DOI 10.21440/2307-2091-2016-3-70-73

The issue of quality assessment of quarry roads pdf

Yu. I. Lel’, S. A. Aref’ev, A. V. Glebov, D. Kh. Il’bul’din

As a result of studies the authors determined interrelation and area of application of the basic indicators of quality of career roads: rolling resistance, road pavement durability and deformability of road pavement. In the conditions of career «Yubileynyy» of «ALROSA» company and JSC «Uralasbest» the authors proposed and tested the method for estimating rolling resistance coefficient of dump trucks by consumption of diesel fuel using fuel consumption monitoring devices FMS and  electronic combustion engine controllers. Authors also established close regression relationships of coefficients of rolling resistance with coefficients of road pavement durability and relative deformability of pavements. The research proves that insufficiency of pavements strength provides a good explanation for a large variation (change of 1.8...2.0-fold) and low stability over time of rolling resistance coefficient on quarry roads with the same type of coating. Obtaining a reliable assessment of the rolling resistance coefficients is possible only under the normative values of durability coefficients (k_dur ≥ 0,95), which can be ensured by sealing road pavements. In order to improve quality of quarry roads and reduce their construction costs the authors propose sealing technology with the use of pit dump trucks without excluding them from the technological cycle. The technology consists in strict compliance with sealing modes by adjusting the number of passes of cars on the road width, speed and load of dump trucks. The technology was tested at the experimental site of career of JSC «Uralasbest». The article contains the developed technological regulations of sealing macadam road pavements by dump trucks with carrying capacity of 130 tons; as well as the dependences of road pavement density and durability ratio from the number of dump trucks passes over one track. 15–20 passes of car on compaction area provide the regulatory road pavement quality indicators (k_dur ≥ 0,95).

Keywords: rolling resistance; the strength of road pavement; deformity of road pavement; expenditure of diesel fuel; sealing of road pavement; the number of dump truck passes.

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