Climate pavement adaptability is an integral part of a holistic concept of road design, construction, and pavement management. One of the possibilities for fulfilling the mentioned author’s premise in sustainable cycle pavements in the cold region of Central Europe is using composite foam concrete (CFC). To establish the credibility of the design of these pavements, we objectified the correlation dependencies of average annual air temperatures and frost indexes, for altitude regions from 314 to 858 m in the period 1971 to 2020, at its height above sea level. As part of the research on the increase in tensile strength during bending of CFC, extensive laboratory measurements were carried out and validated by isomorphic models of real roads, which enabled an increase in tensile strength during bending from 0.376 to 1.370 N·mm⁻² for basalt reinforcing mesh. The research results, verified through FEM (Finite Element Method) models of cycle pavements, demonstrated a possible reduction of total pavement thickness from 56 to 38 cm for rigid pavements and 48 to 38 cm for flexible pavements.

This article presents the case study of our research in the field of innovative methods of pavement subgrade quality control using the CIST (Clegg Impact Soil Tester) device. The CIST device developed by Dr Clegg from the University of Western Australia measures soil compaction indirectly using the CBR value. The value is evaluated based on the deceleration rate of a falling 4.5 kg weight moving in a vertical guide roller. In Europe, for the assessment of the mechanical efficiency (bearing capacity) of cohesive soils in the pavement subgrade, priority is given to indirect assessment methods especially using the laboratory determination of CBR (Californian Bearing Ratio) and directly through the implementation of a static plate load test (SPLT). This article reports the long-term results of our research in the field of verification and validation of an innovative CIST device, which minimizes the time, space, and economic disadvantages of SPLT. This article presents the results of determining the field of applicability of the CIST device for cohesive soils, the correlation dependencies (CD) of the CBR values determined by the CIST device, and, according to STN 72 1016, the CD of the impact dynamic deformation modulus E_vd from the CIV (Clegg Impact Value). We consider the most important results of our long-term research to be a recognition of the ability of CIST to assess the quality of cohesive soils up to a compression value of 40 mm, corresponding to a CBR of 2.2% and a modulus of subgrade deformation of 20 MPa. A very strong correlation dependence of CBR_Clegg [%] on the moisture content of clayey soils in the interval from 5 to 19% was also observed. The presented knowledge led to the creation of relevant documents for the credible implementation of the CIST device in the system approach for assessing the quality of the pavement subgrade.

The article presents the possibilities of recovery of waste from the automotive industry, specifically old tires, in road constructions. The authors demonstrate the re-utilization of these wastes as a binder in pavement layers. The application of shredded rubber creates the conditions for devulcanization, which improves the rheological properties of the binder and ensures its better dissolution in the asphalt. Such pavements then significantly improve their surroundings, compared to standard technologies. Attention is focused on the assessment of the pavement surface condition, measurement of noise levels in the road surroundings, quantification, and evaluation of the cost of implementing a pavement design with CRM. A visual inspection was conducted after six years of pavement life cycle operation. Based on the inspection outputs, the pavement surface texture was in a favorable condition with no permanent deformations. The acoustic performance verification demonstrated a noise reduction compared to the road section with a modified asphalt pavement surface. Currently, the price of rubber-modified asphalt for the pavement layer is on average 10-15% higher than other modified mixes in Slovakia. Based on the presented results, we can say that pavements with CRM are economically and especially environmentally more advantageous in the long term.