CRACK GROWTH RESISTANCE OF BITUMINOUS CONCRETE PAVEMENT
Abstract
The methods used toincrease temperature resistance of bituminous concrete pavement are in the focus of researches in the sphere of road engineering which study first of all the bituminous concrete mixtures with polymer modified cementing bitumen. But the most common polymers of styrene-butadiene-styrene type, like DST-30–01, Kraton, Lupren LG, considerablyincrease costs of highways construction. That’s why the researchers have restarted study on possible use of the waist of tyre manufacturing as modifier.
The study refers to the powder of discretely devulcanized rubber which serves as modifier under the name of Unirem.
The authors’ technology permits to manufacture polymer astringent bitumen.
Evaluation of low temperature properties of such material were conducted during typical testing according to AASHTO TP1 standard that figures on the list of specifications «Superpave».
The tests revealed the data on crack resistance of rubber-bitumen cementing component of highways. A new method of analysis of deformation of cementing properties under low temperature and v aried speed of reconstruction of lost properties is proposed. The results of “dry” and “wet” modes for the initial and modified bitumen components are compared.
Bringing in of rubber granules by “dry” mode doesn’t ensure stability of the properties of bituminous concrete pavement. While the introduction of the rubber granules into bitumen and concrete mixture together with rubber-bitumen cementing component positively affects crack growth resistance and reduces the total costs of highway construction.
About the Authors
G. S. Duhovny
V. Shuhov Belgorod State Technological University, Belgorod
Russian Federation
Ph.D. (Tech), professor at the department of motor roads and railways
Russian Federation
Ph.D. (Tech), professor at the department of motor roads and railways
A. V. Sachkova
V. Shuhov Belgorod State Technological University, Belgorod
Russian Federation
engineer
Russian Federation
engineer
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Review
For citations:
Duhovny G.S., Sachkova A.V. CRACK GROWTH RESISTANCE OF BITUMINOUS CONCRETE PAVEMENT. World of Transport and Transportation. 2013;(1):60-63. (In Russ.)
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