The ReCAP LVR-DCP package is well suited for road practitioners and trainees. A laboratory test module for testing and evaluating the strength of imported pavement materials.Assessment of the attained pavement balance against ideal pavement balance curves.Easy identification of uniform sections for optimised pavement design based on representative average DN values for each layer, adjusted for expected long-term pavement moisture regime.Layer Strength Diagrams (LSD) with weighted average DN values for each 150 mm in-situ layers down to a depth of 800 mm used to determine the appropriate design intervention.Single and multiple DCP data point analysis which enables the user to identify localised problem spots or sections, most often related to drainage problems, for which specific measures must be taken without affecting the overall design.In the upgrading of the software, emphasis has been put on making it as intuitive and accessible as possible for the inexperienced users and a hyperlinked help file is available for this purpose. Long Term Pavement Performance (LTPP) monitoring of these sections is being carried out to collect additional in-service performance data to feed into the future revision of standards and specifications contained in current catalogues. The simplicity and ease of use of the DCP makes it ideally suited for characterising the in situ strength of existing roads as well as for designing their upgrading to a paved standard. Under AfCAP Phase 1, the DCP-DN pavement design procedure was developed and trialled successfully in a number of countries in Africa. This has been achieved by utilising the cone penetration rate (DN value) directly as a design parameter rather than the less reproducible CBR value. Since then it has been developed through research into a full-fledged method for the structural design of low volume paved roads that avoids the use of direct correlation with the California Bearing Ratio (CBR) test. The Dynamic Cone Penetrometer (DCP) is a well-established, non-destructive testing device that has been used in Africa and other regions of the world since the early 1970s for the in situ estimation of subgrade strength.
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