Work Item
ASTM WK68393

New Test Method for Standard test method for determination of thermal resistivity of Cementious Products by thermal needle probe procedure

1. Scope

(1) The assembling and study of data pertaining to the properties of hydraulic-cement concrete and its constituent materials, including the study of the effect of characteristics of materials and mixture proportions upon the properties of concrete; and (2) the development of standards for concrete and for the constituent materials of concrete (except cement), as well as for certain related materials, such as materials used in curing or repair of concrete.
2.2 The scope of the Committee does not include the field of design and construction of concrete structures except insofar as references need to be made to construction methods in special cases of concrete as “over- the-counter” material.

NOTE: In accordance with an agreement between ASTM and the American Concrete
Institute (ACI), ACI will refrain from specification writing for “over-the-counter” engineering materials and ASTM will refrain from standardization efforts in design and construction practice.


Thermal backfill; thermal concrete; thermal meter, thermal needle probe


Currently there are no standards that cover a procedure for determining the Thermal resistivity of a cementious material. Currently each individual or group testing for thermal resistivity, have been left to develop their own procedures. This is causing a disconnect between the electrical engineers and testing. Testing can not ne verified. Because there are no standards, in many cases the relationship between thermal resistivity and moisture content is not being established. This standard would be used for all cementious product placed around electrical conduits where knowing what the thermal resistivity (or displacement of heat)is critical. The end users will be Ready Mix companies, private labs, project owners, and others.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: C09.64

Committee: C09

Staff Manager: W Scott Orthey

Work Item Status

Date Initiated: 05-21-2019

Technical Contact: Tim Whitehall

Item: 000