Published: 2023-03-31

Cracking resistance of recycled mineral-cement-emulsion mixtures

Łukasz Skotnicki , Jarosław Kuźniewski

Abstract

Recycling enables reduction in usage of natural resources in road construction, positively affecting its environmental aspects. Construction materials obtained through recycling include mineral-cement-emulsion (MCE) mixtures, which are used in road pavements as base courses. MCE mixture consists of aggregate, added aggregate that improves gradation, bituminous emulsion and cement. Aggregate may be substituted with reclaimed asphalt material obtained from deteriorated pavements. Use of cement in pavement structure generates cracks that propagate upwards through the upper layers. When innovative binders are used instead of pure cement, the number of cracks may be reduced, improving the life of the entire pavement structure. The article presents selected problems pertaining to MCE mixtures produced using an innovative cement-based binder incorporating cement by-pass dust (CBPD). The performed laboratory tests encompassed fatigue life and fracture toughness. The innovative cement-based binders displayed significant influence on the obtained results. Used in combination with reclaimed asphalt pavement material, they reduced cracking in MCE mixtures, improving their fatigue life.

Keywords:

fatigue life, fracture toughness, innovative road binder, mineral-cement-emulsion mixture.

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Skotnicki, Łukasz, & Kuźniewski, J. (2023). Cracking resistance of recycled mineral-cement-emulsion mixtures. Roads and Bridges - Drogi I Mosty, 22(1), 19–39. https://doi.org/10.7409/rabdim.023.002

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