p - Intersections

66 R.Andrei et al.
For option C1, presented in Figure 15, the bituminous surface course is laid on a
Rolled Compacted Concrete (RCC) base, supported by a granular base course, a
classical foundation, and a subgrade or improved subgrade.
For the option C.2, in Figure 16, the bituminous surface course is laid on a Steel
Fiber Reinforced Rolled Compacted Concrete (SFRRCC) base, supported by a
granular base course, a classical foundation, and a subgrade or improved subgrade.
Figure 16. Option C2 - Asphalt surface course on FRRCC base and granular subbase
General considerations concerning the envisaged options:
For options A and B, all pavement structures are recommended to be provided with
a surface treatment realized according to the following alternatives:
a) asphalt layer: a thin asphalt layer/ or slurry seal, double bituminous surface
treatment (double chip seal) or a heavy bituminous surface treatment (heavy
chip seal asphalt treatment);
b) thin polymeric layer (certified material);
c) surface mechanical processing plus alternatives a) or b).
All pavement structures will be provided with improved subgrade, function of the
geotechnical characteristics of the subgrade (foundation) soil.
For options C, by adopting the assumptions that, between the asphalt surface and
the concrete base there is no bonding, it is highly recommended that, for the
thickness design of the whole structure, the design studies to be conducted
separately for each layer, according the specific existing norms (Romanian and
other), as follows:
▪ for concrete base: “Technical Norm for Structural Design of Concrete Base
for Pavements”: NP 111-04, 2005,
▪ for RCC layers: recommendations from EcoLanes internal report [19].
Other specific norms to be used are the Romanian ones referring to the
establishment of performance criteria and composition of SFRC (GP 075 – 2002),
design of rigid pavements (NP 081 – 2002), execution of plain, reinforced and prestressed
concrete pavement layers (NE - 012 – 1999), execution of rigid pavements
with fixed and sliding forms (NE – 014 – 2002).