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Impact of Ureolytic Bacteria on Strength Properties of Recycled Aggregate Concrete

  • Unique Paper ID: 166927
  • Volume: 11
  • Issue: 2
  • PageNo: 2356-2361
  • Abstract:
  • As the disposal of concrete waste poses the fewest environmental risks, the recycled coarse aggregate (RCA) concrete production technology is sometimes referred to as "green concrete." Regarding the water-to-cement ratio (w/c), the Indian standard suggests the desired mean compressive strength of conventional concrete. This study aims to propose a relationship between water cement ratios and compressive strength by examining the behavior of RCA concrete, which was made from two samples of parent concrete that were of various ages. The amount of recycling may have an impact on the RCA concrete's mechanical qualities. Examined are the effects of age and quantity of recycling on the RCA concrete's flexural strength, tensile splitting strength, air content, drying shrinkage strain, and capillary water absorption. The capillary water absorption increases suddenly while the compressive strength decreases gradually with the number of recycling, suggesting that additional recycle may not be advised. The addition of two ureolytic-type bacteria, Bacillus subtilis and Bacillus sphaericus, to RCA concrete to improve its characteristics. The purpose of the experimental studies is to assess how adding microorganisms to RCA concrete improves its drying shrinkage, capillary water absorption, and compressive strength. At the cell concentrations of 106 cells/ml for the two bacteria, there is an approximate 20% and 35% increase in the compressive strengths of RCA concrete, respectively. When bacteria are added, RCA's drying shrinkage and capillary water absorption are both decreased.
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Cite This Article

  • ISSN: 2349-6002
  • Volume: 11
  • Issue: 2
  • PageNo: 2356-2361

Impact of Ureolytic Bacteria on Strength Properties of Recycled Aggregate Concrete

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Impact Factor
8.01 (Year 2024)
UGC Approved
Journal no 47859

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