Nondestructive quality assessment of asphalt pavements based on dynamic modulus

2016 ◽  
Vol 112 ◽  
pp. 836-847 ◽  
Author(s):  
Shibin Lin ◽  
Jeramy C. Ashlock ◽  
R. Christopher Williams
Keyword(s):  
Quality Assessment ◽  
Dynamic Modulus ◽  
Asphalt Pavements ◽  
Nondestructive Quality

Spectroscopy, Microscopy and Fluorescence Imaging ofOriganum vulgareL. Basis for Nondestructive Quality Assessment

2013 ◽  
Vol 89 (6) ◽  
pp. 1383-1390 ◽  
Author(s):  
Johanna M. Novo ◽  
Analia Iriel ◽  
María Claudia Marchi ◽  
María Gabriela Lagorio
Keyword(s):  
Quality Assessment ◽  
Fluorescence Imaging ◽  
Nondestructive Quality

scholarly journals Application of FWD data in developing dynamic modulus master curves of in-service asphalt layers

2017 ◽  
Vol 23 (5) ◽  
pp. 661-671 ◽  
Author(s):  
Nader SOLATIFAR ◽  
Amir KAVUSSI ◽  
Mojtaba ABBASGHORBANI ◽  
Henrikas SIVILEVIČIUS
Keyword(s):  
Dynamic Modulus ◽  
Master Curve ◽  
Asphalt Pavements ◽  
Falling Weight Deflectometer ◽  
Master Curves ◽  
Simple Method ◽  
High Frequencies ◽  
Design Guide ◽  
Falling Weight

This paper presents a simple method to determine dynamic modulus master curve of asphalt layers by con­ducting Falling Weight Deflectometer (FWD) for use in mechanistic-empirical rehabilitation. Ten new and rehabilitated in-service asphalt pavements with different physical characteristics were selected in Khuzestan and Kerman provinces in south of Iran. FWD testing was conducted on these pavements and core samples were taken. Witczak prediction model was used to predict dynamic modulus master curves from mix volumetric properties as well as the bitumen viscosity characteristics. Adjustments were made using FWD results and the in-situ dynamic modulus master curves were ob­tained. In order to evaluate the efficiency of the proposed method, the results were compared with those obtained by us­ing the developed procedure of the state-of-the-practice, Mechanistic-Empirical Pavement Design Guide (MEPDG). Re­sults showed the proposed method has several advantages over MEPDG including: (1) simplicity in directly constructing in-situ dynamic modulus master curve; (2) developing in-situ master curve in the same trend with the main predicted one; (3) covering the large differences between in-situ and predicted master curve in high frequencies; and (4) the value obtained for the in-situ dynamic modulus is the same as the value measured by the FWD for a corresponding frequency.

scholarly journals Quality Determination of Red Radish by Nondestructive Root Color Measurement

2003 ◽  
Vol 128 (3) ◽  
pp. 397-402 ◽  
Author(s):  
Monika Schreiner ◽  
Angelika Krumbein ◽  
Ilona Schonhof ◽  
Stefanie Widell ◽  
Susanne Huyskens-Keil
Keyword(s):  
Quality Assessment ◽  
Raphanus Sativus ◽  
Reliable Indicator ◽  
Color Measurement ◽  
New Approach ◽  
Textural Characteristics ◽  
Hue Angle ◽  
Nondestructive Quality ◽  
Red Radish

A new approach for nondestructive quality assessment based on color measurement was developed for red radishes (Raphanus sativus L.). Postharvest changes in hue angle corresponded with changes in soluble and insoluble pectic substances linked to textural characteristics in `Nevadar' radishes. Changes in glucosinolates were related to changes in chroma and were associated with radish flavor. However, monosaccharides were not related to root color during the 4 days of postharvest period. Nevertheless, the data suggest that root color may be used as a rapid, inexpensive and reliable indicator of quality during the postharvest distribution of radish.

Effects of Conductive Fillers on the Dynamic Response and Fatigue life of Conductive Asphalt Concrete

2007 ◽  
Vol 348-349 ◽  
pp. 145-148 ◽  
Author(s):  
Shao Peng Wu ◽  
Bo Li ◽  
Jian Qiu ◽  
Ning Li
Keyword(s):  
Fatigue Life ◽  
Asphalt Concrete ◽  
Dynamic Modulus ◽  
Load Cycle ◽  
Initial Crack ◽  
Asphalt Pavements ◽  
Negative Effects ◽  
Cycle Times ◽  
Dynamic Modulus Test ◽  
Conductive Fillers

It is currently interesting to use thermal or electrical conductive asphalt concrete for snow-melting and maintenance of asphalt pavements in winter. The addition of conductive fillers may have negative effects on the mechanical properties of asphalt concrete. The performance of conductive asphalt concrete is greatly affected by the initial crack and its propagation. Laboratory tests for neat and conductive asphalt concrete include Dynamic Modulus Test (DMT) and Indirect Tensile Fatigue Test (ITFT). DMT tests indicates that the value of dynamic modulus of asphalt concrete decreases with the increasing graphite content. It means that the conductive asphalt concrete achieves lower stiffness. It can be concluded from ITFT tests that the fatigue life (load cycle times) of conductive asphalt concrete is more than neat ones when stress level is under 1.0 MPa. Meanwhile higher fatigue resistance of conductive asphalt concrete is observed when carbon fibers (2 weight % of total aggregate) were added together with 22% graphite, especially at low stress levels.

Evaluation of three nondestructive testing techniques for quality assessment of asphalt pavements

2018 ◽  
Vol 33 (4) ◽  
pp. 361-375 ◽  
Author(s):  
Shibin Lin ◽  
Jeramy Ashlock ◽  
R. Christopher Williams ◽  
Hosin David Lee ◽  
Yujin Wang
Keyword(s):  
Nondestructive Testing ◽  
Quality Assessment ◽  
Asphalt Pavements ◽  
Testing Techniques

Damage Assessment for ME Rehabilitation Design of Modified Asphalt Pavements: Challenges and Findings

2018 ◽  
Vol 2672 (40) ◽  
pp. 228-241 ◽  
Author(s):  
Jhony Habbouche ◽  
Elie Y. Hajj ◽  
Peter E. Sebaaly ◽  
Nathan E. Morian
Keyword(s):  
Dynamic Modulus ◽  
Hybrid Approach ◽  
Testing Temperature ◽  
Asphalt Pavements ◽  
Loading Frequency ◽  
Modified Asphalt ◽  
Core Samples ◽  
Design Software ◽  
Polymer Modified Asphalt ◽  
Pavement Me Design

The overall objective of this study was to assess the use of Level 1 analysis for mechanistic-empirical (ME) rehabilitation designs of deteriorated polymer-modified asphalt concrete (AC) pavements in Nevada using the AASHTOWare® Pavement ME software. This research also explored the possible implementation of a hybrid approach for AC damage characterization to overcome the challenges associated with the use of the Witczak model for estimating the undamaged dynamic modulus master curve of the existing AC layer. Two rehabilitation field projects were used as part of this study. The experimental plan involved falling weight deflectometer (FWD) testing in the right wheelpath before rehabilitation, analysis of core samples, estimation of an equivalent undamaged dynamic modulus, and estimation of equivalent damaged dynamic modulus from FWD backcalculation. The proposed hybrid approach consisted of conducting laboratory dynamic modulus testing on the collected core samples and estimating an equivalent undamaged dynamic modulus at the same FWD testing temperature and loading frequency. The pre-overlay damage, characterized based on the approach in Pavement ME Design software (i.e., using a Witczak prediction model and backcalculated modulus), showed overly high values that did not match with the collected pre-overlay distress data on either of the rehabilitation projects. Based on the findings from this study, the hybrid approach was recommended for implementation by Nevada Department of Transportation (NDOT) when designing AC overlay over polymer-modified asphalt pavements in Nevada. Recommendations for user inputs were also provided for future consideration in Pavement ME Design software.

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