Construction of Pretensioned Precast Concrete Pavement
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RESEARCH PAPER
Construction of Pretensioned Precast Concrete Pavement Ameen Syed1 · Ranjan S. Sonparote1 Received: 27 December 2018 / Accepted: 19 June 2020 © Shiraz University 2020
Abstract The need for fast construction of pavement has compelled agencies throughout the world to look into the application of prestressed precast concrete pavement (PPCP) technology. In this technology, precast pavement panels are prepared in a casting yard and later transported and placed on the prepared base at the required site. This technology not only provides fast construction but also provides a higher quality of pavement. In this paper, an application of PPCP has been described. A simple method for the design of PPCP has been proposed. Based upon this design, a 24 m road length has been implemented. The panels are provided with top dowel slot load transfer mechanism. The behaviour of the panel has been studied and is still under observation. Keywords Prestressed concrete pavement · Precast concrete pavement · Pretensioned · Prefabricated pavement · Pavement construction
1 Introduction Due to the increasing traffic all over the world, there has been a surge in the demand for fast construction. Hence, the construction industry has largely shifted to precast construction practices. Precast building and bridge construction have been in practice for decades. The application of precast panels for pavement construction has also gained high popularity in the last decade, and multiple pilot projects have been executed using this technology throughout the world. Two of the major issues faced with cast-in place concrete pavement (CIP) construction are the duration of construction and the difficulty in maintaining the construction quality. The duration of construction not only increases the construction cost but also increases the user cost due to excessive fuel consumption. In order to overcome these problems relating to the construction of concrete pavement, precast concrete pavement (PCP) technology has gained popularity. Application of PCP technology allows construction of pavement in one-third of the time required for that of CIP. Further, addition of prestressing to the panels allows the use of thinner sections which leads to a considerable material saving. In * Ameen Syed [email protected] 1
this technology, the pavement panels are cast in a controlled environment of a casting yard where good quality of panels can be produced. Any panel that is not up to the required standard can be rejected at the casting yard itself. Once the panels gain the required strength, they are then transported to the construction site. The panels are then placed on a prepared sub-base. PCP provides an excellent solution for providing fast and durable concrete pavement construction. However, there are a few problems due to exposure to extreme environmental conditions that can reduce the life of the pavement and cannot be addressed by PCP. Researchers have made several attempts to address these issues. Concrete cured in harsh environmental co
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