Paper by QUINTANA BORREGO CASTILLA VERA from ISCR 11th 2010 Seville Spain
Marchena bypass is a ring road which will run in the south of Marchena, in Sevilles province. Its total length is 7,6 km, and its cross section is 10 m in the coronation of the pavement. After deciding the placement of the concrete pavement, the specific type chosen was the continuously reinforced concrete pavement (CRCP). The reason of this final election was, fundamentally, the low bearing capacity of many soils in the route of the road. The subgrade layers (under the pavement) are, from bottom to top, 60 cm of stabilized soil with lime (S-EST2) and 30 cm of cement-stabilized soil (S-EST3), which were used to increase the bearing capacity of the original soil. Above that, 15 cm of lean concrete and, in the upper layer, the continuously reinforced concrete pavement, which is 19 cm thick. The concrete that will be used in the pavement is a 4,5 MPa obtained in flexural strength test. In this paper, the design and the construction process of the work will be shown.