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Evaluation of Deformation Properties of Portland Cement Mortars Modified with Microfiber
The flooding of old mine workings after the closure of coal mining enterprises in Shakhty provoked the development of deformation processes of the rock mass This, in turn, is accompanied by uneven deformations of the soil mass in the foundations and the formation of cracks in the stone structures of buildings. Based on the analysis of studies in the field of concrete and mortar modification, as well as experimental studies, the positive effect of poly-propylene microfiber additives on the deformation characteristics of Portland cement mortars has been revealed. A significant in-crease in the water demand of the mixture with microfiber additives and, accordingly, a decrease in the rate of strength gain was revealed. A specially developed method for measuring deformations made it possible to evaluate the deformation of samples when testing solutions for uniaxial compression. The growth of the limit value of deformation of modified solutions in comparison with the control one by three times has been established. This will reduce the stress concentration in the masonry and the likelihood of cracks in the structures.
Evaluation of Deformation Properties of Portland Cement Mortars Modified with Microfiber
The flooding of old mine workings after the closure of coal mining enterprises in Shakhty provoked the development of deformation processes of the rock mass This, in turn, is accompanied by uneven deformations of the soil mass in the foundations and the formation of cracks in the stone structures of buildings. Based on the analysis of studies in the field of concrete and mortar modification, as well as experimental studies, the positive effect of poly-propylene microfiber additives on the deformation characteristics of Portland cement mortars has been revealed. A significant in-crease in the water demand of the mixture with microfiber additives and, accordingly, a decrease in the rate of strength gain was revealed. A specially developed method for measuring deformations made it possible to evaluate the deformation of samples when testing solutions for uniaxial compression. The growth of the limit value of deformation of modified solutions in comparison with the control one by three times has been established. This will reduce the stress concentration in the masonry and the likelihood of cracks in the structures.
Evaluation of Deformation Properties of Portland Cement Mortars Modified with Microfiber
Lecture Notes in Civil Engineering
Radionov, Andrey A. (editor) / Ulrikh, Dmitrii V. (editor) / Timofeeva, Svetlana S. (editor) / Alekhin, Vladimir N. (editor) / Gasiyarov, Vadim R. (editor) / Dmitrienko, V. A. (author) / Maslenikov, S. A. (author) / Pashkova, O. V. (author) / Dmitrienko, N. A. (author)
International Conference on Construction, Architecture and Technosphere Safety ; 2022 ; Sochi, Russia
2023-03-03
14 pages
Article/Chapter (Book)
Electronic Resource
English
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