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      Ghan Shyam
       
      
      
      Deepak Mathur
       
        
      
      
      Keywords: 
      
      Self-healing Concrete, Fly ash, Silica fume and Bacillus subtilis etc. 
        
      
      Abstract: 
      
The use of self-healing concrete provides an alternative method to repair cracks that form over time as a result of environmental impacts, heavy traffic, and defects in the material. This distinctive range of concrete contains microorganisms, including bacteria and fungi, along with nutrients and healing substances. These microbes are activated when water enters the cracks and begins to heal the concrete. They produce calcium carbonate, a material that fills up the cracks in the concrete and helps it restore its strength. This process is known as "self-healing" because it parallels the way our bones heal themselves. Self-healing concrete extends the life of structures, including bridges, buildings, and roads, while likewise improving their durability and lowering maintenance costs. This makes infrastructure more durable and resilient since it can tolerate degradation over time. In this research work consider M30 grade of concrete to perform experimental work. For this work use Bacillus subtilis, that is a type of bacteria and use silica fume and fly ash as replacement materials concrete mix. 0, 5, 10 and 15% Silica-fume and fly-ash are replacing with cement. Major goal of this work to find out optimum concentration of bacteria for concrete and after that prepared concrete mix with one combination is optimum solution of bacteria and silica fume second combination is optimum solution of bacteria and fly ash. 
        
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      International Journal of Recent  Research and Review
 
         
        
      ISSN: 2277-8322 
 Vol. XVII, Issue 2
 June 2024
 
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      PUBLISHEDJune 2024
 
 
      ISSUEVol. XVII, Issue 2
 
        
      SECTIONArticles
 
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