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This study provides an innovative approach to enhance the compaction and strength characteristics of Reclaimed Pavement Material (RPM) mixes by utilizing bio-enzyme, an organic stabilizer, without affecting nature. Various laboratory tests were performed by varying curing periods, cement dosages, and bio-enzyme (optimum dose) to analyze the effect of cement stabilization and enzymatic cement stabilization in RPM. The test results show that with an increase in cement percentage, there was a decrease in OMC and a consistent rise in MDD. The change in MDD and OMC in enzymatic cement stabilization is due to bio-clogging and bio-cementation. The hydrated cementitious products clog the voids between the soil and exhibit higher compressive strength. Pozzolanic activity is increased when bio-enzyme is added to the soil–cement mixture because it changes the clay matrix by microbial action. Therefore, C–S–H gel is formed, resulting in increased cohesion, bond strength, UCS, reduced porosity, and affinity to water.

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Study on Strength and Microstructural Properties of Bio-enzyme and Cementitious Treated Reclaimed Pavement Materials

  • 会议论文

  • 发表日期：

    2025年

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  • Ashish Mishra,
  • Sunny Deol Guzzarlapudi

摘要

This study provides an innovative approach to enhance the compaction and strength characteristics of Reclaimed Pavement Material (RPM) mixes by utilizing bio-enzyme, an organic stabilizer, without affecting nature. Various laboratory tests were performed by varying curing periods, cement dosages, and bio-enzyme (optimum dose) to analyze the effect of cement stabilization and enzymatic cement stabilization in RPM. The test results show that with an increase in cement percentage, there was a decrease in OMC and a consistent rise in MDD. The change in MDD and OMC in enzymatic cement stabilization is due to bio-clogging and bio-cementation. The hydrated cementitious products clog the voids between the soil and exhibit higher compressive strength. Pozzolanic activity is increased when bio-enzyme is added to the soil–cement mixture because it changes the clay matrix by microbial action. Therefore, C–S–H gel is formed, resulting in increased cohesion, bond strength, UCS, reduced porosity, and affinity to water.