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Fracture and Mechanical Performance of Two-Lift Concrete Pavements Made of Roller Compacted Concrete and Polypropylene Fibers

Project Details
SOURCE

TRID

START DATE

10/29/20

END DATE

01/25/21

RESEARCHERS

Mohsen Ahmadi, Gholam Ali Shafabakhsh, Abolfazl Hassani

SPONSORS

Elsevier Ltd.

KEYWORDS

Concrete pavements, Flexural strength, fracture properties, Mechanical properties, Polymer fibers, Polypropylene, Roller compacted concrete

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Project description

The present study has examined the two-lift concrete pavement (2LCP) fracture and mechanical behavior by casting the Roller Compacted Concrete (RCC) as the bottom lift and the conventional or fibrous portland cement concrete (PCC, FPCC) as the top lift. To this end, the three-point bending test was carried out on notched beams by considering different thicknesses for both layers. Results showed that fibers had no positive effects on the compressive and flexural strength, but improved the post cracking behavior considerably. Compared to full-depth RCC/PCC, 2LCP specimens had similar flexural strengths, but an increase in the FPCC top-layer thickness increased the fracture energy noticeably.
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