Abstract
Errors of optimal composition asphalt concrete mixture designed in the laboratory and their importance for road construction are investigated. After the analysis of asphalt concrete production according to the traditional technology, factors influencing its structure, characteristics and quality are systematised. Mathematical models of dependence of medium quadratic deviations of siftings of finite dosed mineral materials through control sieves on the means of siftings are estimated by a regressive analysis. Variations of grading of hot fractions 0–5 mm and 5–15 mm as well as cold mineral powder sieved through technological sieves of mixing equipment and influence of errors of dosing these mineral materials in the produced mixture on the stability of quantity of containing mineral components (crushed stone, sand and mineral filler) are identified. The main trends of asphalt concrete structure and handling of its equipment methods improvement are presented.
Highlights
The purpose and functions of asphalt concrete components were identified and the methods of its mixture composition created by Sacharov P
Some specialists carrying out the functions of the customers who purchase and use asphalt concrete mixture for constructing roads of national importance agree with them as well.The quality of asphalt concrete mixture production is higher in a modem computerised asphalt concrete mixing plant providing that the operator handling the technological process carries out his work properly
The diagram of technological factors importance influencing the variation of crushed stone (CS) quantity contained in asphalt concrete mixture produced from hot mineral materials of tractions of 0-5 mm and 5-15 mm as well as cold mineral powder weighed in the same dosing equipment in sampling action asphalt concrete mixing plant cr~ = 12,03% cr 2 =3.47%
Summary
The purpose and functions of asphalt concrete components were identified and the methods of its mixture composition created by Sacharov P. Some specialists carrying out the functions of the customers who purchase and use asphalt concrete mixture for constructing roads of national importance agree with them as well.The quality of asphalt concrete mixture production is higher in a modem computerised asphalt concrete mixing plant providing that the operator (a human being) handling the technological process carries out his work properly. To use the technical capabilities of the maintained asphalt concrete mixing plant's construction to its maximum, the influence of all or at least the most important technological factors of asphalt concrete mixture production on its quality shall be known. Having identified the influence of such factors on the quality of asphalt concrete mixture production, the construction, work regime and handling method of equipment could be improved. The aim of this study is to identify technological factors of asphalt concrete mixture production which mostly influence the homogeneity of its mineral components' grading and to present theoretical principles as well as practical methods for increasing the same quality of products
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