Preferred method of Contact: Ceramics, metals, slurries, pastes, pigments, plastics, mineral matter, building materials, and other materials can be examined by this method, which has density resolution of 0. Test results can be downloaded via the RS serial interface connector to an optional thermal printer.
|Date Added:||6 February 2018|
|File Size:||48.95 Mb|
|Operating Systems:||Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X|
|Price:||Free* [*Free Regsitration Required]|
If the density gradient of the column changes at any time the column can be quickly re-calibrated saving time or the necessity to create a new gradient for the column. Values to five decimal places are obtained. The volume of porosity open to the sample surfaces astj also be measured, allowing determination of apparent skeletal density or analysis of open-cell foams.
Density by water displacement Archimedean density since liquids other than water can be used for materials with densities less than 1.
Density Gradient Column for Polymers to ASTM D Method: Model , Testing Machines, Inc.
ASTM D uses a graduated glass column which is charged with two solutions, such that one is greater than aatm one less than the density of the material to be tested.
The liquid at the bottom of the column is of the axtm density and, as the column is filled, the density decreases until the top of the column contains only the lighter density liquid.
Pore Volume and Pore Size Distribution by Mercury Intrusion Non-wetting fluids, such as mercury can be forced into v within a solid material by application of pressure. Reload Image Please enter the letters from the image: Depending upon the nature of the specimen e. Depending on use or age the density distribution of the column can remain stable for up to 40 weeks. Once the correct position of the sample is recorded the density is displayed on the LCD screen.
Touchstone Research Laboratory, Ltd. True and Apparent Density by Helium Pycnometry This method provided a more rapid and more accurate measurement of true densities that does the Archimedean technique.
Deducting the mass of the suspension wire from the weight in liquid, the volume of the specimen is calculated from the effect of displacement by a liquid of known density Archimedean principle. Calibrated glass marker floats of precise known densities are introduced into the column and sink to a point where the density matches that of the solution.
Plastics | ASTMD | Prospector
Ceramics, metals, slurries, pastes, pigments, plastics, mineral matter, building materials, and other materials can be examined by this method, which has density resolution of 0. This basket is slowly lowered through the column without disturbing the density gradient distributing the 1055 spheres and specimens according to their relative densities.
Preferred method of Contact: Column filling speeds are variable from 0. All use basically the same procedure where the apparent volume of a regular shape usually a rectanguloid is determined by measurement of its dimensions.
Helium, under precisely-known pressure, is used to fill small voids within a specimen.
To replace the floats and new samples into the column simply reverse the sweep motor and lower them into the column. This method can be extended to high density materials if suitably dense liquids can be selected. A linear encoder which is attached to a trammel guide is used to calibrate the gradient of the column by focusing the optical microscope onto the centre of the calibrated float and entering the floats density value into the microprocessor.
Once test samples have asfm introduced into the column and have reached a point of static equilibrium they are accurately aetm using the microscope.
Density - ASTM D1505
The resulting solution has a density which when introduced into the column increases uniformly from top to bottom. Density by the Water Displacement ASTM C Density by water displacement Archimedean density since liquids other than water can be used for materials with densities less than 1.
In this method, the total pore volume and the distribution of pore sizes of a solid sample is determined by incrementally increasing the pressure of a mercury column above the sample and measuring the change in mercury height.
The density gradient will be uniform through the length of the column. The same specimen is weighed while suspended in water or other liquid of such density that the specimen will sink. To remove the polymer samples and glass marker floats simply turn on the automatic sweep mechanism and wait for the items to asm extracted from each column.
Density Testing: ASTM D1505 & More
A number of other methods for the measurement of density, including the following: The density range of the column is formed by mixing two fluids having different densities in the supplied glass flasks. The ratio of sample mass to its true sold volume gives its true density. This allows the determination of density of specimens with irregular shapes, uneven surfaces, or porosity.