Determination of the drying shrinkage of autoclaved aerated concrete

This technical specification establishes the standardized procedures for evaluating the drying shrinkage characteristics of autoclaved aerated concrete. The methodology outlines the specific conditions under which test specimens must be prepared, conditioned, and monitored to ensure consistent and reproducible results. It defines the necessary equipment, including precision measuring devices and controlled environmental chambers, required to capture dimensional changes over time. The protocol details the calculation methods for determining shrinkage rates, providing a clear framework for reporting findings in a uniform manner. By adhering to these guidelines, manufacturers and laboratories can reliably assess the dimensional stability of this lightweight building material under various drying scenarios. The approach ensures that data obtained from different facilities remains comparable, facilitating quality control and material verification processes. This document serves as a critical reference for interpreting the long-term performance of aerated concrete blocks used in construction applications, focusing strictly on the experimental steps and analytical techniques without addressing broader regulatory or strategic implications.