The project solves the revitalization of Portland cement concrete (PCC) pavement at the end of their lifetime through the segmentation and subsequent overlay of the existing PCC pavement by bituminous layers.
The project adjusts this technology to the specific conditions of the PCC road construction in the Czech Republic, elaborates the methodology of rehabilitation and verifies the functional properties and durability of this technical solution based on a special bituminous crack relief layer.
- The results of the project are as follows:
- The stress absorbing asphalt layer - the stress absorbing asphalt layer, which contains aggregates of various fractions according to grain size and rubber modified asphalt granulate. The grading curve is adjusted so that the aggregate size distribution curve by sieve analysis complying with the equation Pd <Yd. Pd is pass of aggregate in weight (percentage), determined on a sieve of size d. Yd = (d / D) ^ 0.5 * 100.
- Methodology for determination of the optimal segmentation step of cement conrete pavements - the methodology is focused on segmentation of unreinforced cement concrete pavement (CCP) with joints (without dowels and anchors) using a guillotine. The methodology describes the following measures to ensure the optimal segmentation step on the old CCP: evaluation of variability of bearing capacity of a road intended for segmentation, selection of representative homogenous (uniform) section, assessement and evaluation of experiments in order to optimize the segmentation step. The proposed method is based on measuring the deflection of the road usig falling weight deflectometr FWD and evaluation of dynamic stiffness modulus ISM.