Title: CONSTRUCTION OF JOINTS IN PLAIN CONCRETE PAVEMENT - A FIELD EXPERIENCE
Abstract: The construction of expansion joints in the concrete pavement of the Mumbai-Pune Expressway, India, is described. The expressway is a dual carriageway with three lanes in each direction. A bituminous paved hard shoulder is also provided on each side. The joint constructions in pavement quality concrete with slab thickness 350mm or 275mm are similar except for cutting depths of 100mm and 80mm respectively. Longitudinal and transverse joint construction are described. The sawing operations were carried out in two phases, namely initial sawing and later widening. The width of joints was determined depending on the movement accommodation factor of the sealants used considering thermal expansion and contraction of the concrete slabs. Initial sawing occurred as soon as the pavement was able to take the load of the sawing machine. Concreting at night gave more time during daylight for the initial sawing. Before sealing, the joints were cleaned thoroughly using compressed air jets. Cold pour polysulphide sealant (BS4254, 1993) was used in the longitudinal joints and preformed neoprene compression seals were used (ASTM D 2628 and AASHTO M-220) in the transverse joints. The methods of installation of these sealants are described. Careful attention to joints and their sealing is expected to reduce future maintenance costs.
Publication Year: 2002
Publication Date: 2002-07-01
Language: en
Type: article
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