Reference Specifications for Civil Engineering Work 2001

3.7Degree Of Saturation

General: Where directed by the Superintendent, determine degree of saturation of the pavement layer if excessive moisture content is suspected. Sources of water entry during the construction phase may include inadequate pavement surface drainage, exposure of surface to rain, pavements left primed but not sealed for extended periods, use of high moisture content for compaction, and excessive watering of the pavement.

Test method: Determine degree of saturation in accordance with Queensland Department of Main Roads test method Q111D. Perform test within a period of 6 hours prior to the placement of the next pavement layer or surfacing.

Moisture content limits: Limit the maximum degrees of saturation to 65% for Class 1 material, and 70% for Class 2 and Class 3 materials. Where the moisture content limits are exceeded during construction, dry back pavement prior to covering with the next layer of pavement or surfacing.