نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی عمران، واحد مرودشت، دانشگاه آزاد اسلامی، مرودشت، ایران
2 گروه مهندسی عمران، مرکز میمند، دانشگاه آزاد اسلامی، میمند، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this paper, the effect of bacteria on self-healing concrete with fly ash has been studied. Sporosarcina bacteria with four different concentrations were used for evaluation. In concrete with fly ash, fly ash is replaced by 20% by weight of cement of mixing design has been used. In order to evaluate and control the specimen, destructive and non-destructive tests such as ultrasonic, permeability, water absorption and compressive strength have been used. To evaluate the effect of bacteria on self-healing of concrete cracks, concrete cracks were studied using scanning electron microscopy (SEM) and light microscope. The results show that the concentration of 10.46 × 106 is the most suitable concentration of Sporosarcina for the production of calcite and filling the pores of concrete by products such as calcium carbonate. The mentioned concentration resulted in a 36% increase in compressive strength in specimen with fly ash and a 30% increase in specimen without fly ash. The results also showed that increasing the bacterial concentration did not cause significant changes in compressive strength, water absorption, impermeability and ultrasonic wave velocity.
کلیدواژهها [English]