AS 1012.13:1992 PDF Download

AS 1012.13:1992 is a standard that outlines the methods for testing concrete to determine its drying shrinkage. The standard covers both laboratory-prepared and field-prepared specimens, as long as the nominal size of aggregate in the concrete does not exceed 40mm. The standard provides guidance on the preparation and curing of shrinkage specimens, as well as the measurement of length changes due to drying in air.

It should be noted that the precision statement in Clause 9 does not apply to specimens that have undergone non-standard initial curing, such as field-prepared specimens. The standard also requires that field-prepared specimens are properly marked, recorded, and reported as such.

While this test method is generally suitable for most concrete, it may not be suitable for very low slump concrete with a slump less than 20mm. This is because obtaining adequate compaction can be challenging. However, if adequate compaction is achieved, the method can still be applied. Additionally, although the method is primarily designed for measuring drying shrinkage, it can be adapted to measure length changes of specimens exposed to different environmental conditions.