Using Rheology To Solve An Application Problem 3.3.2009
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1. The existing method for determining mixing and compaction temperatures for asphalt was not effective for modified asphalt binders containing polymers. 2. Researchers tested various unmodified and polymer-modified asphalt binders using rheology to identify their viscoelastic properties. 3. They determined that the frequency at which the phase angle equaled 86 degrees correlated with the optimal mixing and compaction temperatures determined through experimental testing. This provided a new empirical model to predict mixing and compaction temperatures for different asphalt binders.
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PU-Tech-India-2014.pptx
Ecomate is a liquid blowing agent that can be used as a cost-effective alternative to polyurethane foams. It has been commercially used for over 10 years and meets various regulatory standards. Trials of Ecomate in India showed it produced rigid polyurethane foam panels with densities, closed cell contents, thermal properties, and dimensional stability comparable to existing HCFC-141b systems. Ecomate is a viable alternative that provides environmental and cost benefits without requiring equipment changes.
Grading of bitumen by SURAJ KUMAR
This document discusses different methods for grading bituminous binders, including penetration grading, viscosity grading, and performance grading. Penetration grading uses the penetration test results at 25°C to specify grades. Viscosity grading specifies grades based on viscosity measurements at 60°C and 135°C. Performance grading assigns grades based on the temperature ranges where the binder is expected to perform satisfactorily against rutting, fatigue cracking, and low-temperature cracking. The document also covers specifications, advantages and disadvantages of each grading method, and definitions and measurement of viscosity and its importance in characterizing bitumen properties.
FDR Mix Design
Full Depth Reclamation (FDR) involves sampling existing road materials, evaluating the materials in a lab mix design, and compacting an asphalt emulsion stabilized reclaimed mix to fully reconstruct the road. The document outlines the FDR mix design process including sampling, material evaluation, designing asphalt emulsion contents, specimen fabrication, curing, and performance testing to determine structural properties for reconstruction. Quality control during construction and several constructed FDR projects using this design process are also summarized.
Technoform- A test tool to determine Thermoformability
This presentation outlines a quantitative test method and equipment to determine thermoformability of thermoplastics materials.
Technoform
The document discusses applications of a thermoformability analyzer to quantify and compare the thermoformability of plastic materials. It outlines key factors that affect thermoformability like material properties, processing parameters, and part design. Current test methods are described as inconsistent and not reflective of actual thermoforming conditions. The thermoformability analyzer aims to address these issues by simulating the full thermoforming process including heating, stretching in 3D, forming, and cooling, under controlled and repeatable conditions. Results from the analyzer can help processors optimize materials and processing parameters for thermoforming. A thermoformability index is proposed as a standardized metric to compare materials.
Dynamic Modulus Master Curve Construction Using Christensen-Anderson-Marastea...
Dynamic modulus is a fundamental property used in most mechanistic analysis of pavement response as well as material input for design of flexible pavement. Correspondingly, the E* of HMA master curve incorporated time and temperature effects. The aim of this study is to obtain dynamic modulus and phase angle data using the Christensen-Anderson-Marasteanu (CAM) model based on master curve. Samples were prepared according to the AASHTO TP 62-03 Standard Test Method for Determining Dynamic Modulus of Hot-Mix Asphalt Concrete Mixtures. The results show that the dynamic modulus is decreasing with increase of temperature for all mixtures while it is opposite trend with the phase angle. In terms of resistance of rutting, the JAPAN AC-20 is a good potential mix at frequency of 25 and 10 Hz while USA and JAPAN AC-13 mixes are good for fatigue resistance at same frequency respectively. From the Goodness-of-fit statistics, all the mixture gave an excellent correlation when R^2≥0.90 and Se/Sy ≤0.35. Nonetheless, the correlation coefficient R^2 is not always a reliable coefficient to measure the Goodness-of-fit for nonlinear regression analysis. Furthermore, they may have local or overall biases in the predictions that can reduce significantly its accuracy under certain conditions.
Velocys ppt140813_ENFL-ACS_2014
This document summarizes the commercialization of Velocys' advanced Fischer-Tropsch synthesis technology. Key points include:
Velocys has 15+ years of experience and over $300 million invested in developing their microchannel reactor technology. Their pilot plant demonstrates stable long-term operation with excellent catalyst regenerability and lifetime. Their process is designed for modular scalability.
Velocys works with world-class partners and has commercial rollout underway, with resources including technical centers and a permanent pilot plant. Their technology offers advantages including isothermal behavior, robustness, economy, and high productivity.
Experimental design and validation ensure the catalyst and process meet commercial requirements for stability, performance, and tolerance to variations
Petro teach webinar_21_10_2020_sagd and solvent-sagd design and analysis
Understanding and design of SAGD and Solvent-SAGD in thermal applications is discussed by PetroTeach webinar.
03 adam hand
Presentation delivered by Adam Hand on "Superpave" at the California Asphalt Pavement Association Spring Conference April 25, 2013 in Ontario, CA.
CRS_ThermalProperties
This document discusses the thermal and rheological properties of Povidone (PVP) and Copovidone polymers for use in hot melt extrusion. It finds that all PVP polymers show some degradation above 180°C, so that temperature is recommended as the upper limit for melt extrusion. PVP K-12 and S-630 are found to have ideal rheological properties for melt extrusion, with melt viscosities between 700-100,000 Pa.s. The other grades may require plasticization to be successfully melt extruded below 180°C.
Design of Experiment (DOE) .pptx
This document presents the design of an experiment to model the co-pyrolysis of lignocellulosic biomass and plastic to produce chemicals and biooil. The experiment used a central composite design with temperature and biomass percentage as factors to develop a response surface model. Experiments were conducted using a fixed-bed pyrolysis reactor with brown salwood sawdust and HDPE. The optimal conditions found were 600°C temperature, 0.7 HDPE:biomass ratio, and 120 mL/min nitrogen flow rate. Higher temperatures increased gas yields and decreased char and aqueous yields.
Sensitivity Analysis of Process Parameters for Polyurethane Based Panel Air F...
This document summarizes research conducted on the sensitivity of process parameters for polyurethane-based panel air filters. Experiments varied parameters like nucleation, mixing speed, mold temperature, mixing ratio, and analyzed their effects on density, hardness, and rise time. Increasing nucleation and mold temperature decreased density and hardness. Higher mixing speeds had little effect with nucleation but decreased density without. Density decreased and hardness was stable at standard mixing ratios but varied above and below. The goal is to define optimized parameter settings to minimize defects for high productivity and yield.
Engineered Wood Presentation
The document discusses testing a new OSB product formulation that incorporates pine fibers from Mountain pine beetle infestations. It will test boards with varying blends of pine and aspen fibers, and different phenol formaldehyde and diphenylmethane diisocyanate resin types. Quality testing will evaluate properties like internal bond strength, thickness swelling, modulus of rupture, and modulus of elasticity. The results will determine if the new product meets customer standards and is financially viable.
Comparative Testing of 31 Tank Lining Systems
In this project, we performed a comparative testing of 31 tank lining systems. The objective of the project was to examine and compare the performance characteristics of tank lining systems as selected by the study participants and to communicate performance data so as to assist in the selection of appropriate coatings for any given oil field environment. All coatings were applied by the same applicator according to suppliers’ recommended procedures and under suppliers’ direction. Testing included soak adhesion, cathodic disbondment, standard and pressurized Atlas Cell, autoclave and EIS analysis. It was found that most problems with the coatings performance were seen in the water phase. Higher temperature or higher thermal gradient were most likely to result in coating degradation. Emergency depressurization tended to cause blistering/loss of adhesion.
Ppp Dsc 1 Thermal Analysis Fundamentals Of Analysis
Thermal analysis techniques such as differential scanning calorimetry (DSC) are used to investigate polymer properties as a function of temperature. DSC provides information on glass transition temperatures, crystallization temperatures, melting points, and heat capacity by measuring the heat flow into or out of a small polymer sample as it is heated or cooled. Proper sample preparation and experimental parameters are important to obtain accurate and reproducible DSC results.
How to choose the right material for your design - Moldex3D plastic material ...
How to choose the right material for your design - Moldex3D plastic material ...CoreTech System (Moldex3D)
TO DOWNLOAD THE PRESENTATION DROP US A LINE AT mkt@moldex3d.com Accurate material information provides a better simulation results.
Learn about the types of plastic materials, measuring equipment used in our laboratories and polymer parameters like viscosity, PVT, crystallinity and how it affects your part design and the production process.
Topics of the presentation:
>Important aspects of polymer processing simulation
>Reasons for having quality material parameters for simulation
>The material testing capacity of Moldex3D Material Testing Lab
Another great webinar content from our top engineer Tober Sun - Dr. Sun has years of experience developing composite materials for biomedical and automotive applications. Dr. Sun’s expertise is the polymer rheology, processing, and properties. His research interests include polymer composite, biomedical materials and plastics applications in industrial design. He is now the team leader of the Moldex3D Automotive Division, also in charge of material testing lab of Coretech System (Moldex3D).
New and Improved Screw Technology for Processing INGEO™ PLA
Since the early 1990’s INGEO™ resins have made enormous improvements in the process ability of their bio-polymer resins. In the early days, when the resin was first being manufactured at pilot plant levels, extrusion processing of INGEO™ was very difficult.
Today, natural additives are being used to improve the process ability of these resins. Several new lubricant additive packages were tested to determine which package produced the best overall performance and process improvements. The process data was used to quantify the process ability of the various additive packages.
The data was then compared to the internal pressure data that was collected to analyze and determine the best overall additive package.
DESIGN OF OPEN GRADED FRICTION COURSE MIX USING POLYMER MODIFIED BITUMEN(LDPE)
Generation of plastics has increased significantly. Utilization of all types of plastics is unavoidable and it will produce non-biodegradable waste materials. The waste plastics are harmful to the environment if it is not disposed properly. It is very useful in the design and development of high quality flexible road pavement. So, adding the waste plastics as additives in the mix design of the pavement was expected to give good performance when comparing with conventional mix. In this project, advantages and development of modified bitumen is to be studied. The dosage of LDPE modified binder has taken as 6%, 8% &10% in the Open Graded Frictional Course (OGFC) mix design by wet process. The result shows the performance of OGFC mix using PMB.
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WMA Presentation at Transportation Research Board Conference 2007
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Technoform- A test tool to determine Thermoformability
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Petro teach webinar_21_10_2020_sagd and solvent-sagd design and analysis
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ACPA_MIX_DESIGN_PRESENTATION (civilengineering).pdf
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Ppp Dsc 1 Thermal Analysis Fundamentals Of Analysis
Ppp Dsc 1 Thermal Analysis Fundamentals Of Analysis
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New and Improved Screw Technology for Processing INGEO™ PLA
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Using Rheology To Solve An Application Problem 3.3.2009
- 1. Using Rheology to Solve an Applications Problem for Process Control or Quality Assurance. By: John Casola , Malvern Instruments & Dr. Randy West , National Center for Asphalt Technology At Auburn University (NCAT)
- 3. Paint Shear Stress (Pa) or Shear Rate (s-1) Viscosity (Pa . s Hard to apply / Poor Coverage Splatter / Poor Coverage Stipple Orange Peel Running Dripping Rheological Index A B C
- 4. Epoxy time (s) or Temperature ( o C) Viscosity (Pa . s Modulus G’ G” (Pa) Initial Viscosity Minimum Viscosity Gel-Cure Time/Temp Ultimate Modulus
- 5. Paper Coating Viscosity (Pa . s Shear Rate (s-1) A B C D Rate at Blade / Nip Film thickness Dry time
- 10. Equi-Viscous Method (rotational viscosity or Brookfield test) 0.1 0.2 0.3 0.5 1 10 5 100 110 120 130 140 150 160 170 180 190 200 Temperature, C Viscosity, Pa s Compaction Range Mixing Range
- 11. Modified have significantly different temperature susceptibility Modified Neat 0.1 0.2 0.3 0.5 1 10 5 100 110 120 130 140 150 160 170 180 190 200 Temperature, C Viscosity, Pa s Compaction Range Mixing Range
- 13. Asphalt Binders In the Test Plan Polymer modified grade unmodified grade B -40 C E A -34 I O D -28 M, N G,H,L F -22 J -16 K -10 PG 82 PG 76 PG 70 PG 64 PG 58 PG 52 Temp Range (C)
- 14. Asphalts Tested Air Blown All these asphalt binders have the same modulus at the TruGrade Un-Modified Modified
- 21. Viscosity at 135 o C Newtonian Behavior is Predominate
- 22. Viscosity at 100 o C Some of the Modified begin to show Non-Newtonian Behavior
- 24. Dynamic Shear Rheology Comparing 2 Binders; Neat vs. Modified
- 26. Asphalt A Time Temperature Superposition to 80 o C
- 27. Sample A Identify Freq at Phase of 86 o at a Temperature of 80 o C
- 28. Sample A Freq = 118.45rad/sec Phase = 86.06 o Temp = 80 o C
- 29. Asphalt B Freq = 1.100 Phase = 86.08 Temp = 80C
- 30. Asphalt C Freq = 0.206035 Phase = 85.98 Temp = 80C
- 31. Asphalt D Freq=122.563 Phase=85.98 Temp=80C
- 32. Asphalt E Freq= 37.85 Phase= 86.17 Temp= 80C
- 33. Asphalt F Freq = 74.57 Phase = 86.3 Temp = 80C
- 34. Asphalt G Freq = 0.0265 Phase = 85.96 Temp = 80C
- 35. Asphalt H Freq = 0.2206 Phase = 86.1 Temp = 80C
- 36. Asphalt I Freq = 2.975 Phase = 86.05 Temp = 80C
- 37. Asphalt J Freq=565.2rad/sec Phase=85.97 o Temp=80C
- 38. Sample K Freq = 800 Phase = 86 Temp = 80C
- 39. Asphalt M Freq = 0.0684 Phase = 85.9 Temp = 80C
- 40. Comparison of ranking Indicated we had the right approach Un-Modified Modified
- 41. Created Mix Temperature Chart Freq at Phase of 86 o vs. Experimental Temp Results
- 42. Identify a model fit
- 44. Predicted Mix & Compaction Temperatures
- 45. The Procedure…AASHTO & ASTM