scope:

These test methods cover testing of concrete pipe, manhole sections, and tile. The test methods described are used in production testing and acceptance testing to evaluate the properties provided for in the specifications.

The test specimens shall not have been exposed to a temperature below 4°C [40°F] for the 24 h immediately preceding the test. The thermometer for measuring the temperature of the environment immediately surrounding the specimens shall meet the requirements of M 339M/M 339, with a temperature range of at least 0 to 25°C [32 to 77°F] and an accuracy of ±1°C [±1.8°F], that records the maximum-minimum temperatures (see Note 1).

Note 1-Thermometer types suitable for use include ASTM E1 mercury thermometers; ASTM E230/E230M thermocouple thermometer, Type T standard; IEC 60584 thermocouple thermometer Type T, Class 1 or 2; or ASTM E2877 digital metal stem thermometer.

If any test specimen fails because of mechanical reasons such as failure of testing equipment or improper specimen preparation, it shall be discarded and another specimen taken.

Specimens shall be selected in accordance with the specifications for the type of pipe or tile being tested.

The values stated in SI units are to be regarded as the standard. U.S. Customary units follow in brackets.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of R 18 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with R 18 alone does not completely assure reliable results. Reliable results depend on many factors; following the suggestions of R 18 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors.