About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Oreshkin D.V. – doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Korolev E.V. – doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Semenov V.S. – candidate of technical sciences, associated professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Moscow state University of Civil Engineering The organization address: 129337, Russia, Moscow, Yaroslavskoe sh., 26 Pervushin G.N. – doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kalashnikov Izhevsk State Technical University The organization address: 426069, Russia, Izhevsk, Studencheskaya st., 7 |
| Title of the article | The true area of destruction of lightweight backfill materials at the equilibrium tests |
| Abstract. | The article is dedicated to the questions of fracture mechanics of lightweight cement backfill materials. Oil and gas wells cementing in the hard conditions (at presence of permafrost or beds with low capacity) demands applying of lightweight backfill mortars. Hollow glass microspheres are the one of the best filler for such mortars. They provide the specified technological and physical-and-mechanical properties of mortars, and form the homogeneous structure of backfill stone as well. Properties of lightweight backfill materials with swollen perlite sand and dressed hollow glass microspheres were examined. It was shown, that the true area of destruction considerably increases in comparison with the cross-sectional area of the sample. The methodology of determine of true destruction area of lightweight backfill stone samples with lightweight filler at the equilibrium test was suggested. The research results of structure and properties of lightweight backfill stone are given. The specific energy consumption at the start, the local crack growth resistance and the total destruction of the samples were defined. The results are considered from the viewpoint of fracture mechanics. It was found that backfill materials with microspheres have no analogues concerning crack resistance parameters. Usage of such mortars furthers increasing of well structure reliability and reduction of building costs. |
| Keywords. | Backfill materials, super-lightweight backfill stone, hollow glass microspheres, true area of destruction, specific parameters of deformation and fracture, fracture graphic analysis, crack resistance. |
| For citations: | Oreshkin D.V., Korolev E.V., Semenov V.S., Pervushin G.N. The true area of destruction of lightweight backfill materials at the equilibrium tests // Izvestiya KGASU. 2014. №3(29) P.127-132. |
