Compressive deformation/failure of cement–asphalt mortars

• Autorzy: Liu Yongliang , Mu Mulan , Wang Junjie

Identyfikatory

DOI

10.1007/s43452-023-00710-x

• Języki publikacji: EN

Abstrakty

EN

Cement–asphalt mortar (CAM) has been widely used as a cushion layer in prefabricated concrete slab tracks. However, the deformation and failure of different CAMs under compression are scarcely understood. In this study, therefore, we studied the compressive deformation and failure modes of CAMs with different asphalt–cement ratios (A/Cs or m(A)/m(C) = 0.2 ~ 1.0) together with the temperature effects, to understand the mechanisms behind their mechanical behaviour. Results indicated that, at room temperature, CAMs with low A/Cs (0.2 ~ 0.4), namely CAM-Ls, deformed and failed in a quasi-brittle manner, whereas CAMs with high A/Cs (0.8 ~ 1.0), namely CAM-Hs, were more like ductile materials. The temperature effect could be negligible for CAM-Ls, but significant for CAM-Hs. Low temperatures would cause a ductile-to-brittle transition in CAM-Hs and high temperatures would pose an adverse effect on their deformation and failure under compression. To understand the deformation and failure mechanisms of different CAMs and the temperature effects, microstructural models for CABs with relevant A/Cs were proposed. The microstructural models of CABs demonstrated that the compressive deformation and failure of CAMs depend primarily on their CABs. It is also indicated that, experimentally and theoretically, the boundary A/C value between CAM-Ls and CAM-Hs might be around 0.6, below which the hardened cement paste (hcp) form the matrix of the CAM, whilst above which the asphalt binder turns to the primary continuous phase in the CAB. Due to the microstructure change in CABs with the increasing A/C, the CAMs transitioned from quasi-brittle to ductile materials under compression.

Słowa kluczowe

EN

cement-asphalt mortar; quasi-brittle; deformability; ductile-to-brittle transition; cement-asphalt binder; microstructural model

PL

odkształcalność; płyta betonowa; asfalt; cement

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 3
• Strony: art. no. e174, 2023
• Opis fizyczny: Bibliogr. 32 poz., fot., rys., wykr.

Twórcy

autor

Liu Yongliang

• School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, People’s Republic of China

autor

Mu Mulan

• Novel Polymer Technology Section, The Welding Institute, Cambridge CB21 6AL, UK

• https://orcid.org/0000-0003-2874-8582

autor

Wang Junjie

• Department of Civil Engineering, Tsinghua University, Beijing 100084, People’s Republic of China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)