1. Rationale
The current wording in this section requires the monitoring of the condition of the elastomeric pads used in the in the unbonded capping system for testing concrete cylinders. It further called for replacement of pads with cracks or splits in excess of 3/8 of an inch. A study conducted at NRMCA entitled Tests of Used Unbonded Caps found that pad wear did not contribute to a significant reduction in strength. A copy of the paper can be found at http://www.ccrl.us/Lip/PadCapStudy.pdf. The ballot eliminates the requirement to replace pads that are cracked or split.
Keywords
cap; compressive strength; concrete; concrete test; elastomeric; neoprene; pad cap; rubber; unbonded cap; Capping concrete materials/applications; Compression testing--cement/concrete; Concrete; Concrete strength; Neoprene; Pads; Rubber; Unbonded capping system;
Citing ASTM Standards
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