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The study focuses on developing a Controlled Low-Strength Material (CLSM) using quarry waste. CLSM or flowable fill due to its self-levelling property can be used in areas where compacting earth is challenging. The effect of adding 0, 30, 50, 70 and 100% of quarry waste to replace the fly ash in the mix was investigated by studying the in-service and engineering properties and by carrying out microstructural analysis. The results reveal that the utilization of quarry waste reduced the water content and improved the flowability of CLSM. Significant improvement in the unconfined compressive strength (UCS) was observed with a maximum value of less than 2 MPa so as to warrant manual excavation. The high density of the mix with the addition of quarry waste was identified from microstructural analysis as the cause for strength enhancement. The trends in UCS were also reflected in the secant modulus and split tensile strength. The formation of cementitious compounds was the chief reason for the improvement in properties of CLSM.

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Behaviour of Controlled Low Strength Material Comprising Quarry Waste and Fly Ash

  • 会议论文

  • 发表日期：

    2025年

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  • U. Salini,
  • Anusha Parayil

摘要

The study focuses on developing a Controlled Low-Strength Material (CLSM) using quarry waste. CLSM or flowable fill due to its self-levelling property can be used in areas where compacting earth is challenging. The effect of adding 0, 30, 50, 70 and 100% of quarry waste to replace the fly ash in the mix was investigated by studying the in-service and engineering properties and by carrying out microstructural analysis. The results reveal that the utilization of quarry waste reduced the water content and improved the flowability of CLSM. Significant improvement in the unconfined compressive strength (UCS) was observed with a maximum value of less than 2 MPa so as to warrant manual excavation. The high density of the mix with the addition of quarry waste was identified from microstructural analysis as the cause for strength enhancement. The trends in UCS were also reflected in the secant modulus and split tensile strength. The formation of cementitious compounds was the chief reason for the improvement in properties of CLSM.