Forgot your password? Work with us to find the right equipment for your ASTM standard. Summary of Test. ASTM C Concrete Compression Testing ASTM C testing provides a stress to strain ratio value and a ratio of lateral to longitudinal strain for hardened cylindrical concrete at whatever age and curing conditions may be designated. Testing Procedure.
This involves applying a compressive axial load until failure occurs. Place the specimen on the platen so the axis of the specimen is aligned with the center of thrust of the spherically seated bearing block. Enter now!. Align the axis of the specimen with the center of thrust of the spherically astm c bearing block and slowly bring the block to bear load on the specimen.
Astm c Deflectometer Deflection Gauge. Standard load ratings up to kN 67, lbf astm c higher ratings available upon request Platen diameters astm c 56 mm to mm 2. The modulus of elasticity values obtained will usually be less than moduli derived under rapid load application dynamic or seismic rates, for exampleand will usually be greater than values under slow load application or extended load duration, given other test conditions being the same.
If repeatable, average the results. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique astm c Work with us to find the right equipment for your ASTM standard.
Record any unusual limeters to the nearest 0. Carefully align the axis of the specimen with 4. Note the reading on the strain indicators. As the. Calculation 6. Do not record any data 7. Base calculations on the average of the 50 psi Set testing machines of the 7.
Longitudinal strain is defined as the duced by stress S1. Report length. If Poissons ratio is to be determined, record the transverse strain at the same points. If a stress-strain curve is to 8. Immediately upon reaching the 8. If the observer 8. Record the extra cycle in the report.
Precision and Bias 9. Keywords abscissa and the compressive stress as the ordinate. Calculate ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
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Open navigation menu. Close suggestions Search Search. User Settings. Chord modulus of elasticity and Poisson's ratio are defined in Terminology E 6.
Referenced Documents 2. E 83 Practice for Verification and Classification of Exten- someters! Significance and Use 3. Apparatus 4. The effective length of each gage line shall be not less than three times the maximum size of the aggregate in the concrete nor more than two thirds the height of the specimen; the preferred length of the gage line is one half the height of the specimen.
Gage points may be embedded in or cemented to the specimen, and deformation of the two lines read independently; or a compressometer such as is shown in Fig. Procedures for calibrating strain-measuring devices are given in Practice E Nore I—Although bonded strin gages ae satisfactory on dey specimens, they may be difficult, if not impossible, to mount on specimens continually moist-cured until est.
If these distances are not equal, the transverse deformation of the specimen diameter may be calculated in accordance with Eq 2. Test Specimens 3. C42, except that only diamond-drilled cores having 2 length-to-diameter ratio greater than 1. Requirements relative to storage and to ambient conditions immediately prior to test shall be the same as for molded cylindrical specimens. I the specimen as cast does not mect the planeness requirements, planeness shall be accomplished by capping in accordance with Practice C , or by lapping, or by grinding, Aggregate opouts which occur at the ends of specimens may be repaired provided the total area of popouts does not exceed.
Planeness will be considered within tolerance when a 0. This average diameter shall be used for calculating the crosssectional area. The length of a drilled specimen shall be messured in accordance with Test Method C; the length, including caps, shall be reported to the nearest 0.
Procedure 6. Record any unusual fuctuation in temperature or humidity in the report.
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