| 摘要 |
A testing device which will provide accurate in-site strength measurement of cast cementitious material. One or more such testing devices are cast into the cementitious material at the time of manufacture or construction of a component. At such future time as it is desired to know the strength of the cementitious material in the component an external force is applied to the protruding shaft of one of the testing devices. The force is gradually increased until rupture occurs in a precisely metered portion of the cementitious material affected by the testing device. The magnitude of force required to cause rupture is proportional to the strength of the cementitious material. Tests can be made at various times to assure adequate strength of the cementitious material for mold removal, stress loading and specified ultimate capacity.
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