Abstract
This paper determines the interaction between the physical indicators of frost blanket course and its deflection modulus, measured by static and dynamic devices. The Pilot Road has been selected to examine the strength properties (deflection module) of frost blanket course. A Pilot Road consisting of 27 road sections, divided into 5 different road structures. A Pilot Road has been selected to examine the strength properties (deflection module) of frost blanket course. In this research was determined the strength of frost blanket course in road pavement structures of Pilot Road by four devices: Falling Weight Deflectometer Dynatest 8000, Light Weight Deflectometers Prima 100 and ZORN ZSG 02 and Static Beam Strassentest. The results showed no reliable correlation between the deflection modulus, measured by different devices, and the physical indicators of the frost blanket course of the road pavement structures in Pilot Road.
Highlights
A frost blanket course (FBC) protects road pavement structure from the damaging effect of frost
This paper determines the interaction between the physical indicators of FBC and its deflection modulus, measured by static and dynamic devices
Devices and different physical indicators influence the different values of FBC deflection modulus: course thickness h, filtration coefficient kf, gradation p0.063, and remaining on the 2 mm sieve p2) (Figure 4)
Summary
A frost blanket course (FBC) protects road pavement structure from the damaging effect of frost. A frost blanket course is obligatory when the layers of the road pavement structure are constructed from water permeable materials, and the subgrade is moistened continuously or periodically. The purpose of FBC is to carry loads, generated by traffic and by layers of the road pavement structure, and to distribute them to the subgrade (Kavussi, Rafiei, & Yasrobi, 2010). Load effect, caused by motor vehicle wheels to the road pavement structure is one of the most deciding factors determining the behaviour of the road surface during its life cycle (Vaitkus & Paliukaitė, 2013). The static and dynamic deflection measurement methods are used to determine the deflection module of the road pavement structure. This paper determines the interaction between the physical indicators of FBC and its deflection modulus, measured by static and dynamic devices
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