What is the thickness requirement for a plastic slump cone as per standard C143?

The thickness requirement for a plastic slump cone is specified in ASTM C143, which outlines the standards and testing methods for determining the workability of concrete. According to this standard, a plastic slump cone must have a minimum wall thickness of 0.125 inches, with no individual measurement being less than 0.100 inches.

This requirement ensures that the slump cone is sturdy enough to withstand the pressures exerted during the concrete testing process and provides consistent and reliable results. A cone that does not meet these thickness specifications may deform or fail to maintain its shape, thereby affecting the accuracy of the slump measurement.

The other choices listed do not align with the specified requirements of ASTM C143 for a plastic slump cone, making them incorrect. The thickness measurements provided in those options either exceed the minimum requirement or do not meet the minimum standard, leading to potential issues in the reliability of testing results.