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<p>This study addresses the role of SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> particles resulting from the application of a Portland cement additive in pavement-quality concrete (PQC). The incorporation levels of the additive were 0, 2, 4, 6, and 8%, respectively. The effects of incorporating this additive on the fresh, mechanical, and hardened properties of the PQC layer are examined. To ascertain inter-particulate behaviour, the pozzolanic activity of this additive microstructural characteristic is also explored for the PQC mixes in addition to varying amounts of stabilizer. The beneficial impact of this additive is observed in improving strength and microstructural properties. The inclusion of this stabilizer improves compressive strength, consistency, and setting time. The addition of 4% additive by dry weight of cement improves the compressive strength by 13.62%. Microstructure analysis has shown promising results in improving durability and cracking resistance, as the introduction of SiO<sub>2</sub> produces more C–S–H gels, lowers Ca(OH)<sub>2</sub>, and refines the microstructure, thereby leading to improved strength of the mixture.</p>

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Evaluation of the efficacy of silica-based additive on pavement quality concrete

  • 期刊论文

  • 发表日期：

    2026年4月30日

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  • Supriya Marik,
  • R N Ransinchung G D

摘要

This study addresses the role of SiO2 and Al2O3 particles resulting from the application of a Portland cement additive in pavement-quality concrete (PQC). The incorporation levels of the additive were 0, 2, 4, 6, and 8%, respectively. The effects of incorporating this additive on the fresh, mechanical, and hardened properties of the PQC layer are examined. To ascertain inter-particulate behaviour, the pozzolanic activity of this additive microstructural characteristic is also explored for the PQC mixes in addition to varying amounts of stabilizer. The beneficial impact of this additive is observed in improving strength and microstructural properties. The inclusion of this stabilizer improves compressive strength, consistency, and setting time. The addition of 4% additive by dry weight of cement improves the compressive strength by 13.62%. Microstructure analysis has shown promising results in improving durability and cracking resistance, as the introduction of SiO2 produces more C–S–H gels, lowers Ca(OH)2, and refines the microstructure, thereby leading to improved strength of the mixture.