Distress Evaluation of Plastic Cell Filled Concrete Block Pavement

This paper describes a systematic full scale experimental study to evaluate various distresses of plastic cell filled concrete block pavement (PCCBP) of different thicknesses (50 mm, 80 mm, 100 mm, 120 mm and 150 mm) based on pavement condition index (PCI) methodology. Due to the similarities in load transfer mechanism between interlocking concrete pavement and PCCBP, and in the absence of standards and guidelines for evaluation of PCI for PCCBP, the Interlocking Concrete Pavement Distress Manual, published by the International Concrete Pavement Institute (ICPI), Toronto, Canada, has been adopted. Four distresses, viz., 1) damage pavers, 2) depression, 3) faulting, and 4) rutting, as mentioned in the ICPI distress manual, and four new distresses specific to PCCBP, viz., 1) edge spalls, 2) scaling, 3) exposed cells, and 4) cell opening are identified. Distress evaluation of PCCBP test sections (after 62,000 equivalent single axle load (ESAL) passes of 80 kN) based on the ICPI distress manual showed that the test sections can be rated as ”fair” (50 mm thick) to ”very good”' (150 mm thick). A relatively high elastic modulus (1,800 MPa) was observed for the thin PCCBP layer (50 mm thick), even after a wheel load repetition of 62, 000 passes, suggesting that PCCBP with ”waste stone dust” as replacement for the traditional river sand can be a promising alternative for rural roads.

並列關鍵字

Distress ； Falling weight deflectometer (FWD) ； Low volume roads ； Pavement condition index ； Plastic cell filled concrete block pavement (PCCBP)

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