Praktyczna ocena wpływu położenia dybli w szczelinach dylatacyjnych na ryzyko powstania zniszczeń nawierzchni z betonu cementowego

Piotr Jaskuła; Maksymilian Łazarowicz

doi:10.7409/rabdim.025.003

Praktyczna ocena wpływu położenia dybli w szczelinach dylatacyjnych na ryzyko powstania zniszczeń nawierzchni z betonu cementowego

Abstract

Cement concrete pavements are mainly implemented in Poland using unreinforced, dowelled and tieded pavement technology. The task of dowels in transverse expansion joints is to ensure proper transfer of loads between slabs and to allow free operation of slabs caused, among other things, by changes in thermal load. Recently, a significant problem has been observed in evaluating and resolving the issue of improperly placed dowels in expansion joints. So far, the assessment has consisted of categorising their location into three groups and taking relevant action based on contractual provisions (leading to financial deductions) rather than verified engineering knowledge. The consequence of these actions is that the development of this technology in the express road network has been significantly halted. Contractors, given the choice between asphalt or cement concrete technology, choose the former – among others for the abovementioned reasons. This paper presents a proposal for assessing the position of dowels in expansion joints based on the use of a superposition of four types of deviations from the ideal dowel position (defined in the equivalent diameter algorithm deq) in conjunction with the usual condition of permissible compressive stresses under the dowel, which is used for dowel dimensioning. The proposal presented here was used to evaluate the position of dowels in about a hundred expansion joints in five expressway pavements. Promising results have been achieved to estimate the risk of failure of concrete slabs over their service life.

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Category:: Articles
Type:: artykuły w czasopismach
Published in:: Roads and Bridges - Drogi i Mosty no. 24, pages 47 - 67,
ISSN: 1643-1618
Language:: English
Publication year:: 2025
Bibliographic description:: Jaskuła P., Łazarowicz M.: Praktyczna ocena wpływu położenia dybli w szczelinach dylatacyjnych na ryzyko powstania zniszczeń nawierzchni z betonu cementowego// Roads and Bridges - Drogi i Mosty -,iss. 1 (2025), s.47-67
DOI:: Digital Object Identifier (open in new tab) 10.7409/rabdim.025.003
Verified by:: Gdańsk University of Technology