Viscosity of Asphalts by Vacuum Capillary Viscometer. ASTM D, EN , ASTM D, IP , EN , AASHTOT Rev 2. Content of Presentation. ✓ What is Bitumen. ✓ Viscosity of Bitumen. The ASTM D, IP , ISO , and AASHTOT test methods cover procedures for the determination of viscosity of asphalt binder (bitumen) by.
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Tamson TV4000 for ASTM D2171 Viscosity of Bitumen
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Hydrocarbon product, originating from crude oil, refrained from lighter fractions. Refined it is a stable, semi-solid substance, at ambient temperatures.
In Europe it is named bitumen, d2117 in North America it is named asphalt cement or asphalt. Viscosity grade of bitumen have a thermoplastic property which causes the material to become liquid aastm high temperatures and to harden at ambient temperatures.
Therefore, accurate viscosity analysis of bitumen at different temperatures has become an important test. The standard describes the manual measuring of determination of kinematic viscosity. A manual viscosity bath is used for the measurement of bitumen.
The time is measured astk a fixed volume of liquid to flow under gravity through the capillary of a calibrated reverse flow viscometer at a closely controlled and known temperature. The kinematic viscosity determined value is the product of the measured flow time and the calibration constant of the viscometer. Two such determinations are needed from which to calculate a kinematic viscosity result that is the average of two acceptable determined.
The standard describes the manual measuring of determination of dynamic viscosity. The viscosity in Pascal-seconds is calculated by multiplying the flow time in seconds by the viscometer calibration factor. Substitute for the commonly known mercury thermometers Free Tamcom software Range from Flow times between and seconds are recommended.
ASTM D prescribes reverse flow viscometers. ASTM D prescribes vacuum viscometers. The viscometer has to be suspended in a vertical position. This is possible with the special design of the covers used in the Tamson viscosity baths and the Tamson stainless steel viscometer holders.
These are available for most viscometers, please see WWW. COM for further information.
Human reaction time is ashm. So, fault of Tamson timer when measuring one hour is three times less than human error viscosity flow time is between and seconds. New design and electronics since Since introduction, thousands installed.
In every continent and most of the countries worldwide you can find a TV or TV Dominant standard in petrochemical labs. When asttm to tap water or an external cooler, sub ambient temperatures can be reached. Some competitors just state the standard deviation of the mean or mention the stability for a few minutes. But what is the consequence for the viscosity result if the bath temperature is varying by 0.
Sample 2 Time [sec. The results of the six tests are mentioned in the table. Row 2 gives the duration of a measurement in seconds, where the time is measured via two optical infra red sensors.
Rows 3 and 4 show the minimum and maximum temperature during a test. Row 5 demonstrates the difference between the maximum and minimum temperature. Row 6 gives the average temperature of the bath during a test. For sample 1 it is calculated as follows: The average in table 2 is taken from the five other samples.
The deviation is calculated by dividing the v by the average of the five samples. The delta in temperature is And the deviation in the measuring result is Based on this experiment, we can conclude that a slight temperature variation by only 0.
ASTM D – 01 Standard Test Method for Viscosity of Asphalts by Vacuum Capillary Viscometer
It is also very important that the bath temperature is as stable as possible in order to get the most accurate results. Cover of TV astj three holes four optional. Cover of TV offers seven holes eight optional. It is highly energy efficient 6 Watts.
Outside window pane can be removed by unscrewing the four black screws which is very easy. For safety reasons the tap can only be opened by using a screwdriver.
ASTM D – 07 Standard Test Method for Viscosity of Asphalts by Vacuum Capillary Viscometer
For this reason the overflow outlet must be connected to a waste container. This circuit board offers several nice features: Therefore, we show a two decimal readout in the display. Optional is a three decimal readout. This way the temperature reading on the display can be synchronised with an independent separate thermometer. This is very important when temp is e. With the additional 0.
This maximum power can be selected to prevent overshoot or burning of asttm media.
Viscosity of Bitumen ASTM D2170, EN 12595, ASTM D2171, IP 222, EN 12596, AASHTOT 202 Rev 1.01.
Four stages are available: The value is displayed with a resolution of 0. This is a good explanation as to why the bath temperature is not stable. If necessary, the PID settings can be manually adjusted to get the best optimum.
As an example, we show below a graph off an unstable bath. All other awtm stay the same. By using the RS communication port, the controller can be controlled remotely using the Tamson software, or a serial terminal, or your own software. The bottom layer has the standardized 51 mm openings as prescribed by ASTM D and related methods and the upper layer has wider openings to accommodate our stainless steel holders.
Viscometer holders also have a cover consisting of the layers. In the picture, you can see an example of our TV cover.
Tamson stainless steel holders will fit into the openings of the covers used in our viscosity baths xstm.
Prevent the holders from shifting position when, for example, silicon tubing is connected to the viscometers in order to apply vacuum. Viscometer tubes will not move due to the bath fluid circulating inside the viscosity bath. Tamson can guarantee that the viscometer in its stainless steel holder is aligned at a 90 degree angle to the cover as prescribed in ASTM D kinematic viscosity is determined using gravity.
The Tamson stainless steel holders are widely used and popular among users due to a robust design. The insulated handle makes it easy and safer to remove the viscometer even at high working temperatures.
Another advantage of the Tamson holder is the clamp at the bottom of the holder, which makes it impossible for the viscometer to fall out of the holder. Breakage of the glass viscometers can easily happen with the rubber and plastic holders available on the market currently. Remove bath from packaging material.
D21771 inner bath thoroughly of any loose packing materials, etc. Place the satm spirit level. The four supporting feet can be turned in and outwards for exact adjustment. Use a mains supply that is well earthed and clean of interference and can carry the load of the bath. The bath has to be filled with a liquid suitable for operating temperature.