Naslov
Development of Model for Temperature Correction Factors of Flexible Pavement Deflections

Autori
Mladenović, Goran ; Ištoka Otković, Irena ; Orešković, Marko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
4th Serbian Road Congres / Tubić, Vladan ; Fric, Sanja - Beograd : Srpsko društvo za puteve, 2022, 1-12

ISBN
978-86-88541-13-8

Skup
4th Serbian Road Congres

Mjesto i datum
Beograd, Srbija, 02.06.2022. - 03.06.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Deflection, flexible pavement, stiffnes modulus, neural networks, regression models

Sažetak
The temperature of asphalt layers has, in addition to loading, the most significant influence on the pavement deflections below the load and within the deflection bowl. Existing models for temperature correction factors have been developed on the basis of foreign experience and do not take into account the asphalt mixtures used in the region. The paper presents research with the aim of developing models for correction factors that can be applied in the procedures of deflection analysis and bearing capacity calculation of existing pavement structures. The research consists of three parts. The stiffness moduli of asphalt mixtures AC11s for the wearing course and AC 22sA for the base layer were obtained from their master curves, which were constructed on the basis of laboratory tests of stiffness modules. The calculation of deflection was performed by the EVERSTRESS program for three levels of flexible and semi-rigid pavement structures, with asphalt layer thicknesses from 100 mm to 210 mm. The obtained deflections were used for the calculation of the correction factor to the reference temperature of 20oC for the temperature range from 10oC to 30oC, which is considered realistic and desirable for deflection measurements on flexible pavement structures. Finally, a model for correction factors was developed and validated using neural networks. The model includes flexible and semi-rigid pavement structures, and in addition to the temperature of the asphalt layers, it also includes the thickness of the layers and the distance of the deflection from the center of the loading.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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