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Articles 1 - 4 of 4
Full-Text Articles in Engineering
Investigation Of The Physical And Molecular Properties Of Asphalt Binders Processed With Used Motor Oils, Mohyeldin Ragab, Magdy Abdelrahman
Investigation Of The Physical And Molecular Properties Of Asphalt Binders Processed With Used Motor Oils, Mohyeldin Ragab, Magdy Abdelrahman
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In this work we investigated the performance aspects of addition of used motor oils (UMO) to neat and crumb rubber modified asphalts (CRMA) and related that to the change of molecular size distribution of modified asphalt’s fractions; asphaltenes, saturates, naphthene aromatics, and polar aromatics. Based on the results of temperature sweep viscoelastic tests, addition of crumb rubber modifier (CRM) alone or with UMO results in the formation of internal network within the modified asphalt. Based on the results of short and long term aged asphalts, the utilization of combination of UMO and CRM enhanced the aging behavior of asphalt. Bending …
An Inverted Teaching Model For A Mechanics Of Materials Course, Jeffery S. Thomas, Timothy A. Philpot
An Inverted Teaching Model For A Mechanics Of Materials Course, Jeffery S. Thomas, Timothy A. Philpot
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Instructors at Missouri University of Science and Technology have been offering certain sections of a mechanics of materials course in an inverted format for the past two years. In this format, students learn the concepts outside of class, using a textbook, animations and videos developed by the authors, and work on homework either individually or in groups during the optional class time. Students take eight multiple-choice exams and a final exam that is common to both the inverted sections and the more traditional lecture-based sections. Homework in the inverted sections is assigned but not graded. The in-class exams are given …
Theory For Dynamic Longitudinal Dispersion In Fractures And Rivers With Poiseuille Flow, Lichun Wang, M. Bayani Cardenas, Wen Deng, Philip C. Bennett
Theory For Dynamic Longitudinal Dispersion In Fractures And Rivers With Poiseuille Flow, Lichun Wang, M. Bayani Cardenas, Wen Deng, Philip C. Bennett
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
We present a theory for dynamic longitudinal dispersion coefficient (D) for transport by Poiseuille flow, the foundation for models of many natural systems, such as in fractures or rivers. Our theory describes the mixing and spreading process from molecular diffusion, through anomalous transport, and until Taylor dispersion. D is a sixth order function of fracture aperture (b) or river width (W). The time (T) and length (L) scales that separate preasymptotic and asymptotic dispersive transport behavior are T = b2/(4D m), where Dm is the molecular diffusion …
Evaluation Of Hvfa Cementitious Paste And Concrete Mixtures, David Newton Richardson, K. W. Beckemeier, D. D. Davis
Evaluation Of Hvfa Cementitious Paste And Concrete Mixtures, David Newton Richardson, K. W. Beckemeier, D. D. Davis
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In the Paste Screening Study, 25 combinations of five Type I/II portland cements and five Class C fly ashes commonly used in Missouri were tested in paste form with no chemical or powder additives. Testing procedures included semi-adiabatic calorimetry, Vicat setting time, miniature slump, and compressive strength at one and 28 days. the two most reactive and two least reactive combinations (defined by one day strengths) were further evaluated in the Paste Main Effects Study. Eighty mixtures were examined.