Load transfer mechanism for jointed plain concrete pavements: A review
By: Khichad, Jeetendra Singh
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Contributor(s): Vishwakarma, Rameshwar J.
Publisher: Mumbai ACC LTD 2022Edition: Vol.96(7), Jul.Description: 35-45p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: Sustainable and efficient transportation infrastructure is the main requirement of developing countries like India. Road construction plays an important role for the development. Among the numerous pavement types used in road construction, the rigid pavements are proved superior than others in factors like durability, reduction in maintenance, and temperature susceptibility. The initial cost of construction of concrete pavements is more but it can be optimized by proper design and construction practices. Jointed plain concrete pavements (JPCP) are constructed with the joints at certain spacing on the road. Various factors such as concrete properties, loading types, wheels positioning, and joint spacing between slabs affect the load transfer mechanism at the joints. In JPCP effective load transfer at the joints take place either by shear action using aggregate interlock or by providing mechanical devices such as dowel bars. This paper critically reviews the load transfer mechanism at joints. A detailed study is carried out on the behavior of pavement considering factors which affect the efficiency of joints. The article concludes with important recommendations which can enhance the performance of concrete pavements. The factors like aggregate interlocking, dowel bars, misalignment of dowels, size of voids beneath the slab, and crack width are considered to analyse the effect on the load transfer at joints. From the review of literature, it is seen that the dowel bars must be provided for thicker pavements carrying heavy traffic. Proper alignment of the dowel is necessary for the better load transfer at joints. Misalignment of the dowel may lead to failure due to cracking of slab.
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Articles Abstract Database
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2022-2366 |
Sustainable and efficient transportation infrastructure is the main requirement of developing countries like India. Road construction plays an important role for the development. Among the numerous pavement types used in road construction, the rigid pavements are proved superior than others in factors like durability, reduction in maintenance, and temperature susceptibility. The initial cost of construction of concrete pavements is more but it can be optimized by proper design and construction practices. Jointed plain concrete pavements (JPCP) are constructed with the joints at certain spacing on the road. Various factors such as concrete properties, loading types, wheels positioning, and joint spacing between slabs affect the load transfer mechanism at the joints. In JPCP effective load transfer at the joints take place either by shear action using aggregate interlock or by providing mechanical devices such as dowel bars. This paper critically reviews the load transfer mechanism at joints. A detailed study is carried out on the behavior of pavement considering factors which affect the efficiency of joints. The article concludes with important recommendations which can enhance the performance of concrete pavements. The factors like aggregate interlocking, dowel bars, misalignment of dowels, size of voids beneath the slab, and crack width are considered to analyse the effect on the load transfer at joints. From the review of literature, it is seen that the dowel bars must be provided for thicker pavements carrying heavy traffic. Proper alignment of the dowel is necessary for the better load transfer at joints. Misalignment of the dowel may lead to failure due to cracking of slab.
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