ASTM standard specimens

The compressive strength of the set sealant is measured with ASTM standard specimens of a (2 X 2 X 2 in. ) cube [6]. The slurry from the consistometer is poured in molds and is allowed to set in a curing chamber. It is then taken out after a desired period, and the strength is measured by applying a load on it in a uniaxial press. Knowing the total load and the area of the face on which the load is applied, one can calculate the compressive strength. 

ASTM standard specimens and procedures were used for flexure (D-690), compression (D 695), Izod impact and torsional pendulum analysis (TPA). For tension, D1822 tensile impact specimens were substituted for D638 specimens to conserve material. Test specimens were machined from the plates and cylinders using a water cooled dlamond wheel. All the specimens were dried in vacuo at 100°C for three weeks before testing or subsequent postcure treatment. Half the specimens were post-cured for 2 hours at 225°C in vacuo before testing. Selected specimens were Immersed in distilled water at 80°C for 6 weeks for moisture uptake determinations. 

A suitable volume-to-area ratio is 20 mL (125 mL) of solution/cm" (in ) of specimen surface. This corresponds to the recommendation of ASTM Standard A262 for the Huey test. The preferred vohime-to-... 

Mechanical Properties. The mechanical properties of thin, solvent-cast polymer films were measured on an Instron Tensile Tester according to ASTM standard D882-83. In all cases, tensile values were calculated from the average of at least four measurements obtained from four separate specimens per polymer sample. 

With small modifications, ASTM standard G48 can be used to determine a CPT. The test is used as a ranking parameter for the resistance to pitting of high-alloyed austenitic stainless steels. In this method, material coupons are typically exposed for 24 or 72 h to a 6% FeCl3 (=1.11 mole/liter) solution at fixed temperatures (typically with 2.5°C intervals). The CPT is defined as the lowest temperature at which the specimen is attacked by pitting corrosion. 

Tensile and tear strengths were determined using ASTM standards D412 and D1004, respectively, at a crosshead speed of 0.42 mm/s (1 In/mln) values reported are the average for 3 specimens. The elastic and Inelastic (plastic) components of the total elongation... 

Because of reasons mentioned above the preparation, the dimensions, and the pretreatment of the test specimen have been standardized (DIN standard or ASTM standard). The important characteristic values of technical polymers are listed in databases (Campus, Polymat). 

N = normality of the NaOH soln Retest. Retest the lot if the results of tests of the composite and the individoal samples vary over a range greater than 0.335 Water. Determine the water content of a 50-ml specimen of the EtnO as specified in ASTM Standard D1364. Calculate the weight of the specimen tested using the specific gravity of the ethylene oxide determined by means of a suitable hydrometer... 

Property to be Measured ASTM Test Standard Specimen Dimensions Test Molding Sample Weight per Molding (grams)... 

Tensile properties of the blends were measured according to ASTM standard D638-84 [ 11] using type I specimens which were cast in a manner identical to that used to prepare DMA test specimens. The specimens were polished to a 1 jum finish on all surfaces and stored in a desiccator until tested. 

Emission test chambers, cells and analytical procedures are now standardized by ISO, ASTM and other authorities (see Table 5.1). However, it is interesting to note that only the ASTM standards take sink effects (see Section 5.3) into account Different types of testing facilities have different properties regarding amount of test specimen, dynamics, time, result and cost. In a small device the test is generally time efficient, but on the other hand sample inhomogeneities will significantly influence the results. In Figure 5.3 some trends are shown in dependency of the chamber/cell size. 

Standard Method for Microscopical Determination of the Reflectance of the Organic Components in a Polished Specimen of Coal. In 1987 Annual Book of ASTM Standards, Petroleum Products, Lubricants, and Fossil Fuels, Section 5, Volume 05.05, D2798-85, ASTM Philadelphia, 1987 pp 367-370. 

ASTM E 1995, Standard Test Method for Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber, with the Test Specimen Oriented Horizontally, Annual Book ASTM Standards, American Society for Testing and Materials, West Conshohocken, PA. 

Hydrogen homogeneity was controlled by metallographic examination. Metallography of hydride structure on radial-axial and radial-transverse sections shows a uniform hydride distribution with hydrides elongated in the longitudinal direction (Fig. 1). From the hydrided pressure tube material curved compact toughness (CTT) specimens were machined. Except for the thickness and the curvature of the tube, the in-plane dimensions of specimens were in proportion described for compact specimen in ASTM standard test method (E-399). 

ASTM E 23-66 was applied for the dimensions of standard specimens except that the mat reinforced specimen (GC 33 wt % ) used ASTM D 256-56. Specimens were taken from a molded plate along the longitudinal fiber direction, and V notches were cut edgewise, perpendicular to both fiber direction and molding surface. Occasionally a specimen notched on the molding surface (flatwise) was used. Tests were performed with an instrumented Charpy impact tester (10) with a 30 kg-m or 150 kg-cm capacity. Test temperatures were varied from — 196°-250°C. 

The resonant beam test technique forms the basis of the ASTM Standard E756-83 for measuring the viscoelastic properties of damping materials. Fundamentally, the beam test requires that the resonant frequencies of a metal-beam, mounted in cantilever fashion, be determined as a function of temperature and frequency the beam is then coated with a polymer and the resonant frequencies and corresponding modal damping of the composite beam are determined as a function of temperature and frequency. From these two data sets, the vibration damping properties of the polymer can be evaluated. The ASTM Standard provides the necessary equations to obtain the complex modulus data from the collected test data and also provides guidelines for the proper choice of the specimens (1.21. The principal difference between the beam test and the other methods used here is that the beam test calculates the material properties from the test results on the metal beam and the composite beam whereas the... 

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