Study of corrosion resistance of modified concretein the sewage medium ИССЛЕДОВАНИЕ КОРРОЗИОННОЙ СТОЙКОСТИ МОДИФИЦИРОВАННОГО БЕТОНА В СРЕДЕ СТОЧНЫХ ВОД

• Main Authors: Koroleva Elena Leonidovna, Matveeva Elena Gennad’evna, Naumenko Ol’ga Viktorovna, Nyrikova Tat’yana Nikolaevna
• Format: Article
• Language: English
• Published: Moscow State University of Civil Engineering (MGSU) 2013-02-01
• Series: Vestnik MGSU
• Subjects: concrete; nanoscale additives; corrosion resistance; durability; superplasticizer; silica fume; бетон; коррозионная стойкость; долговечность; суперпластификатор; микрокремнезем
• Online Access: http://vestnikmgsu.ru/files/archive/RUS/issuepage/2013/2/12.pdf
• ISSN: 1997-0935; 2304-6600

The objective of the research project was to design multi-component concrete with an optimized pore structure designated for sewage water treatment facilities. It was followed by the study of their stability in aggressive environments. Measurement of mesopores and macropores with diameters of 0.0055 to 360 mcm was taken using AutoPore IV 9500 porosimeter. X-ray analysis of samples was performed using diffractometer ARL X’TRA produced by Thermo Scientific (Switzerland). Modified 28-day concrete cubes were exposed to aggressive environments for 1 year at low (+4 ± 2 °C) and high temperatures (+20 ± 2 °C) to identify their linear deformation characteristics. Compressive strength of samples was tested upon completion of each three-month period.The authors have found out that degradation of concrete samples in the corrosive environment of waste waters accompanied by generation of thaumasite is less intensive than that in the waste waters that have ettringite generated. Thus, the authors have discovered that the lower the temperature of the aggressive environment of the waste water, the more intensive the formation of ettringite that causes destruction of the concrete. Optimization of the concrete structure is attained through the optimization of the concrete composition. Application of fine-grained silica causes generation of concrete that is highly resistant to the aggressive effects of sulfates and chlorides.<br>Приведены результаты исследований влияния различных видов модификаторов на коррозионную стойкость модифицированных бетонов в агрессивной среде сточных вод. Дана характеристика агрессивной среды. Спроектированы составы модифицированных бетонов с оптимальной поровой структурой.