Optimization of low volume road pavement design and construction

Abstract

Low volume roads in the Czech Republic are roads with lower traffic volume that primarily include forest and field roads, and they are an integral part of the Czech transport network. When building road pavements, we can use processes for surveying, designing, building and inspecting road constructions included in national and international, particularly European, standards. In addition, the roads are evaluated in terms of their environmental impacts, in order to maintain the quality of the environment. However, during the construction of road pavements decisions based on financial, time and other reasons are made. The decisions have impacts on the operation of roads and lead to other measures and additional costs of repairs and reconstructions. The article summarizes the authors’ research results from constructions of low volume road pavements and contains evaluations of laboratory and in situ material tests (soils, layers) of installed road pavements as well as evaluations of modelled laboratory and long-term monitored in situ structures.

An Updated Cyclic CBR Test with Realistic Stress Values under the Plunger for Resilient Modulus Calculation

“…The deformation behavior, stiffness, and strength, as well as the variability of mechanical properties, depend on many factors. These factors include soil genesis, soil type, the lay-off of unbound materials, compaction rate given by the Proctor Standard energy, liquid phase amount, the number of repeated loading cycles, and maximum load-bearing capacity [4,7,8]. The resilient modulus should consider these factors [9] and should be obtained from an appropriate laboratory test that realistically simulates expected loadings by repeated passages of transport vehicles and taking into account the expected state of stress in an actual structure.…”