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Effects of Interlocking and Supporting Conditions on Concrete Block Pavements

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Abstract

Concrete Block Paving (CBP) is widely used as wearing course in flexible pavements, preferably under light and medium vehicular loadings. Construction of CBP at site is quick and easy in quality control. Usually, flexible pavement design philosophy is followed in CBP construction, though it is structurally different in terms of small block elements with high strength concrete and their interlocking aspects, frequent joints and discontinuity, restrained edge etc. Analytical solution for such group action of concrete blocks under loading in a three dimensional multilayer structure is complex and thus, the need of conducting experimental studies is necessitated for extensive understanding of the load—deformation characteristics and behavior of concrete blocks in pavement. The present paper focuses on the experimental studies for load transfer characteristics of CBP under different interlocking and supporting conditions. It is observed that both interlocking and supporting conditions affect significantly on the load transfer behavior in CBP structures. Coro-lock block exhibits better performance in terms of load carrying capacity and distortion behavior under static loads. Plate load tests are performed over subgrade, granular sub-base (GSB), CBP with and without GSB using different block shapes. For an example case, the comparison of CBP with conventional flexible pavement section is also presented and it is found that CBP provides considerable benefit in terms of construction cost of the road structure.

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Authors and Affiliations

  1. Department of Civil Engineering, Indian Institute of Technology, Guwahati, India

    Geetimukta Mahapatra & Kuldeep Kalita

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  1. Geetimukta Mahapatra
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  2. Kuldeep Kalita
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Correspondence to Geetimukta Mahapatra.

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Mahapatra, G., Kalita, K. Effects of Interlocking and Supporting Conditions on Concrete Block Pavements. J. Inst. Eng. India Ser. A 99, 29–36 (2018). https://doi.org/10.1007/s40030-018-0267-x

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  • DOI: https://doi.org/10.1007/s40030-018-0267-x

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