SL 135-2017 in English

The document provides a detailed methodology for the calibration of instruments used to measure the dynamic elastic modulus of concrete. It outlines the technical requirements, calibration procedures, and verification methods necessary to ensure the accuracy and reliability of measurements. The content covers aspects such as equipment specifications, environmental conditions during calibration, and the steps involved in conducting the calibration process. Additionally, it includes guidelines for the maintenance and use of the instruments to ensure consistent performance. The document serves as a reference for professionals involved in the testing and evaluation of concrete materials, offering a standardized approach to the calibration of dynamic elastic modulus measurement devices.