Influence of wax temperature-reducing additives Viscodor PV-2 and Liсоmоnt ВS-100 on the durability of asphalt concrete

Introduction. In the conditions of constant increase of requirements to quality, economy and environmental friendliness of construction materials for road construction it is urgent to obtain warm asphalt concrete mixtures with improved characteristics. When selecting the technology and composition for warm asphalt concrete mixes, an important task is to evaluate the operational properties and calculate the service life of asphalt concrete.

Materials and methods. In the paper the influence of complex additive Viskodor PV-2 in comparison with known imported wax additive Liсоmоnt ВS-100 on physical and operational properties of warm asphalt concrete mixture of A16Vn grade was investigated. BND 70/100 bitumen was used as the initial bitumen, crushed stone and granite rock crushing screenings and limestone mineral powder MP-2 were used in the composition of the mineral part of the asphalt-concrete mixture.
To investigate the physical and operational properties of the asphalt concrete mixture, methods were used in accordance with the current standards.

Results. The results of evaluation of the effect of the investigated wax additives on the compactibility of asphalt concrete mixture at lower molding temperatures than the control hot asphalt concrete mixture are presented. A comparison of load resistance of the control specimen of asphalt concrete without additives and specimens with the investigated additives was carried out. Based on the obtained data, the service life of the tested asphalt concrete specimens was calculated by the criterion of resistance to plastic deformations.

Conclusions. It was established that the investigated additives allow not only to reduce the temperature of preparation and compaction of asphalt-concrete mixture, but also essentially improve qualitative characteristics of asphalt concrete: water resistance coefficient, resistance to loads and plastic deformations. As a consequence, increase the service life of the road surface. It is revealed that the developed complex additive Viskodor PV-2 is not inferior and even significantly exceeds the efficiency of imported additive Liсоmоnt ВS-100.

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