Reflective Cracking on Concrete Pavements with Cement Treated Sub-Base

Paper by VALE from ISCR 6th 1990

One concrete pavement just built was showing some located transverse cracking. In order to evaluate the cracking cause, longitudinal displacements were measured in some cracks and transverse joints. Results obtained showed that concrete cracking was reflected from cement treated base cracks, and allowed to verify that such phenomena happened in locations where the distance between base cracks was larger. In order to prevent from future problems there may be two solutions: 1. Assuring that treated sub-base layers do not show large crack distances, forcing, whenever it happens, additional cracking. 2. Changing concrete transverse joints location in order to obtain coincidence with sub-base cracking.

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