citation Format

Share Document