Abstract

MACKELLAR, A  and  KEARSLEY, E. Concrete properties for ultra-thin continuously reinforced concrete pavements (UTCRCP). J. S. Afr. Inst. Civ. Eng. [online]. 2019, vol.61, n.4, pp.50-58. ISSN 2309-8775.  http://dx.doi.org/10.17159/2309-8775/2019/v61n4a5.

Ultra-Thin Continuously Reinforced Concrete Pavement (UTCRCP) is an innovative road paving technology that can have significant advantages over traditional road paving techniques. Tests have shown that UTCRCP can carry in excess of one hundred million E80s (standard 80 kN axle loads). The laboratory tests used for quality control of conventional concrete are not adequate to fully capture the effects of the steel fibres added to the high strength concrete used in UTCRCP. In this study the concrete strength and fibre content were varied and the mechanical and physical properties of the concrete were measured. The tests included compressive strength, split cylinder, modulus of elasticity and four-point bending slab tests. The results of these tests are reported in this paper, and the suitability and shortcomings of the tests are discussed.

Keywords : UTCRCP; ultra-thin continuously reinforced concrete pavements; fibre-reinforced concrete; energy absorption.

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