Abstract
The European building sector is facing a pressing issue of natural resources. Importing road building materials for the asphalt surfacing increases the cost of the asphalt mixture. The asphalt surfacing mixtures shall consist of a mixture of graded aggregates accounting for 80−90% of the total volume of the asphalt mixture, or 90−96% of the total weight of the asphalt mixture and binder: road bitumen or polymer modified bitumen. In the Republic of Lithuania, asphalt mixes are designed in accordance to the Design Regulations for Road Pavement Standardized Pavement Structures KP SDK 19 and accordance to the normative documents and their requirements for graded aggregates and binders. Road builders import graded aggregates to asphalt mixes from other countries, and this increases the cost of asphalt mixes. According to the scientific researches in the Lithuanian quarry Petrašiūnai II, using unique production technology is produced class I dolomite crushed stone, which mechanical, physical properties and designed asphalt mixtures can replace imported graded aggregates. The economic question remains as to the economic effect of the most commonly used asphalt mixtures in Lithuania AC 11 VS (asphalt mixture of asphalt pavement wearing course) and SMA 11 S (crushed and mastic asphalt) made from indigenous minerals compared to imported minerals. The aim of the paper is to perform the calculation and evaluation of the economic effect of asphalt mixtures AC 11 VS, SMA 11 S with different minerals and micro-aggregate. The paper identifies and analyses the properties of asphalt test mixtures, and identifies the locations of mineral suppliers in Lithuania. According to the economic impact assessment scheme, the economic effect of asphalt mixtures AC 11 VS, SMA 11 S with different minerals and micro-aggregate was calculated. According to the calculations made, the economic effect of producing asphalt mixtures AC 11 VS, SMA 11 S with class I dolomite chips is 13−14%.
Highlights
Importing road building materials for the asphalt surfacing increases the cost of the asphalt mixture
The asphalt surfacing mixtures shall consist of a mixture of graded aggregates accounting for
asphalt mixes are designed in accordance
Summary
Gauta 2019 m. birželio 28 d.; priimta 2019 m. liepos 4 d. Koks ekonominis efektas Lietuvoje dažniausiai naudojamų asfalto mišinių AC 11 VS (asfalto viršutinio sluoksnio asfaltbetonio mišinys) ir SMA 11 S (skaldos ir mastikos asfaltas), pagamintų iš vietinių mineralinių medžiagų, lyginant su įvežtinėmis mineralinėmis medžiagomis. Lietuvos Respublikoje projektuojant asfalto mišinius laikomasi eiliškumo bei normatyvinių dokumentų reikalavimų (1 paveikslas): Automobilių kelių standartizuotų dangų konstrukcijų projektavimo taisyklės KPT SDK 19; Automobilių kelių dangos konstrukcijos asfalto sluoksnių įrengimo taisyklės ĮT ASFALTAS 08; Automobilių kelių asfalto mišinių techninių reikalavimų aprašas TRA ASFALTAS 08; Automobilių kelių bitumų.
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