Precision Estimates of AASHTO T148: Measuring Length of Drilled Concrete Cores (2010)

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12 APPENDIX A- INSTRUCTIONS AND DATASHEET FOR AASHTO T148 ROUND ROBIN STUDY

13 Instructions to the Participants of the Round Robin Study for Developing Precision Estimates for AASHTO T148,” Measuring Thickness of Concrete Elements Using Drilled Concrete Cores” Please follow the instructions below to measure length of the supplied concrete cores: 1. Follow AASHTO T148 (ASTM C 174) to measure length of each of the six concrete cores. Record the measurements to the nearest 0.1 mm as “Trial 1” in the provided work sheet. 2. For each of the six cores, repeat the length measurements 4 more times. Record the measurements to the nearest 0.1 mm as “Trial 2“, Trial 3“, “Trial 4“, “ Trial 5” in the provided work sheet. Note 1: It is important to conduct one complete set of measurements on all six cores before performing the next round of measurements. Note 2: For each round of measurements, place the core in the apparatus in complete random position to avoid repeating the measurements in the same locations as the previous rounds of measurements.

14 AMRL Round Robin Study for Determining Precision Estimates of AASHTO T148    Data Sheet for Length Measurements of Concrete Cores  (to the nearest 0.1 mm)    Core ID  Trail #  Center  Point  Position  1  Position  2  Position  3  Position  4  Position  5  Position  6  Position  7  Position  8  LT 523  Trial 1  LT 523  Trial 2  LT 523  Trial 3  LT 523  Trial 4  LT 523  Trial 5  LT 425  Trial 1  LT 425  Trial 2  LT 425  Trial 3  LT 425  Trial 4  LT 425  Trial 5  LT 1119  Trial 1  LT 1119  Trial 2  LT 1119  Trial 3  LT 1119  Trial 4  LT 1119  Trial 5  LT 755  Trial 1  LT 755  Trial 2  LT 755  Trial 3  LT 755  Trial 4  LT 755  Trial 5  LT 2894  Trial 1  LT 2894  Trial 2  LT 2894  Trial 3  LT 2894  Trial 4  LT 2894  Trial 5  LT 659  Trial 1  LT 659  Trial 2  LT 659  Trial 3  LT 659  Trial 4  LT 659  Trial 5