Performance evaluation of cement stabilised road base using falling weight deflectometer.

This paper presents a case study where the Falling Weight Deflectometer FWD was used to determine the in situ stiffness of the cement stabilised road base at a trial section along the North-South Expressway in the Peninsular Malaysia. The FWD deflection measurements were used to check whether the design assumptions such as the compressive strength and the recommended material stiffness of the cement stabilised base layer (CTB) have been achieved during stabilisation. The improvement in the stiffness of the stabilised base layer was monitored during the trial. The FWD was found to be useful for the structural assessment and performance evaluation of the cement stabilised base layer prior to the placement of asphalt layers. Results from the FWD testing were also used to check if the assumptions used in the pavement design were met, thus ensuring that the finished pavement would achieve the required design service life. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E208431.