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<p>Lime mortar is a traditional construction material that was widely used as a primary binding agent before the 20th century. In this study, the performance of hydrated lime mortar is evaluated by incorporating pozzolanic materials such as micro silica, fly ash, and metakaolin. Since hydraulic lime contains a relatively low amount of silica and aluminates, pozzolanic materials are added in varying proportions to enhance mortar performance. Binders and mortars with two distinct ratios, 1:3 and 1:1, were prepared. In the 1:3 ratio, one part of quaternary lime binder was mixed with three parts of sand, whereas in the 1:1 ratio, one part of binder was mixed with one part of sand. Within the binder composition, 30% hydrated lime and 10% metakaolin were kept constant, while micro silica was varied from 10% to 50% and fly ash from 50% to 10%. Based on these variations in pozzolanic material content, ten mixes were proposed and studied. Fresh mortars were evaluated to determine the water-to-binder ratio for each mix. The mechanical and microstructural properties of all mortars were investigated. The compressive strength of the binders was determined at 14 and 28 days. Among the five binders, B1 exhibited the highest compressive strength of 13.66&#xa0;N/mm² compared to the others. Compressive strength of all ten mortar mixes was evaluated at 14, 28, and 56 days. Among the 1:3 ratio mortars, mix L3 showed the optimum strength of 9.028&#xa0;N/mm² at 56 days, while in the 1:1 ratio mortars, mix R2 exhibited the highest strength of 18.558&#xa0;N/mm². Overall, the 1:1 ratio mortars demonstrated higher compressive strength than the 1:3 ratio mortars. Microstructural analysis of the optimum-strength mortars was carried out using SEM, EDS, and X-ray analysis.</p>

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An experimental study on quaternary lime pozzolana based mortar

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月20日

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  • Perumandla Vinay Bhargav,
  • M. Madhukar

摘要

Lime mortar is a traditional construction material that was widely used as a primary binding agent before the 20th century. In this study, the performance of hydrated lime mortar is evaluated by incorporating pozzolanic materials such as micro silica, fly ash, and metakaolin. Since hydraulic lime contains a relatively low amount of silica and aluminates, pozzolanic materials are added in varying proportions to enhance mortar performance. Binders and mortars with two distinct ratios, 1:3 and 1:1, were prepared. In the 1:3 ratio, one part of quaternary lime binder was mixed with three parts of sand, whereas in the 1:1 ratio, one part of binder was mixed with one part of sand. Within the binder composition, 30% hydrated lime and 10% metakaolin were kept constant, while micro silica was varied from 10% to 50% and fly ash from 50% to 10%. Based on these variations in pozzolanic material content, ten mixes were proposed and studied. Fresh mortars were evaluated to determine the water-to-binder ratio for each mix. The mechanical and microstructural properties of all mortars were investigated. The compressive strength of the binders was determined at 14 and 28 days. Among the five binders, B1 exhibited the highest compressive strength of 13.66 N/mm² compared to the others. Compressive strength of all ten mortar mixes was evaluated at 14, 28, and 56 days. Among the 1:3 ratio mortars, mix L3 showed the optimum strength of 9.028 N/mm² at 56 days, while in the 1:1 ratio mortars, mix R2 exhibited the highest strength of 18.558 N/mm². Overall, the 1:1 ratio mortars demonstrated higher compressive strength than the 1:3 ratio mortars. Microstructural analysis of the optimum-strength mortars was carried out using SEM, EDS, and X-ray analysis.