Influence of exometabolites of Bacillus cereus strain microorganism on cement mortar properties was studied. According to the strength criterion, the optimal dosages of the bioadditives and the order of its introduction into the solution are established. The description of the mechanism of formation of the effect of bio-cementation is given.
Исследовано влияние экзометаболитов микроорганизма штамма Bacillus cereus, полученного из обводнённых грунтов, на прочность цементных растворов. Установлены количественные показатели повышения прочности на сжатие и изгиб цементных составов с биодобавкой. Определены оптимальные концентрации биодобавок по показателям подвижности цементного раствора и условия протекания процесса биоцементации. Показана эффективность применения биодобавок применительно к цементным системам.Ключевые слова: цементные растворы, механические и реологические свойства, биологические добавки, экзометаболиты Bacillus cereus.The effect of exometabolites of the microorganism of the strain Bacillus cereus, obtained from watereddown soils, on the strength of cement mortars is investigated. Quantitative indicators of increasing the compressive and bending strength of cement compositions with bioadditive are established. The optimal concentration of bioadditives was determined by the indicators of mobility of the cement mortar and the conditions of the process of biocementation. The effectiveness of the use of bioadditives in relation to cement systems is shown.
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