AS 4489.4.2:1997 (R2016) PDF Download

AS 4489.4.2:1997 (R2016) is a standard that provides guidelines for testing the soundness of limes and limestones using the Le Chatelier method. The Le Chatelier method is a well-established and widely used procedure for assessing the potential expansion and durability of these materials. The standard describes the specific test method for determining the average expansion of three specimens made from a mixture of hydrated lime, Portland cement, sand, and water.

The purpose of this test is to evaluate the soundness of limes and limestones, which refers to their ability to undergo minimal expansion or contraction when exposed to various environmental conditions. Soundness is an important characteristic to assess the durability and long-term performance of these materials, especially when used in construction applications.

The testing procedure involves subjecting the specimens to a water bath at a specific temperature for a specified period of time. The expansion or contraction of the specimens is then measured using a Le Chatelier apparatus, which consists of a split brass cylindrical mold. The average expansion of the three specimens is calculated and used as an indicator of the soundness of the lime or limestone under test.