Relevant bibliographies by topics / DSR (dynamic shear rheometer)

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'DSR (dynamic shear rheometer)'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "DSR (dynamic shear rheometer)"

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Apostolidis, Panos, Cor Kasbergen, Amit Bhasin, Athanassios Scarpas, and Sandra Erkens. "Study of Asphalt Binder Fatigue with a New Dynamic Shear Rheometer Geometry." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 28 (2018): 290–300. http://dx.doi.org/10.1177/0361198118781378.

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With the effort to precisely predict the lifetime of asphalt binders and subsequently optimize their utilization in a more economical way, the objective of this study was to introduce a new methodology to improve the fatigue characterization of asphalt binders through a new dynamic shear rheometer (DSR) sample testing geometry. Initially, numerical analyses were performed to study the geometry-related issues of a standard DSR sample on time sweep tests, and to assist in the effort to increase understanding of the DSR damage phenomena of asphalt samples. On the basis of these numerical analyses, a new testing geometry, the parallel hollow plate, was developed and its test results compared with the standard sample testing geometry. A single type of asphalt binder was assessed using amplitude sweep tests. The obtained results demonstrated a significant difference between the fatigue of the two sets of DSR sample geometries. On the basis of these, time sweep tests were conducted for the same sample geometries and the results demonstrated that the new testing geometry yields material response consistency under different loading conditions. The lifetime prediction of the standard parallel plates showed a significant difference with the newly developed DSR sample testing geometry by overestimating the total number of cycles until asphalt binder failure. The new testing geometry allowed the isolation of the damaged area of asphalt binder by localizing the shear stresses in the samples’ periphery.
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Vacin, Ota, Jiri Stastna, and Ludo Zanzotto. "Creep Compliance of Polymer-Modified Asphalt, Asphalt Mastic, and Hot-Mix Asphalt." Transportation Research Record: Journal of the Transportation Research Board 1829, no. 1 (2003): 33–38. http://dx.doi.org/10.3141/1829-05.

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The possibility of using commercial rheometers for comprehensive testing of asphalt binders, asphalt mastics, and hot-mix asphalts (HMA) is explored. Samples of one polymer-modified asphalt, its mix with fine mineral filler (mastic), and one HMA prepared with the same modified asphalt as binders were tested in the dynamic shear rheometer (DSR) and the bending beam rheometer (BBR). All tested materials can be characterized by their discrete relaxation and retardation spectra (under the condition of small deformations). DSR testing was performed in the plate–plate and the torsion bar geometry. From the obtained relaxation and retardation spectra, the shear compliance, J(t), was calculated and compared with the tensile creep compliance, D(t), measured in BBR (both creep and recovery experiments were run). A simple relationship between J(t) and D(t) was found for the asphalt binder and the asphalt mastic. In the case of HMA, the bulk compliance, B(t), contributes to D(t) at short and long times. Both the Boltzmann superposition principle and the time–temperature superposition principle hold very well for all tested materials at low temperatures. There are qualitative differences, in the rheological behavior, of the asphalt binder and asphalt mastic on one side and the HMA on the other. These differences can be seen in dynamic (DSR) as well as in transient (BBR) experiments.
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Yi, Ming Wei, Delehei, Jin Cai Wang, and Xue Da Feng. "Effect of Ultraviolet Light Aging on Fatigue Properties of Asphalt." Key Engineering Materials 599 (February 2014): 125–29. http://dx.doi.org/10.4028/www.scientific.net/kem.599.125.

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The ultraviolet aging effects on fatigue properties of asphalt were studied by using Dynamic Shear Rheometer (DSR). The low-temperature fatigue performance of asphalt has been tested in this paper with the strain-controlled mode of DSR. The samples were compacted under the temperature of 10°C and the constant strain of 2.0% in strain-controlled mode fatigue test. And the results showed that ultraviolet aging decreases the fatigue life-span of asphalt significantly.
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Li, Jin. "Research of the Recycled Asphalt 's Rheological Behavior." Advanced Materials Research 550-553 (July 2012): 2395–401. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2395.

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Analyze the rheology of recycled asphalts used by three rejuvenators：R1、R2、R3，the study of recycled asphalt's rheological behavior adopt BBR(Bending Beam Rheometer) and DSR(Dynamic Shear Rheometer). From the result of experiment：the usage of rejuvenator reduce the asphalt ability of anti-tracking under high temperature, some of them can even recover to the level of fresh asphalt；the mix of rejuvenators improve largely the asphalt ability of resistance to fatigue and the ability of anti-cracking under low temperature.
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Kim, Yoo Jae, Bum-Yean Cho, Soon-Jae Lee, Jiong Hu, and James W. Wilde. "Investigation of Rheological Properties of Blended Cement Pastes Using Rotational Viscometer and Dynamic Shear Rheometer." Advances in Materials Science and Engineering 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/6303681.

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To successfully process concrete, it is necessary to predict and control its flow behavior. However, the workability of concrete is not completely measured or specified by current standard tests. Furthermore, it is only with a clear picture of cement hydration and setting that full prediction and control of concrete performance can be generalized. In order to investigate the rheological properties of blended cement pastes, a rotational viscometer (RV) was used to determine the flow characteristics of ordinary and blended pastes to provide assurance that it can be pumped and handled. Additionally, a dynamic shear rheometer (DSR) was used to characterize both the viscous and elastic components of pastes. Ordinary Portland cement paste and blended pastes (slag, fly ash, and silica fume) were investigated in this study. The stress and strain of the blended specimens were measured by the DSR, which characterizes both viscous and elastic behaviors by measuring the complex shear modulus (the ratio of total shear stress to total shear strain) and phase angle (an indicator of the relative amounts of recoverable and nonrecoverable deformation) of materials. Cement pastes generally exhibit different rheological behaviors with respect to age, mineral admixture type, and cement replacement level.
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Wang, Tao, Xuelei Wei, De Zhang, Hai Shi, and Zhiqiang Cheng. "Evaluation for Low Temperature Performance of SBS Modified Asphalt by Dynamic Shear Rheometer Method." Buildings 11, no. 9 (2021): 408. http://dx.doi.org/10.3390/buildings11090408.

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Finding an alternative or supplementary test method to evaluating the low temperature performance of asphalt is an area of considerable interest. This paper tries to explore the possibility of using the dynamic shear rheometer (DSR) method for assessing the low temperature properties of styrenebutadienestyrene (SBS) modified asphalt. In the study, 60/80 and 80/100 pen grade asphalt binders, named binder A-70, binder B-70 and binder C-90, are used to produce the SBS modified asphalt samples. After that, the low temperature performance of the asphalt binders is characterized by using bending beam rheometer (BBR) test. The results indicate that the low temperature performance of the different binders is related to the source of the binder. The low temperature performance of asphalt could be improved with the addition of the SBS. The DSR test is used to develop the complex modulus master curves for binders. Based on the principle of time–temperature conversion, the glass transition temperature of asphalt is calculated by the Williams–Landel–Ferry (WLF) equation. The glass transition temperatures (Tg) of base asphalt and the SBS modified asphalt are determined by the viscoelastic parameters of the master curve and the WLF equation coefficients based on the time–temperature superposition principle. By establishing the relationship between the critical temperature and the Tg of the asphalt binder, the effectiveness of the method established in this paper is verified. The advantage of this method is the ability to use the DSR test for the rapid evaluation of the low temperature performance of asphalt, which is able to reduce testing materials and save testing time as well. The glass transition temperature of the SBS modified asphalt is closely associated with aging degree, asphalt source and the SBS content.
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Gong, Xiangbing, Zejiao Dong, Haipeng Wang, Xianyong Ma, Huanan Yu, and Kaikai Hu. "Rheological Characterization of Asphalt Fine Aggregate Matrix Using Dynamic Shear Rheometer." Polymers 11, no. 8 (2019): 1273. http://dx.doi.org/10.3390/polym11081273.

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Asphalt fine aggregate matrix (FAM) is a predominant component directly related to field performances of hot asphalt mix (HMA), it is necessary to investigate material properties of FAM. Prior to preparing FAM specimens, the asphalt content was calculated by keeping the filler–bitumen (FB) ratio the same as in the corresponding HMA. A non-destructive fabrication method instead of coring and cutting methods was developed to compact FAM cylinders, and the joint base was designed to be concentric with the loading axis of testing system. Rheological responses of FAM were studied using the dynamic shear rheometer (DSR). Two repeated tests prove that the FAM compactor and the jointed base meet the requirement of data validation. Results show that rheological performances of FAM are significantly affected by asphalt content, gradation, air void content, and testing frequency. Air void is concluded to be the decisive factor which influences the stability of FAM, and the fiber is demonstrated to play a role on enhancing the flow resistance of FAM-F even though with the richest asphalt content.
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Hajj, Ramez, Angelo Filonzi, Syeda Rahman, and Amit Bhasin. "Considerations for using the 4 mm Plate Geometry in the Dynamic Shear Rheometer for Low Temperature Evaluation of Asphalt Binders." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 11 (2019): 649–59. http://dx.doi.org/10.1177/0361198119855332.

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The low-temperature properties of asphalt binder have attracted attention in recent years thanks to an increase in the use of reclaimed asphalt pavements (RAP). Traditional methods to evaluate the low-temperature properties of the binder require a large amount of binder that needs to be recovered from RAP samples for testing with a Bending Beam Rheometer (BBR). To economize on sample size for RAP materials and also for emulsion residues, previous researchers have explored the potential of using a 4 mm diameter specimen with a Dynamic Shear Rheometer (DSR) in lieu of the BBR. To compare results from frequency sweep tests conducted using the DSR with results from the BBR, data from the former need to be converted to time domain and subsequently from a shear load response to an axial load response. Previous research studies have developed methods to accomplish these two conversions to compare data from the DSR with data from the BBR. The objective of this study is to examine some of these methods from the literature and elsewhere based on the principles of linear viscoelastic interconversion using a set of 11 different binders. Results using different analytical approaches from this study show that the DSR has good repeatability and verify that it can be used as a surrogate for the BBR to determine low-temperature properties, while exercising some caution with some of the assumptions related to Poisson’s ratio.
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Khedaywi, Taisir, Ghazi Al-Khateeb, and Motaz Irfaeya. "Effect of Medical Ash on Shear Properties of Asphalt Binder Using Superpave Dynamic Shear Rheometer (DSR)." Journal of Solid Waste Technology and Management 38, no. 1 (2012): 19–27. http://dx.doi.org/10.5276/jswtm.2012.19.

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Sun, Yi Han, Shao Peng Wu, Ji Qing Zhu, and Jin Jun Zhong. "Investigation on Static Shear Creep Behavior of Asphalt Mastic Containing Recycled Red Brick Powder." Advanced Materials Research 306-307 (August 2011): 1707–11. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1707.

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The static shear creep behavior of asphalt mastic containing recycled red brick powder (RBP) is investigated in this paper. The used mastic consists of asphalt and filler at a mass ratio of 1:1. Dynamic Shear Rheometer (DSR) performed the static shear creep tests at 0°C. The static shear creep behavior of RBP asphalt mastic was analyzed and modeled based on Burgers model. It is concluded that the introduction of RBP results in smaller deformation, higher static shear creep stiffness modulus of asphalt mastic at 0°C. It was also indicated that Burgers model can well explain the static shear creep behavior of RBP asphalt mastic.
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Dissertations / Theses on the topic "DSR (dynamic shear rheometer)"

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Střasáková, Monika. "Stárnutí asfaltových pojiv." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240117.

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The theoretical part of this thesis describes the rheology of bituminous binders, aging of asphalt binders and laboratory methods simulating short and long term aging. The following describes an empirical tests (needle penetration, softening point ring ball method) and functional tests (complex shear modulus and phase angle, dynamic viscosity), which are performed in the dynamic shear rheometer. At the end of this section, laboratory aging of bituminous binders using method RTFOT and method RTFOT + PAV is described in more detail. In the practical part of this thesis, the results of all tests performed on the binders aged using RTFOT + PAV are introduced and compared with results of properties of non-aged binders and binders aged by 3xRTFOT.
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Musil, Vladimír. "Relaxace smykového napětí asfaltových pojiv v DSR." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227690.

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The thesis describes the relaxation properties of bituminous binders determined in dynamic shear rheometer (DSR). Paving bitumen, polymer modified bitumen (PMB) and crumb rubber modified bitumen (CRmB) were chosen for comparison. In order to describe the effects of ageing on asphalt binders relaxation properties, the laboratory simulation of ageing using RTFOT and 3xRTFOT method was performed. For each binder were simultaneously conducted tests of needle penetration, softening point and elastic recovery. Selected bitumens were used for the production of asphalt mixtures. The low-temperature properties tests (TSRST) were performed for these mixtures, when the results were compared to the relaxation properties of binders determined in the DSR.
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Ali, Mahdi. "Study of the bitumen aging effects on the rheological properties and fatigue behavior." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16255/.

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A study of bitumen aging effects on the rheological properties and fatigue behavior is carried out on five polymer modified bitumen provided by an oil company. Dynamic Shear Rheometer (DSR), is used to perform advanced experimental investigation. It allows practicing frequency sweep tests, fatigue tests and time sweep tests. Polymer modified bitumen with different percentage of SBS with or without the presence of crumb rubber are tested before and after short and long aging processes. Master curves were generated based on frequency sweep tests data, they are studied, and a comparison was conducted between each bitumen before and after aging. In this thesis, the DSR is presented, as well as the testing procedure and the tested materials. A fatigue life analysis of the results, based on the use of two different criteria, the first criterion is classically used: it consists in defining the failure as a 50% loss of the initial stiffness. The other criteria based on dissipated energy data. This thesis provides results which show the effects of several factors on fatigue and healing response such as bitumen type, ageing, the presence of rubber and polymer modification.
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Coufalík, Pavel. "Reologické vlastnosti asfaltových pojiv." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-355627.

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Dissertation thesis is focused on rheological properties of asphalt binders and on changes of their performance during the lifetime in road structures. Aging processes of asphalt binders and methods of laboratory aging are described in the theoretical part of the thesis. Furthermore, basic rheological models and related test methods for the evaluation of asphalt binders are described. In the practical part, properties of asphalt binders are investigated after aging process and their performance is evaluated by empirical and functional test methods. The various methods of aging are compared with each other and a relationship between real conditions and laboratory aging is researched. In the next section, vacuum flashed cracked residue (VFCR) is added to the selected asphalt binders and their influence on rheological properties during description of aging of asphalt binders is investigated. The results were used in publication of two certified methodology under the title „The methodology for the evaluation of paving bitumen in terms of susceptibility to thermal oxidative aging“ and „The methodology describes laboratory aging of asphalt mixtures“. The results of the thesis are listed in the conclusion.
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Bommavaram, Ramamohan Reddy. "Evaluation of healing in asphalt binders using dynamic shear rheometer and molecular modeling techniques." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2919.

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Martelli, Luca. "Studio delle proprietà reologiche di leganti bituminosi modificati ad "alta lavorabilità" mediante Dynamic Shear Rheometer." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/2009/.

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Orlandi, Giulia. "Caratterizzazione reologica avanzata di bitumi estesi con materiali di riciclo per lo sviluppo di conglomerati bituminosi innovativi." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Lo scopo di questa tesi è studiare leganti eco-sostenibili per pavimentazioni stradali ottenute mediante l’uso di polverino di gomma da Pneumatici Fuori Uso (PFU) ed il residuo della raffinazione di oli motore esausti (Re-refined Engine Oil Bottom, REOB). In questo modo si cerca di approfondire le attuali conoscenze scientifiche sull'uso dei materiali di riciclo come agenti modificanti del risultante legante bituminoso al fine di ridurre l'uso del bitume di origine petrolifera, testando il legante ed i conglomerati bituminosi dal punto di vista meccanico e reologico. Al fine di stimare le prestazioni di questi nuovi materiali "green" per la costruzione di strade, sono stati eseguiti test sperimentali di laboratorio. In dettaglio, i test reologici su estensioni e leganti bituminosi vengono eseguiti con il Dynamic Shear Rheometer (DSR), determinando il modulo di rigidezza mediante la prova Indirect Tensile Stiffness Modulus (ITSM), la resistenza a trazione indiretta con il Indirect Tensile Strength (ITS) e la sensibilità all’acqua determinando il rapporto Indirect Tensile Strength Ratio (ITSR). L'interpretazione dei risultati mostra la possibilità di modificare il bitume con materiali di scarto, ottenendo prestazioni pari a quelle dei conglomerati bituminosi tradizionali e riducendo in questo modo l'uso di bitume, dando una "seconda vita" a questi materiali di scarto.
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Uccellatori, Martina. "Modelli particellari per lo studio delle miscele bituminose." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5423/.

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Mazzotta, Francesco. "Studio reologico avanzato di bitumi modificati ed additivati:proposta di una nuova procedura di aging." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/4257/.

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Le problematiche ambientali e socio – economiche legate alla costruzione di nuove infrastrutture viarie, impongono la progettazione e costruzione di strade che combinino ad elevati standard prestazionali, la riduzione dell’impatto ambientale in fase realizzativa e manutentiva. Quanto detto avvalora il crescente utilizzo di materiali bituminosi modificati con polimeri ed additivati con cere. I primi conferiscono alla miscela maggiore elastoplasticità, incrementandone la durabilità e la resistenza a fatica. Nei secondi la presenza del materiale paraffinico contribuisce a ridurre la viscosità del bitume, il che consente il notevole abbassamento della temperatura di produzione e stesa della miscela. Numerosi studi inoltre hanno dimostrato che le caratteristiche meccaniche della pavimentazione sono fortemente influenzate dal grado di ossidazione delle componenti organiche del bitume, ovvero dal fenomeno dell’invecchiamento o aging. Risulta pertanto fondamentale affiancare allo studio reologico del bitume, prove di simulazione dell’ invecchiamento nel breve e lungo termine. Nel corso della seguente ricerca si provvederà pertanto ad analizzare leganti modificati ed additivati secondo la teoria della viscoelasticità, simulando le reali condizioni di carico ed invecchiamento alle quali il bitume è sottoposto. Tutte le prove di caratterizzazione reologica avanzata prevederanno l’utilizzo del DSR (Dynamic Shear Rheometer) in varie configurazioni di prova e si simulerà l’invecchiamento a breve termine mediante RTFOT (Rolling thin film oven test). Si proporrà inoltre una nuova procedura di aging invecchiando il bitume alla temperatura di equiviscosità o Twork , ovvero a quel valore della temperatura tale per cui, in fase di messa in opera, si avrà una distribuzione molecolare omogenea del modificante all’interno del bitume. Verranno quindi effettuate ulteriori prove reologiche sui leganti invecchiati a tale temperatura. Si darà infine supporto ai risultati della ricerca effettuando prove chimiche con la tecnica analitica FTIR (Fourier Transform Infrared Spectroscopy), analizzando i cambiamenti molecolari avvenuti nel bitume a seguito dell’aggiunta del modificante e dell’invecchiamento.
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Calamelli, Filippo. "Studio reologico di mastici per miscele di conglomerato bituminoso drenante contenente polverino di gomma da pfu." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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Le prestazioni meccaniche di una miscela di conglomerato bituminoso dipendono principalmente dai materiali che la compongono e dalla loro interazione. La risposta tenso-deformativa delle sovrastrutture stradali è strettamente legata al comportamento reologico del legante bituminoso e dalla sua interazione con lo scheletro litico. In particolare nelle pavimentazioni drenanti, a causa dell’elevato contenuto di vuoti, il legame che si crea tra il legante (mastice bituminoso) e l’aggregato è molto forte, per questo motivo è importante migliorarne le prestazioni. Additivando il mastice con polverino di gomma da PFU (pneumatici fuori uso), non solo si migliorano prestazioni, resistenza alle deformazioni permanenti ed elastoplasticità del materiale, ma si sfruttano anche materiali di recupero, portando vantaggi anche dal punto di vista ambientale. In quest’ottica la ricerca effettuata nella tesi si pone come obiettivo l’analisi reologica e lo studio di mastici additivati con polverino di gomma ricavato da PFU, per la realizzazione di conglomerati bituminosi drenanti. In particolare, partendo da un bitume di base, sono stati preparati due mastici: il primo ottenuto miscelando bitume modificato e filler calcareo, il secondo aggiungendo al precedente anche il polverino di gomma. Tale studio è stato eseguito mediante l’utilizzo del DSR (Dynamic Shear Rheometer – UNI EN 14770), con il quale sono state affrontate tre prove: Amplitude Sweep test, per la valutazione del valore di deformazione di taglio γ entro il quale il materiale si mantiene all’interno del campo di viscoelasticità lineare (Linear visco-elasticity, LVE); Frequency Sweep test, per l’estrapolazione delle master curves; Multiple stress Creep Recovery, per valutare la resistenza del materiale alle deformazioni permanenti. Dall’analisi dei dati è stato possibile definire il comportamento reologico di entrambi i mastici e, in seconda analisi, confrontarne le caratteristiche e le prestazioni.
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Book chapters on the topic "DSR (dynamic shear rheometer)"

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Almutairi, Haya, Dandi Zhao, and Hassan Baaj. "Investigating Fatigue Characteristics of Asphalt Binder Modified with Phase Change Materials Using Dynamic Shear Rheometer." In RILEM Bookseries. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-46455-4_145.

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Hospodka, M., and B. Hofko. "Fatigue resistance of asphalt mastic by Dynamic Shear Rheometer testing." In Bituminous Mixtures and Pavements VII. CRC Press, 2019. http://dx.doi.org/10.1201/9781351063265-4.

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Airey, G. D., A. E. Hunter, and B. Rahimzadeh. "The influence of geometry and sample preparation on dynamic shear rheometer testing." In Performance of Bituminous and Hydraulic Materials in Pavements. Routledge, 2017. http://dx.doi.org/10.1201/9780203743928-1.

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Javid, M., and M. Mirza. "Characterization of polymer modified asphalt for rutting and cracking potential using dynamic shear rheometer." In Advances in Transportation Geotechnics 2. CRC Press, 2012. http://dx.doi.org/10.1201/b12754-80.

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Ahmed, Taher, and Hussain Khalid. "A new approach in fatigue testing and evaluation of hot mix asphalt using a dynamic shear rheometer." In Bituminous Mixtures and Pavements VI. CRC Press, 2015. http://dx.doi.org/10.1201/b18538-51.

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"Usage of advanced functions of Dynamic Shear Rheometer for the selection of a suitable binder for asphalt mixtures." In Asphalt Pavements. CRC Press, 2014. http://dx.doi.org/10.1201/b17219-123.

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Conference papers on the topic "DSR (dynamic shear rheometer)"

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Gražulytė, Judita, and Audrius Vaitkus. "Analysis of Methods and Criteria for Evaluation of Bitumen Performance at Low Temperatures." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.137.

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Thermal cracking is the dominant pavement failure in the cold regions. After each winter, the newly appeared cracks have to be sealed. However, after a few years depending on the sealing method the previously sealed cracks have to be resealed. It results in high maintenance budget and human resources. The appropriate bitumen selection on the basis of bitumen performance at low temperatures can reduce the effect of thermal cracking. For this purpose, number of methods are developed such as Fraass test, bending beam rheometer (BBR) test, direct tension (DT) test, asphalt binder cracking device (ABCD), dynamic shear rheometer using 4 mm diameter parallel plates (4-mm DSR) test, single-edge-notched bending (SENB) test, doubleedge- notched tension (DENT) test and spectral analysis of acoustic emission (AE). This paper presents the analysis of different tests for the evaluation of the bitumen performance at low temperatures, highlights their advantages and disadvantages and gives their limiting criteria. These limiting criteria are usually used to determine the critical cracking temperature, which is defined as the lowest temperature at which bitumen can withstand induced thermal stresses.
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Yixu, Wang, Peng Lu, Cai Jiacheng, You Chunmei, and Miao Na. "Research on the Calibration Method of Dynamic Shear Rheometer." In AIAM2020: 2nd International Conference on Artificial Intelligence and Advanced Manufacture. ACM, 2020. http://dx.doi.org/10.1145/3421766.3421869.

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Lu, X. "Fatigue and healing characteristics of bitumens studied using dynamic shear rheometer." In Sixth International RILEM Symposium on Performance Testing and Evaluation of Bituminous Materials. RILEM Publications SARL, 2003. http://dx.doi.org/10.1617/2912143772.051.

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Airey, G., A. Hunter, and B. Rahimzadeh. "The influence of geometry and sample preparation on dynamic shear rheometer testing." In Proceedings of the Fourth European Symposium on Performance of Bituminous and Hydraulic Materials in Pavements, Bitmat 4. CRC Press, 2017. http://dx.doi.org/10.4324/9780203743928-3.

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Radenberg, Martin, and Michael Gehrke. "Assessing bitumen in the whole service-temperature-range with the dynamic shear rheometer." In 6th Eurasphalt & Eurobitume Congress. Czech Technical University in Prague, 2016. http://dx.doi.org/10.14311/ee.2016.259.

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Zegard, Amou, Farhad Helmand, Tianchi Tang, Kumar Anupam, and Athanasios Scarpas. "Rheological Properties of Tire Rubber Using Dynamic Shear Rheometer for FEM Tire-Pavement Interaction Studies." In Eighth International Conference on Maintenance and Rehabilitation of Pavements. Research Publishing Services, 2016. http://dx.doi.org/10.3850/978-981-11-0449-7-095-cd.

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7

Breckel, Alex, Altan Ozkan, and Halil Berberoglu. "Steady and Dynamic Rheological Properties of Dense Slurries of Chlorella vulgaris." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64123.

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This experimental study reports the steady and dynamic rheological properties of dense slurries of the green algae Chlorella vulgaris. Biofuel production from algae growth is a promising technology that has the potential to serve as a significant component of the world’s revised energy mix. Along with providing a renewable fuel source, algae production acts as a CO2 sink, potentially reducing net CO2 emissions. Design and operation of algae biofuel production facilities require accurate knowledge of the flow characteristics of algae slurries and estimation of the pumping and harvesting energy requirements. Reliable rheological data is needed to optimize production processes to lower costs and increase yields. This study reports steady state viscosity measurements conducted using the ARES TA rotational rheometer using the common algae strain Chlorella vulgaris over the packing factor range from 0.1 to 0.8. Viscoelastic data was gathered using oscillatory tests conducted on the rotational rheometer with a double wall coquette fixture geometry. Dynamic frequency sweep tests were used to recover the storage shear modulus (G′), and the loss shear modulus (G″), which correspond to the elastic and viscous properties of the fluid, respectively. Apparent viscosity of the cell suspensions increased with increasing packing factors. Packing factors lower than 0.3 exhibited Newtonian characteristics, whereas at larger packing factors the behavior was shear-thinning. The algae suspensions exhibited both viscous and elastic behavior when subjected to oscillatory flow, behaving as a dilute solution. Finally, the frequency of the gel point increased with increasing packing factor.
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Ashish, Prabin Kumar, Dharamveer Singh, and Siva Bohm. "A Study on the Rheological Performance of a Nanoclay-Modified Asphalt Binder Using the Brookfield Viscometer and Dynamic Shear Rheometer." In Fourth Geo-China International Conference. American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480113.002.

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Lee, John, Ahmadi Tehrani, Steve Young, and Christine Nguyen. "Viscoelasticity and Drilling Fluid Performance." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23908.

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Viscoelastic properties of drilling fluids are not often measured due to a lack of understanding of their impact on fluid performance as well as a lack of field equipment suitable for such measurements. A study has been conducted recently to evaluate the viscoelastic properties of xanthan gum and invert drilling fluids and their impact on barite suspension quality and rheology. Both a Brookfield YR-1 rheometer and a Bohlin Gemini 150 rheometer were used to generate data for comparison. The impact of viscoelasticity on steady-state rheology, thixotropy and shear thinning was evaluated using a multi-speed rheometer. A soon-to-be-adopted API recommended procedure was used to measure the barite sag tendency under dynamic conditions. Aqueous solutions of xanthan gum showed that viscoelasticity, shear thinning and thixotropy increased with increasing polymer concentration. When the solutions were weighed up with barite, they became more viscoelastic, slightly more thixotropic, but less shear thinning. Proper suspension of barite was observed at a xanthan gum concentration of 2 lb/bbl without any other additives. Compared to xanthan-barite suspensions, invert drilling fluids of similar density exhibited a greater viscoelasticity but less thixotropy and shear thinning. Treatment of invert drilling fluids with viscoelastic polymers resulted in a further enhancement of viscoelasticity and thixotropy, but a slight deterioration in shear thinning. Barite suspension quality showed a certain degree of correlation with viscoelasticity as well as steady-state rheology; however, these properties were temperature dependent for invert drilling fluids. Hydraulic analyses indicated that viscoelastic additives can impact fluid viscosity thus affecting pressure loss, equivalent circulating density and hole cleaning. Viscoelasticity enhancement may be used to improve barite suspension quality under certain conditions, but its impact on hydraulics must be carefully considered.
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Šernas, Ovidijus, Donatas Čygas, Audrius Vaitkus, and Vytautė Gumauskaitė. "The Influence of Crumb Rubber on Modified Bitumen Properties." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.147.

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Rubber derived from grinding of recycled cars and trucks tyres may be successfully used as a bitumen modifier. Number of researches reported sufficient characteristics of rubber modified asphalt binders or modified asphalt mixes in terms of improved permanent deformation and fatigue cracking. The behavior of crumb rubber asphalt binders depends on several factors, such as modification method, rubber content and size, modification temperature, mixing speed and time applied during the digestion process. The aim of this study is to evaluate the effect of crumb rubber amount and type on modified bitumen low and high temperature properties. This paper presents results of unmodified bitumen, crumb rubber crumb rubber and polymer modified bitumen. Low and high temperature properties have been evaluated using bending beam rheometer and dynamic shear rheometer. Moreover, softening point and viscosity tests have been performed. The study results revealed that crumb rubber modified bitumen performed better than pure bitumen and similarly to polymer modified bitumen.
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