Selection of soil-cement for tamponing voids in limestone-shell rock
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2017, Vol 1, Issue 69
Abstract
The article is devoted to the selection of the composition of special concrete for strengthening (bookmarking) artificial underground mine workings, natural voids, faults, landslides and cracks. The methodology for solving such a problem consists in selecting the raw material for concrete, preparing a mixture of the required workability, equipment for preparing transportation and laying concrete mix of concrete of the required strength. As a filler loam - waste in the construction of underground parts of buildings and structures in the Odessa region was chosen. Portland cement grade 400 of Odessa factory. Preparation of a concrete mix in a high-speed mixer. Transportation of media through pipes under pressure. The mixture is cast, self-flowing with a maximum grain size of up to 200 μm. Therefore, the product was called micro-concrete. Its necessary mark is within 10-40. The properties of the raw material, mixture and concrete were studied. A cost-effective material for embedding voids was selected. The problem of waste utilization in the development of excavation in clay soils has been solved. Eliminating the pores and voids of underground mining workings ‒ to ensure the reliability of the operation of buildings and structures with seismic resistance up to 7 magnitudes.
Authors and Affiliations
V. M. Mitinskiy, A. Kucherenko, T. A. Sushitskaya
Keywords
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