Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 37 for “"moisture damage"”.
-
PERMEABILITY AND MOISTURE DAMAGE CHARACTERISTICS OF ASPHALT PAVEMENTS
… studies have been conducted on the topics of moisture damage and permeability, but very few studies have correlated permeability with moisture damage in Asphalt Concrete (AC). This study evaluates whether such a relation exists or not. In addition, correlations of permeability with AC mix …
-
Nano-scale evaluation of moisture damage in asphalt
Moisture damage is one of the major problems of asphalt pavements in United States. The moisture damage problem in asphalt has been studied for decades; still it remains an unsolved problem. Traditional macro-scale tests and methods failed to describe how and what factors affect moisture damage …
-
On Dynamic Modulus of Asphalt Concrete for Moisture Damage
… method nor the MEPDG uses E* value to evaluate moisture damage characteristics of HMA pavements. In fact, moisture damage is a very complex problem, and there exists no models for inclusion in the MEPDG for predicting moisture damage performance of HMA pavements. Rather, moisture damage …
-
Reducing Moisture Damage in Asphalt Mixes Using Recycled Waste Additives
… pavements can help strengthen and reduce asphalt moisture damage. Also, dynamic shear rheometer tests show that these additives have a stiffening effect on asphalt binder. Moisture related damage is considered one of the main causes of asphalt pavement failure. As water infiltrates a layer of …
-
Mechanical and surface free energy characterization of asphalt concrete for moisture damage detection
Moisture damage is defined as the degradation of the mechanical properties of asphalt concrete (AC) caused by moisture. Moisture damage causes a severe loss in the strength and durability of asphalt pavements, leading to a major decrease in pavement performance. Hence, many additives are used to …
-
Evaluation of Warm Mix Additives for Use in Modified Asphalt Mixtures: Phase I
… asphalt mixtures from Nevada and California: moisture damage, performance characteristics, and mechanistic analysis.In Phase I of this research effort, mixture resistance to moisture damage was evaluated using the indirect tensile test and the dynamic modulus at multiple freeze-thaw cycles. …
-
Comparative Evaluation of Field and Laboratory-Produced Foamed Asphalt Mixture from Reno, Nevada
… mixtures were evaluated for their resistance to moisture damage by means of measuring the dynamic modulus |E*| and the indirect tensile strength as a function of multiple freeze-thaw cycling. The resistance of the mixtures to permanent deformation was evaluated through the use of the repeated …
-
Comprehensive Evaluation of Asphalt Mixtures in Arid Climatic conditions
… sweep rutting (SSR), at unconditioned (UC) and moisture-conditioned states at one freeze-thaw cycle (1-C) and three freeze-thaw cycles (3-C). The TSR, HWTT, and E* were performed for both the asphalt mix designs. However, the CF and SSR tests were only performed for the Superpave mix design …
-
Laboratory Evaluation of Warm Mix Asphalt Mixtures in South Dakota, USA
… research suggests WMA may be more susceptible to moisture damage and rutting than traditional HMA mixtures.The objective of this research was to evaluate various types of WMA paving technologies relative to HMA mixtures to determine their suitability for use in South Dakota in various …
-
The Use of Atomic Force Microscopy in Evaluating Warm Mix Asphalt
… force microscopy (AFM) was used to investigate moisture damage and the healing characteristics of warm mix asphalt (WMA) and compare it to those of hot mix asphalt (HMA) at the nano-scale level. Furthermore, AASHTO T 283 test method was used to evaluate moisture damage in WMA and HMA mixtures at …
-
Analysis of Fine Asphalt Concrete Mixture Gradations from Various Sources to Enhance Durability
… have lower air void content and therefore higher moisture damage resistance. This is because the finer aggregates tend to fill the voids that were otherwise not filled by the coarse aggregates. This will lead to enhanced durability because less water and air can penetrate the mix, leading to less …
-
Assessment of Antistripping Agents on Adhesion of Damaged Asphalt by Neural Network
… to quantify nano-level adhesion force of moisture damaged asphalt binder using Atomic Force Microscopy (AFM) test data. AFM data contains five point force-distance values determined for some specific asphalt chemical functional groups. Asphalt binder samples contain different types and …
-
Laboratory assessment of asphalt concrete durability utilizing balance mix design
… Test (HWTT). Additionally, mix stiffness and moisture damage susceptibility were evaluated using the output data from I-FIT and HWTT, respectively. The tests results were analyzed using the Illinois Balance Mix Design (I-BMD) approach to evaluate the tradeoffs between flexibility and rutting …
-
Evaluation of Nevada's Warm Mix Asphalt Mixtures with Recycled Asphalt Pavements
… satisfied all the criteria for resistance to moisture damage with or without RAP for all the aggregate sources used. In terms of fatigue, the WMA mixtures showed better results than the HMA mixture. But for the rutting resistance all of the WMA mixtures showed lower values than the HMA …
-
Response of Flooded Asphalt Pavement using PANDA
Moisture damage is one of the major causes of deterioration of pavements. An example is the damage caused by flooding. While the effects of pore water pressure in pavement have been studied using finite element modeling, few of the models consider a realistic moving tire and the viscoelastic …
-
Impact of Anti-Strip Additives on Performance of Asphalt Pavements
… lime and liquid are used as additives to combat moisture damage, and therefore, their impact is only evaluated with respect to their influence on the moisture sensitivity of the HMA mixture. This study extended the evaluation to cover the impact of lime and liquid additives on the structural …
-
Evaluation of the IDEAL-CT for Hveem-Designed Asphalt Mixtures in Nevada
… specimens to determine the tensile strength for moisture damage evaluation in accordance with AASHTO T 283 (tensile strength ratio, TSR). In addition, the Moisture Induced Stress Tester (MiST) was examined as a potential alternative for the freeze-thaw cycle of moisture-conditioned specimens. As …
-
Impact of Lime on the Mechanical Properties of HMA Mixtures in Nevada
… conducted at 0 and 6 freeze thaw cycles. The moisture damage was evaluated through the dynamic modulus test at various temperatures and frequencies. The asphalt pavement analyzer test and the repeated load triaxial test were used to evaluate the permanent deformation of the mixtures. The …
-
Jatropha curcas oil as a bio-based rejuvenating agent for reclaimed asphalt pavement mixtures
… therefore, providing more resistance to moisture damage.
-
Performance Characteristics of Polyethylene Terephthalate (PET) Modified Asphalt
… mixture exhibited better resistance to permanent moisture damage in APA Hamburg testing and also exhibited a higher TSR than the control in ITS testing. 5) The modified mixtures exhibited lower E* and higher phase angles than the control in AMPT modulus testing.</p>
Page 1 of 2